Subj : [1/2] Southern Ontario Weather To : All From : Northern Realms Date : Mon Aug 18 2025 15:35:00 FPCN11 CWTO 181930 Forecasts for Southern Ontario and the National Capital Region issued by Environment Canada at 3:30 p.m. EDT Monday 18 August 2025 for tonight Tuesday and Tuesday night. The next scheduled forecast will be issued at 5:00 a.m. EDT Tuesday. City of Toronto. Tonight..Clear. Wind east 20 km/h becoming light near midnight. Low 17. Tuesday..Mainly cloudy. 30 percent chance of showers late in the afternoon with risk of a thunderstorm. Wind becoming southeast 20 km/h in the morning. High 25. Humidex 30. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h. Low 19. Windsor - Leamington - Essex County. Tonight..Partly cloudy. Becoming cloudy overnight. Fog patches developing overnight. Wind east 20 km/h becoming light this evening. Low 17. Tuesday..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Fog patches dissipating in the morning. High 27. Humidex 37. UV index 6 or high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening. Low 19. Chatham-Kent - Rondeau Park. Tonight..Partly cloudy. Fog patches developing overnight. Wind east 20 km/h becoming light this evening. Low 16. Tuesday..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Fog patches dissipating in the morning. High 27. Humidex 33. UV index 6 or high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening. Low 18. Sarnia - Petrolia - Western Lambton County. Tonight..Partly cloudy. Wind northeast 20 km/h becoming light this evening. Low 14. Tuesday..Cloudy with 70 percent chance of showers and risk of a thunderstorm. High 26. Humidex 31. UV index 6 or high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening. Low 18. Watford - Pinery Park - Eastern Lambton County. Tonight..Partly cloudy. Becoming clear this evening. Wind northeast 20 km/h becoming light this evening. Low 14. Tuesday..A mix of sun and cloud with 70 percent chance of showers and risk of a thunderstorm. High 26. Humidex 31. UV index 9 or very high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening. Low 18. Rodney - Shedden - Western Elgin County. Tonight..Partly cloudy. Becoming clear this evening. Wind east 20 km/h becoming light this evening. Low 15. Tuesday..Becoming cloudy in the morning with 30 percent chance of showers late in the morning and early afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. High 27. Humidex 32. UV index 7 or high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening and after midnight. Low 18. St. Thomas - Aylmer - Eastern Elgin County. Tonight..Partly cloudy. Becoming clear this evening. Wind east 20 km/h becoming light this evening. Low 15. Tuesday..A mix of sun and cloud. 30 percent chance of showers late in the morning and early afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. High 26. Humidex 31. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening and after midnight. Low 18. Strathroy - Komoka - Western Middlesex County. Tonight..Partly cloudy. Clearing this evening. Wind east 20 km/h becoming light this evening. Low 13. Tuesday..A mix of sun and cloud. Becoming cloudy late in the morning with 30 percent chance of showers late in the morning and early afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. High 27. Humidex 31. UV index 7 or high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening and after midnight. Low 17. London - Parkhill - Eastern Middlesex County. Tonight..Partly cloudy. Becoming clear this evening. Wind east 20 km/h becoming light this evening. Low 13. Tuesday..Mainly sunny. Increasing cloudiness in the morning then 30 percent chance of showers late in the morning and early afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. High 27. Humidex 31. UV index 9 or very high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening and after midnight. Low 17. Simcoe - Delhi - Norfolk. Tonight..Partly cloudy. Becoming clear this evening. Wind northeast 20 km/h becoming light this evening. Low 12. Tuesday..Increasing cloudiness early in the morning. 40 percent chance of showers in the afternoon. Risk of a thunderstorm late in the afternoon. High 27. Humidex 32. UV index 9 or very high. Tuesday night..Cloudy with 70 percent chance of showers. Risk of a thunderstorm in the evening and after midnight. Low 17. Dunnville - Caledonia - Haldimand. Tonight..Partly cloudy. Becoming clear this evening. Wind northeast 20 km/h becoming light this evening. Low 14. Tuesday..A mix of sun and cloud. 