Subj : Southern Ontario Weather
To   : All
From : Northern Realms
Date : Sun May 11 2025 11:05:00

FPCN11 CWTO 111500
Forecasts for Southern Ontario and the National Capital Region issued
by Environment Canada at 11:00 a.m. EDT Sunday 11 May 2025 for today
and Monday.
The next scheduled forecast will be issued at 3:30 p.m. EDT.

City of Toronto.
Today..Sunny. Wind east 20 km/h becoming light this afternoon.
 High 14. UV index 7 or high.
Tonight..Clear. Low plus 5.
Monday..Sunny. High 23. Humidex 25.

Windsor - Leamington - Essex County.
Today..Sunny. Wind northeast 20 km/h becoming light late this
 afternoon. High 19. UV index 8 or very high.
Tonight..Clear. Low 8.
Monday..Sunny. Becoming a mix of sun and cloud late in the afternoon.
 Wind becoming southeast 30 km/h gusting to 50 in the afternoon.
 High 26. Humidex 28.

Chatham-Kent - Rondeau Park.
Today..Sunny. Wind east 30 km/h. High 19. UV index 8 or very high.
Tonight..Clear. Wind east 20 km/h becoming light this evening. Low 8.
Monday..Sunny. Increasing cloudiness late in the afternoon. Wind
 becoming southeast 30 km/h late in the afternoon. High 25. Humidex
 27.

Sarnia - Petrolia - Western Lambton County.
Today..Sunny. High 18. UV index 8 or very high.
Tonight..Clear. Low 6.
Monday..Sunny. Wind becoming southeast 20 km/h late in the afternoon.
 High 26. Humidex 28.

Watford - Pinery Park - Eastern Lambton County.
Today..Sunny. High 20 except 13 near Lake Huron. UV index 8 or very
 high.
Tonight..Clear. Low plus 5.
Monday..Sunny. High 25. Humidex 26.

Rodney - Shedden - Western Elgin County.
Today..Sunny. High 18. UV index 8 or very high.
Tonight..Clear. Low 7.
Monday..Sunny. Wind becoming southeast 30 km/h late in the afternoon.
 High 23. Humidex 25.

St. Thomas - Aylmer - Eastern Elgin County.
Today..Sunny. High 18. UV index 8 or very high.
Tonight..Clear. Low 7.
Monday..Sunny. High 25.

Strathroy - Komoka - Western Middlesex County.
Today..Sunny. High 20. UV index 8 or very high.
Tonight..Clear. Low 6.
Monday..Sunny. Wind becoming south 20 km/h late in the afternoon.
 High 25. Humidex 26.

London - Parkhill - Eastern Middlesex County.
Today..Sunny. Wind east 20 km/h becoming light late this afternoon.
 High 18. UV index 8 or very high.
Tonight..Clear. Low 6.
Monday..Sunny. High 26.

Simcoe - Delhi - Norfolk.
Today..Sunny. High 17. UV index 8 or very high.
Tonight..Clear. Low plus 4.
Monday..Sunny. Wind becoming southeast 20 km/h late in the afternoon.
 High 25. Humidex 26.

Dunnville - Caledonia - Haldimand.
Today..Sunny. Wind northeast 20 km/h becoming light this afternoon.
 High 15. UV index 8 or very high.
Tonight..Clear. Low plus 5.
Monday..Sunny. High 25. Humidex 28.

Woodstock - Tillsonburg - Oxford County.
Today..Sunny. High 18. UV index 8 or very high.
Tonight..Clear. Low plus 4.
Monday..Sunny. Wind becoming southeast 20 km/h late in the afternoon.
 High 25. Humidex 27.

Brantford - County of Brant.
Today..Sunny. High 16. UV index 8 or very high.
Tonight..Clear. Low plus 3 with risk of frost.
Monday..Sunny. High 25. Humidex 27.

Niagara Falls - Welland - Southern Niagara Region.
Today..Sunny. High 14. UV index 8 or very high.
Tonight..Clear. Low 7.
Monday..Sunny. High 24. Humidex 26.

St. Catharines - Grimsby - Northern Niagara Region.
Today..Sunny. Wind northeast 20 km/h becoming light this afternoon.
 High 14. UV index 7 or high.
Tonight..Clear. Low plus 5.
Monday..Sunny. High 23. Humidex 26.

City of Hamilton.
Today..Sunny. Wind northeast 30 km/h becoming light late this
 afternoon. High 13. UV index 8 or very high.
Tonight..Clear. Low plus 4 with temperature rising to 10 by morning.
Monday..Sunny. High 24. Humidex 26.