40 percent chance of showers in the afternoon. Risk of a thunderstorm late in the afternoon. High 26. Humidex 31. UV index 9 or very high. Tuesday night..Cloudy with 70 percent chance of showers. Risk of a thunderstorm in the evening and after midnight. Low 17. Woodstock - Tillsonburg - Oxford County. Tonight..Clearing early this evening. Wind northeast 20 km/h becoming light this evening. Low 12. Tuesday..Sunny early in the morning then a mix of sun and cloud with 40 percent chance of showers in the afternoon. Risk of a thunderstorm late in the afternoon. High 27. Humidex 32. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers. Risk of a thunderstorm in the evening and after midnight. Low 16. Brantford - County of Brant. Tonight..Clear. Wind northeast 20 km/h becoming light this evening. Low 12. Tuesday..A mix of sun and cloud. 40 percent chance of showers in the afternoon. Risk of a thunderstorm late in the afternoon. High 26. Humidex 31. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers. Risk of a thunderstorm in the evening and after midnight. Low 16. Niagara Falls - Welland - Southern Niagara Region. Tonight..Clear. Becoming partly cloudy overnight. Wind northeast 20 km/h becoming light this evening. Low 14. Tuesday..A mix of sun and cloud. 40 percent chance of showers late in the afternoon with risk of a thunderstorm. High 27. Humidex 32. UV index 9 or very high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind becoming north 20 km/h near midnight. Low 17. St. Catharines - Grimsby - Northern Niagara Region. Tonight..Partly cloudy. Becoming clear this evening. Wind northeast 20 km/h becoming light this evening. Low 14. Tuesday..A mix of sun and cloud. 40 percent chance of showers late in the afternoon with risk of a thunderstorm. High 26. Humidex 31. UV index 9 or very high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind becoming north 20 km/h near midnight. Low 19. City of Hamilton. Tonight..Clearing. Wind northeast 20 km/h becoming light this evening. Low 15. Tuesday..A mix of sun and cloud. 40 percent chance of showers late in the afternoon with risk of a thunderstorm. High 24. Humidex 31. UV index 9 or very high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind becoming north 20 km/h near midnight. Low 18. Burlington - Oakville. Tonight..Partly cloudy. Becoming clear this evening. Wind east 20 km/h becoming light near midnight. Low 16. Tuesday..A mix of sun and cloud. 30 percent chance of showers late in the afternoon with risk of a thunderstorm. Wind becoming southeast 20 km/h in the morning. High 25. Humidex 31. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h. Low 18. Halton Hills - Milton. Tonight..Clear. Wind east 20 km/h becoming light near midnight. Low 13. Tuesday..Mainly cloudy. 30 percent chance of showers late in the afternoon with risk of a thunderstorm. Wind becoming southeast 20 km/h in the morning. High 25. Humidex 28. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h. Low 16. Mississauga - Brampton. Tonight..Clear. Wind east 20 km/h becoming light near midnight. Low 15. Tuesday..Mainly cloudy. 30 percent chance of showers late in the afternoon with risk of a thunderstorm. Wind becoming southeast 20 km/h in the morning. High 24. Humidex 28. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h. Low 17. Caledon. Tonight..Clear. Becoming partly cloudy near midnight. Wind east 20 km/h becoming light this evening. Low 13. Tuesday..Mainly cloudy. 30 percent chance of showers late in the morning and early afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming east 20 km/h in the morning. High 23. Humidex 27. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening and after midnight. Low 15. Vaughan - Richmond Hill - Markham. Tonight..Clear. Becoming partly cloudy near midnight. Wind east 20 km/h becoming light near midnight. Low 14. Tuesday..A mix of sun and cloud. 30 percent chance of showers late in the afternoon with risk of a thunderstorm. Wind becoming southeast 20 km/h in the morning. High 23. Humidex 28. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h. Low 17. Newmarket - Georgina - Northern York Region. Tonight..Clear. Low 12. Tuesday..Mainly cloudy. 70 percent chance of showers late in the morning and in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming east 20 km/h in the morning. High 24. Humidex 29. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening. Wind northeast 20 km/h becoming light in the evening. Low 16. Pickering - Oshawa - Southern Durham Region. Tonight..A few clouds. Wind east 20 km/h becoming light near midnight. Low 14. Tuesday..A mix of sun and cloud. 30 percent chance of showers late in the afternoon with risk of a thunderstorm. Wind becoming southeast 20 km/h in the morning. High 24. Humidex 29. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h. Low 17. Uxbridge - Beaverton - Northern Durham Region. Tonight..A few clouds. Low 12. Tuesday..A mix of sun and cloud. 30 percent chance of showers in the afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming east 20 km/h in the morning. High 24. Humidex 29. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h becoming light in the evening. Low 16. Goderich - Bluewater - Southern Huron County. Tonight..Partly cloudy. Wind becoming southeast 20 km/h late this evening. Low 14. Tuesday..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h. High 25. Humidex 30. UV index 6 or high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening. Low 16. Wingham - Blyth - Northern Huron County. Tonight..Partly cloudy. Wind becoming southeast 20 km/h late this evening. Low 14. Tuesday..Mainly cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h. High 24. Humidex 28. UV index 7 or high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening. Low 16. Stratford - Mitchell - Southern Perth County. Tonight..Partly cloudy. Clearing this evening. Wind east 20 km/h becoming light this evening. Low 12. Tuesday..A mix of sun and cloud. 30 percent chance of showers late in the morning and early afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming east 20 km/h in the morning. High 27. Humidex 31. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening and after midnight. Low 16. Listowel - Milverton - Northern Perth County. Tonight..Clear. Becoming partly cloudy near midnight. Wind east 20 km/h becoming light this evening. Low 12. Tuesday..Mainly cloudy. 30 percent chance of showers late in the morning and early afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming east 20 km/h in the morning. High 23. Humidex 27. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening and after midnight. Low 16. Kitchener - Cambridge - Region of Waterloo. Tonight..Clear. Wind east 20 km/h becoming light this evening. Low 11. Tuesday..A mix of sun and cloud. 30 percent chance of showers late in the morning and early afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming east 20 km/h in the morning. High 24. Humidex 28. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening and after midnight. Low 15. Guelph - Erin - Southern Wellington County. Tonight..Clear. Wind east 20 km/h becoming light this evening. Low 11. Tuesday..A mix of sun and cloud. 30 percent chance of showers late in the morning and early afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming east 20 km/h in the morning. High 24. Humidex 28. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening and after midnight. Low 15. Mount Forest - Arthur - Northern Wellington County. Tonight..Clear. Becoming partly cloudy near midnight. Wind east 20 km/h becoming light this evening. Low 11. Tuesday..Mainly cloudy. 30 percent chance of showers late in the morning and early afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming east 20 km/h in the morning. High 24. Humidex 28. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening and after midnight. Low 15. Orangeville - Grand Valley - Southern Dufferin County. Tonight..Clear. Becoming partly cloudy near midnight. Wind east 20 km/h becoming light this evening. Low 11. Tuesday..Mainly cloudy. 30 percent chance of showers late in the morning and early afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming east 20 km/h in the morning. High 23. Humidex 26. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening and after midnight. Low 15. Shelburne - Mansfield - Northern Dufferin County. Tonight..Clear. Becoming partly cloudy near midnight. Wind east 20 km/h becoming light this evening. Low 11. Tuesday..Mainly cloudy. 30 percent chance of showers late in the morning and early afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming east 20 km/h in the morning. High 23. Humidex 26. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening and after midnight. Low 15. Innisfil - New Tecumseth - Angus. Tonight..Clear. Becoming partly cloudy near midnight. Low 11. Tuesday..Mainly cloudy. 