Burlington - Oakville.
Today..Sunny. Wind northeast 20 km/h becoming light this afternoon.
 High 11. UV index 7 or high.
Tonight..Clear. Low plus 5.
Monday..Sunny. High 20.

Halton Hills - Milton.
Today..Sunny. High 16. UV index 7 or high.
Tonight..Clear. Low plus 3 with risk of frost.
Monday..Sunny. High 25. Humidex 27.

Mississauga - Brampton.
Today..Sunny. Wind east 20 km/h becoming light this afternoon.
 High 15. UV index 7 or high.
Tonight..Clear. Low plus 4.
Monday..Sunny. High 24. Humidex 26.

Caledon.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Low plus 3 with risk of frost.
Monday..Sunny. High 25. Humidex 27.

Vaughan - Richmond Hill - Markham.
Today..Sunny. High 15. UV index 7 or high.
Tonight..Clear. Low plus 4.
Monday..Sunny. High 24.

Newmarket - Georgina - Northern York Region.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Low plus 3 with risk of frost.
Monday..Sunny. High 25.

Pickering - Oshawa - Southern Durham Region.
Today..Sunny. High 13. UV index 7 or high.
Tonight..Clear. Low plus 4.
Monday..Sunny. High 23.

Uxbridge - Beaverton - Northern Durham Region.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Low plus 3 with risk of frost.
Monday..Sunny. High 25. Humidex 26.

Goderich - Bluewater - Southern Huron County.
Today..Sunny. High 18. UV index 7 or high.
Tonight..Clear. Wind southeast 20 km/h becoming light after midnight.
 Low plus 5.
Monday..Sunny. High 25. Humidex 27.

Wingham - Blyth - Northern Huron County.
Today..Sunny. High 18. UV index 7 or high.
Tonight..Clear. Low plus 5.
Monday..Sunny. High 25. Humidex 27.

Stratford - Mitchell - Southern Perth County.
Today..Sunny. Wind becoming east 20 km/h late this afternoon.
 High 18. UV index 7 or high.
Tonight..Clear. Wind east 20 km/h becoming light this evening. Low
 plus 5.
Monday..Sunny. Wind becoming southeast 20 km/h late in the afternoon.
 High 26. Humidex 28.

Listowel - Milverton - Northern Perth County.
Today..Sunny. High 18. UV index 7 or high.
Tonight..Clear. Low plus 5.
Monday..Sunny. High 25. Humidex 27.

Kitchener - Cambridge - Region of Waterloo.
Today..Sunny. Wind east 20 km/h becoming light late this afternoon.
 High 16. UV index 7 or high.
Tonight..Clear. Low plus 3 with risk of frost.
Monday..Sunny. High 25. Humidex 28.

Guelph - Erin - Southern Wellington County.
Today..Sunny. High 16. UV index 7 or high.
Tonight..Clear. Low plus 3 with risk of frost.
Monday..Sunny. High 25. Humidex 28.

Mount Forest - Arthur - Northern Wellington County.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Low plus 4.
Monday..Sunny. High 25. Humidex 27.

Orangeville - Grand Valley - Southern Dufferin County.
Today..Sunny. High 16. UV index 7 or high.
Tonight..Clear. Low plus 4.
Monday..Sunny. High 25.

Shelburne - Mansfield - Northern Dufferin County.
Today..Sunny. High 16. UV index 7 or high.
Tonight..Clear. Low plus 4.
Monday..Sunny. High 25.

Innisfil - New Tecumseth - Angus.
Today..Sunny. Wind becoming south 20 km/h late this afternoon.
 High 17. UV index 7 or high.
Tonight..Clear. Wind south 20 km/h becoming light this evening. Low
 plus 2.
Monday..Sunny. High 25. Humidex 28.

Saugeen Shores - Kincardine - Southern Bruce County.
Today..Sunny. Wind northwest 20 km/h becoming light this afternoon.
 High 17. UV index 7 or high.
Tonight..Clear. Low 6.
Monday..Sunny. High 23.

Bruce Peninsula - Sauble Beach - Tobermory.
Today..Sunny. Wind east 20 km/h becoming light late this afternoon.
 High 13. UV index 7 or high.
Tonight..Clear. Wind becoming south 20 km/h late this evening. Low 6.
Monday..Sunny. High 19.

Hanover - Dundalk - Southern Grey County.
Today..Sunny. High 19. UV index 7 or high.
Tonight..Clear. Low 6.
Monday..Sunny. High 25.

Owen Sound - Blue Mountains - Northern Grey County.
Today..Sunny. Wind east 20 km/h becoming light this afternoon.
 High 15. UV index 7 or high.
Tonight..Clear. Low 6.
Monday..Sunny. High 23.