70 percent chance of showers late in the morning and in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming east 20 km/h in the morning. High 24. Humidex 27. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening. Wind northeast 20 km/h becoming light in the evening. Low 15. Saugeen Shores - Kincardine - Southern Bruce County. Tonight..Clear. Increasing cloudiness near midnight. Low 15. Tuesday..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind becoming northeast 20 km/h in the morning. High 24. Humidex 28. UV index 6 or high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening. Wind northeast 20 km/h. Low 17. Bruce Peninsula - Sauble Beach - Tobermory. Tonight..Increasing cloudiness. Wind east 20 km/h. Low 14. Tuesday..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h. High 23. Humidex 27. UV index 5 or moderate. Tuesday night..Mainly cloudy. 70 percent chance of showers changing to 30 percent chance of showers or drizzle in the evening. Risk of a thunderstorm early in the evening. Wind east 20 km/h becoming light in the evening. Low 16. Hanover - Dundalk - Southern Grey County. Tonight..Clear. Becoming partly cloudy late this evening. Low 12. Tuesday..Mainly cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind becoming northeast 20 km/h in the morning. High 22. Humidex 25. UV index 6 or high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening. Wind northeast 20 km/h. Low 15. Owen Sound - Blue Mountains - Northern Grey County. Tonight..Clear. Increasing cloudiness this evening. Low 14. Tuesday..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind becoming northeast 20 km/h in the morning. High 22. Humidex 25. UV index 5 or moderate. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening. Wind northeast 20 km/h. Low 15. Barrie - Collingwood - Hillsdale. Tonight..Clear. Becoming partly cloudy near midnight. Low 13. Tuesday..Mainly cloudy. 70 percent chance of showers late in the morning and in the afternoon with risk of a thunderstorm. Wind becoming east 20 km/h in the morning. High 23. Humidex 26. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening. Wind east 20 km/h becoming light near midnight. Low 15. Midland - Coldwater - Orr Lake. Tonight..Partly cloudy. Low 13. Tuesday..Cloudy. 70 percent chance of showers late in the morning and in the afternoon with risk of a thunderstorm. Wind becoming east 20 km/h in the morning. High 23. Humidex 26. UV index 7 or high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening. Wind east 20 km/h becoming light near midnight. Low 15. Orillia - Lagoon City - Washago. Tonight..Partly cloudy. Low 13. Tuesday..Mainly cloudy. 70 percent chance of showers late in the morning and in the afternoon with risk of a thunderstorm. Wind becoming east 20 km/h in the morning. High 23. Humidex 26. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm in the evening. Wind east 20 km/h becoming light near midnight. Low 15. Cobourg - Colborne - Western Northumberland County. Tonight..Partly cloudy. Wind northeast 20 km/h becoming light late this evening. Low 13. Tuesday..A mix of sun and cloud. 30 percent chance of showers late in the afternoon. Wind becoming east 20 km/h late in the morning. High 23. Humidex 27. UV index 7 or high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h. Low 16. Belleville - Quinte West - Eastern Northumberland County. Tonight..Partly cloudy. Wind northeast 20 km/h becoming light late this evening. Low 12. Tuesday..Increasing cloudiness. 30 percent chance of showers late in the afternoon. Wind becoming east 20 km/h late in the morning. High 24. Humidex 28. UV index 7 or high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h. Low 16. Picton - Sandbanks Park. Tonight..Partly cloudy. Wind northeast 20 km/h becoming light late this evening. Low 13. Tuesday..Increasing cloudiness. 30 percent chance of showers late in the afternoon. Wind becoming east 20 km/h late in the morning. High 23. Humidex 26. UV index 7 or high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h. Low 18. Napanee - Consecon. Tonight..Partly cloudy. Wind northeast 20 km/h becoming light late this evening. Low 12. Tuesday..Increasing cloudiness. 30 percent chance of showers late in the afternoon. Wind becoming east 20 km/h late in the morning. High 24. Humidex 27. UV index 7 or high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h. Low 16. Kingston - Odessa - Frontenac Islands. Tonight..Partly cloudy. Low 12. Tuesday..A mix of sun and cloud. Wind becoming southeast 20 km/h late in the morning. High 23. Humidex 26. UV index 8 or very high. Tuesday night..Cloudy with 60 percent chance of showers. Low 16. Lindsay - Southern Kawartha Lakes. Tonight..Partly cloudy. Low 10. Tuesday..A mix of sun and cloud. 30 percent chance of showers in the afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming east 20 km/h in the morning. High 24. Humidex 26. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h becoming light in the evening. Low 15. Fenelon Falls - Balsam Lake Park - Northern Kawartha Lakes. Tonight..Partly cloudy. Low 10. Tuesday..Mainly cloudy. 30 percent chance of showers in the afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming east 20 km/h in the morning. High 23. Humidex 25. UV index 7 or high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h becoming light in the evening. Low 15. Peterborough City - Lakefield - Southern Peterborough County. Tonight..Partly cloudy. Low 9. Tuesday..A mix of sun and cloud. 30 percent chance of showers in the afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming east 20 km/h in the morning. High 22. Humidex 25. UV index 8 or very high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h becoming light in the evening. Low 15. Apsley - Woodview - Northern Peterborough County. Tonight..Partly cloudy. Low 9. Tuesday..Mainly cloudy. 30 percent chance of showers in the afternoon then 70 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming east 20 km/h in the morning. High 22. Humidex 25. UV index 7 or high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h becoming light in the evening. Low 15. Stirling - Tweed - Madoc. Tonight..Partly cloudy. Wind northeast 20 km/h becoming light late this evening. Low 11. Tuesday..Mainly cloudy. 30 percent chance of showers late in the afternoon. Wind becoming east 20 km/h late in the morning. High 25. Humidex 27. UV index 7 or high. Tuesday night..Cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind east 20 km/h. Low 16. Tamworth - Sydenham - South Frontenac. Tonight..Partly cloudy. Low 11. Tuesday..A mix of sun and cloud. Wind becoming southeast 20 km/h late in the morning. High 25. Humidex 27. UV index 7 or high. Tuesday night..Cloudy with 60 percent chance of showers. Low 16. Kaladar - Bannockburn - Bon Echo Park. Tonight..Partly cloudy. Low 8. Tuesday..Mainly cloudy. Wind becoming southeast 20 km/h late in the morning. High 23. UV index 7 or high. Tuesday night..Cloudy with 60 percent chance of showers. Low 11. Bancroft - Hastings Highlands - Denbigh. Tonight..Partly cloudy. Low 8. Tuesday..Mainly cloudy. 40 percent chance of showers late in the afternoon. Wind becoming southeast 20 km/h in the morning. High 21. UV index 7 or high. Tuesday night..Cloudy with 40 percent chance of showers. Wind east 20 km/h becoming light in the evening. Low 10. Gananoque - Mallorytown. Tonight..Partly cloudy. Low 10. Tuesday..A mix of sun and cloud. Wind becoming southeast 20 km/h late in the morning. High 23. UV index 7 or high. Tuesday night..Cloudy with 60 percent chance of showers. Low 14. Brockville - Prescott. Tonight..Partly cloudy. Low 10. Tuesday..A mix of sun and cloud. Wind becoming southeast 20 km/h late in the morning. High 23. UV index 8 or very high. Tuesday night..Cloudy with 60 percent chance of showers. Low 14. Westport - Charleston Lake. Tonight..Partly cloudy. Low 10. Tuesday..A mix of sun and cloud. Wind becoming southeast 20 km/h late in the morning. High 25. Humidex 26. UV index 7 or high. Tuesday night..Cloudy with 60 percent chance of showers. Low 14. Merrickville-Wolford - Kemptville. Tonight..Partly cloudy. Low 9. Tuesday..A mix of sun and cloud. Wind becoming southeast 20 km/h late in the morning. High 23. UV index 8 or very high. Tuesday night..Cloudy with 60 percent chance of showers. Low 14. Ottawa North - Kanata - Orleans. Tonight..Partly cloudy. Low 11. Tuesday..A mix of sun and cloud. Wind becoming east 20 km/h in the morning. High 23. Humidex 25. UV index 8 or very high. Tuesday night..Cloudy. 60 percent chance of showers overnight. Wind east 20 km/h becoming light in the evening. Low 14. Ottawa South - Richmond - Metcalfe. Tonight..Partly cloudy. Low 10. Tuesday..A mix of sun and cloud. Wind becoming east 20 km/h in the morning. High 24. Humidex 26. UV index 8 or very high. Tuesday night..Cloudy. 