Barrie - Collingwood - Hillsdale.
Today..Sunny. Wind becoming south 20 km/h late this afternoon.
 High 16. UV index 7 or high.
Tonight..Clear. Wind south 20 km/h becoming light this evening. Low
 plus 4.
Monday..Sunny. High 22.

Midland - Coldwater - Orr Lake.
Today..Sunny. High 15. UV index 7 or high.
Tonight..Clear. Wind south 20 km/h becoming light late this evening.
 Low plus 5.
Monday..Sunny. High 22.

Orillia - Lagoon City - Washago.
Today..Sunny. High 15. UV index 7 or high.
Tonight..Clear. Wind southeast 20 km/h becoming light late this
 evening. Low plus 5.
Monday..Sunny. High 24. Humidex 25.

Cobourg - Colborne - Western Northumberland County.
Today..Sunny. High 15. UV index 7 or high.
Tonight..Clear. Low plus 3 with risk of frost.
Monday..Sunny. High 21.

Belleville - Quinte West - Eastern Northumberland County.
Today..Sunny. High 16. UV index 7 or high.
Tonight..Clear. Low plus 3 with risk of frost.
Monday..Sunny. High 21.

Picton - Sandbanks Park.
Today..Sunny. High 14. UV index 7 or high.
Tonight..Clear. Low plus 5.
Monday..Sunny. High 19.

Napanee - Consecon.
Today..Sunny. High 15. UV index 7 or high.
Tonight..Clear. Low plus 4.
Monday..Sunny. High 21.

Kingston - Odessa - Frontenac Islands.
Today..Sunny. High 15. UV index 7 or high.
Tonight..Clear. Low plus 4.
Monday..Sunny. High 21.

Lindsay - Southern Kawartha Lakes.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Low plus 3.
Monday..Sunny. High 25.

Fenelon Falls - Balsam Lake Park - Northern Kawartha Lakes.
Today..Sunny. High 18. UV index 7 or high.
Tonight..Clear. Low plus 3.
Monday..Sunny. High 25.

Peterborough City - Lakefield - Southern Peterborough County.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Low plus 3.
Monday..Sunny. High 25.

Apsley - Woodview - Northern Peterborough County.
Today..Sunny. High 18. UV index 7 or high.
Tonight..Clear. Low plus 3.
Monday..Sunny. Wind becoming southwest 20 km/h late in the morning.
 High 25.

Stirling - Tweed - Madoc.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Low plus 3 with risk of frost.
Monday..Sunny. Wind becoming southwest 20 km/h late in the morning.
 High 25. Humidex 26.

Tamworth - Sydenham - South Frontenac.
Today..Sunny. Wind north 20 km/h becoming light this afternoon.
 High 17. UV index 7 or high.
Tonight..Clear. Low plus 3 with risk of frost.
Monday..Sunny. Wind south 20 km/h becoming light late in the morning.
 High 24. Humidex 25.

Kaladar - Bannockburn - Bon Echo Park.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Low plus 2.
Monday..Sunny. Wind becoming southwest 20 km/h late in the morning.
 High 25.

Bancroft - Hastings Highlands - Denbigh.
Today..Sunny. High 16. UV index 7 or high.
Tonight..Clear. Low plus 2.
Monday..Sunny. Wind becoming southwest 20 km/h in the morning.
 High 26.

Gananoque - Mallorytown.
Today..Sunny. Wind north 20 km/h becoming light this afternoon.
 High 16. UV index 7 or high.
Tonight..Clear. Low plus 4.
Monday..Sunny. Wind becoming southwest 20 km/h gusting to 40 in the
 morning. High 23.

Brockville - Prescott.
Today..Sunny. High 15. UV index 7 or high.
Tonight..Clear. Low plus 4.
Monday..Sunny. Wind becoming southwest 20 km/h gusting to 40 in the
 morning. High 24.

Westport - Charleston Lake.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Low plus 4.
Monday..Sunny. Wind becoming southwest 20 km/h in the morning.
 High 24.

Merrickville-Wolford - Kemptville.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Becoming partly cloudy near midnight. Low plus 4.
Monday..Sunny. Wind becoming southwest 20 km/h in the morning.
 High 24.

Ottawa North - Kanata - Orl‚ans.
Today..Sunny. High 17. UV index 6 or high.
Tonight..Clear. Increasing cloudiness late this evening. Low plus 5.
Monday..A mix of sun and cloud. Clearing near noon. Wind becoming
 southwest 20 km/h gusting to 40 in the morning. High 23.

Ottawa South - Richmond - Metcalfe.
Today..Sunny. Wind northwest 20 km/h becoming light this afternoon.
 High 17. UV index 6 or high.
Tonight..Clear. Increasing cloudiness late this evening. Low plus 5.
Monday..A mix of sun and cloud. Clearing near noon. Wind becoming
 southwest 20 km/h gusting to 40 in the morning. High 24.