60 percent chance of showers overnight. Wind east 20 km/h becoming light in the evening. Low 14. Gatineau. Tonight..Partly cloudy. Low 11. Tuesday..A mix of sun and cloud. Wind becoming east 20 km/h in the morning. High 23. Humidex 25. UV index 8 or very high. Tuesday night..Becoming cloudy in the evening. 60 percent chance of showers overnight. Wind east 20 km/h becoming light in the evening. Low 14. Prescott and Russell. Tonight..Partly cloudy. Low 10. Tuesday..A mix of sun and cloud. Wind becoming east 20 km/h in the morning. High 23. UV index 8 or very high. Tuesday night..Cloudy. 60 percent chance of showers overnight. Wind east 20 km/h becoming light in the evening. Low 12. Morrisburg - Long Sault. Tonight..Partly cloudy. Low 10. Tuesday..A mix of sun and cloud. Wind becoming east 20 km/h in the morning. High 23. UV index 8 or very high. Tuesday night..Cloudy. 60 percent chance of showers overnight. Wind east 20 km/h becoming light in the evening. Low 13. Cornwall - Lancaster. Tonight..Partly cloudy. Low 10. Tuesday..A mix of sun and cloud. Wind becoming east 20 km/h in the morning. High 23. UV index 8 or very high. Tuesday night..Becoming cloudy in the evening. 60 percent chance of showers overnight. Wind east 20 km/h becoming light in the evening. Low 13. Winchester - Newington. Tonight..Partly cloudy. Low 9. Tuesday..A mix of sun and cloud. Wind becoming east 20 km/h in the morning. High 23. UV index 8 or very high. Tuesday night..Cloudy. 60 percent chance of showers overnight. Wind east 20 km/h becoming light in the evening. Low 12. Maxville - Alexandria. Tonight..Partly cloudy. Low 9. Tuesday..A mix of sun and cloud. Wind becoming east 20 km/h in the morning. High 23. UV index 8 or very high. Tuesday night..Becoming cloudy in the evening. 60 percent chance of showers overnight. Wind east 20 km/h becoming light in the evening. Low 12. Plevna - Sharbot Lake - Western Lanark County. Tonight..Partly cloudy. Low 10. Tuesday..Mainly cloudy. Wind becoming southeast 20 km/h late in the morning. High 23. UV index 7 or high. Tuesday night..Cloudy with 60 percent chance of showers. Low 14. Smiths Falls - Perth - Eastern Lanark County. Tonight..Partly cloudy. Low 10. Tuesday..A mix of sun and cloud. Wind becoming southeast 20 km/h late in the morning. High 23. UV index 8 or very high. Tuesday night..Cloudy with 60 percent chance of showers. Low 14. Port Carling - Port Severn. Tonight..Partly cloudy. Low 12. Tuesday..Cloudy. 40 percent chance of showers in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming northeast 20 km/h late in the morning. High 22. Humidex 25. UV index 7 or high. Tuesday night..Cloudy with 40 percent chance of showers. Risk of a thunderstorm in the evening. Wind northeast 20 km/h becoming light in the evening. Low 13. Bracebridge - Gravenhurst. Tonight..Partly cloudy. Low 12. Tuesday..Cloudy. 40 percent chance of showers in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming northeast 20 km/h late in the morning. High 22. Humidex 25. UV index 6 or high. Tuesday night..Cloudy with 40 percent chance of showers. Risk of a thunderstorm in the evening. Wind northeast 20 km/h becoming light in the evening. Low 13. Town of Parry Sound - Rosseau - Killbear Park. Tonight..Partly cloudy. Low 12. Tuesday..Mainly cloudy. 40 percent chance of showers in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming northeast 20 km/h late in the morning. High 22. Humidex 25. UV index 6 or high. Tuesday night..Cloudy with 40 percent chance of showers. Risk of a thunderstorm in the evening. Wind northeast 20 km/h becoming light in the evening. Low 13. Huntsville - Baysville. Tonight..Partly cloudy. Low 12. Tuesday..A mix of sun and cloud. Becoming cloudy late in the morning with 40 percent chance of showers in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming northeast 20 km/h late in the morning. High 22. Humidex 25. UV index 7 or high. Tuesday night..Cloudy with 40 percent chance of showers. Risk of a thunderstorm in the evening. Wind northeast 20 km/h becoming light in the evening. Low 13. Haliburton - Minden - Southern Haliburton County. Tonight..Partly cloudy. Low 9. Tuesday..Mainly cloudy. 40 percent chance of showers in the afternoon. Risk of a thunderstorm late in the afternoon. Wind becoming northeast 20 km/h late in the morning. High 21. UV index 6 or high. Tuesday night..Cloudy with 40 percent chance of showers. Risk of a thunderstorm in the evening. Wind northeast 20 km/h becoming light in the evening. Low 11. Continued in next message... --- up 1 week, 8 hours, 16 minutes * Origin: Northern Realms (618:400/23) .