Gatineau.
Today..Sunny. High 17. UV index 6 or high.
Tonight..Increasing cloudiness. Low plus 5.
Monday..A mix of sun and cloud. High 23.

Prescott and Russell.
Today..Sunny. Wind northwest 20 km/h becoming light this afternoon.
 High 17. UV index 6 or high.
Tonight..Clear. Increasing cloudiness late this evening. Low plus 5.
Monday..A mix of sun and cloud. Clearing near noon. Wind becoming
 southwest 20 km/h late in the morning. High 23.

Morrisburg - Long Sault.
Today..Sunny. Wind northwest 20 km/h becoming light this afternoon.
 High 16. UV index 7 or high.
Tonight..Clear. Becoming partly cloudy near midnight. Low plus 5.
Monday..A mix of sun and cloud. Clearing near noon. Wind becoming
 southwest 20 km/h gusting to 40 in the morning. High 23.

Cornwall - Lancaster.
Today..Sunny. Wind becoming west 20 km/h this afternoon. High 16. UV
 index 7 or high.
Tonight..Clear. Increasing cloudiness near midnight. Low plus 5.
Monday..A mix of sun and cloud. Clearing near noon. Wind becoming
 west 20 km/h gusting to 40 in the morning. High 23.

Winchester - Newington.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Becoming partly cloudy near midnight. Low plus 5.
Monday..A mix of sun and cloud. Clearing near noon. Wind becoming
 southwest 20 km/h gusting to 40 in the morning. High 23.

Maxville - Alexandria.
Today..Sunny. Wind west 20 km/h. High 17. UV index 7 or high.
Tonight..Clear. Increasing cloudiness near midnight. Low plus 5.
Monday..A mix of sun and cloud. Clearing near noon. Wind becoming
 west 20 km/h gusting to 40 in the morning. High 23.

Plevna - Sharbot Lake - Western Lanark County.
Today..Sunny. Wind northeast 20 km/h becoming light this afternoon.
 High 17. UV index 7 or high.
Tonight..Clear. Low plus 3 with risk of frost.
Monday..Sunny. Wind becoming southwest 20 km/h in the morning.
 High 25.

Smiths Falls - Perth - Eastern Lanark County.
Today..Sunny. Wind north 20 km/h becoming light this afternoon.
 High 17. UV index 7 or high.
Tonight..Clear. Becoming partly cloudy near midnight. Low plus 4.
Monday..A mix of sun and cloud. Becoming sunny near noon. Wind
 becoming southwest 20 km/h gusting to 40 in the morning. High 25.

Port Carling - Port Severn.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Low plus 5.
Monday..Sunny. High 22.

Bracebridge - Gravenhurst.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Low plus 4.
Monday..Sunny. High 24.

Town of Parry Sound - Rosseau - Killbear Park.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Wind south 20 km/h becoming light after midnight. Low
 plus 4.
Monday..Sunny. High 22.

Huntsville - Baysville.
Today..Sunny. High 18. UV index 7 or high.
Tonight..Clear. Low plus 4.
Monday..Sunny. High 23.

Haliburton - Minden - Southern Haliburton County.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Low plus 3.
Monday..Sunny. High 24.

Oxtongue Lake - Fort Irwin - Northern Haliburton County.
Today..Sunny. High 17. UV index 7 or high.
Tonight..Clear. Low plus 3.
Monday..Sunny. Wind becoming southwest 20 km/h in the morning.
 High 24.

Barry's Bay - Killaloe.
Today..A mix of sun and cloud. High 16. UV index 7 or high.
Tonight..Clear. Becoming partly cloudy near midnight. Low plus 5.
Monday..A mix of sun and cloud. Becoming sunny near noon. Wind
 southwest 20 km/h. High 25.

Renfrew - Arnprior - Calabogie.
Today..A mix of sun and cloud. High 17. UV index 7 or high.
Tonight..Clear. Becoming partly cloudy near midnight. Low plus 5.
Monday..A mix of sun and cloud. Becoming sunny near noon. Wind
 becoming west 20 km/h late in the morning. High 24.

Petawawa - Pembroke - Cobden.
Today..A mix of sun and cloud. High 16. UV index 7 or high.
Tonight..Clear. Becoming partly cloudy this evening. Low plus 5.
Monday..Clearing. High 24.

Western Algonquin Park - Lake of Two Rivers.
Today..A mix of sun and cloud. High 17. UV index 7 or high.
Tonight..Clear. Low 6.
Monday..Sunny. Wind southwest 20 km/h becoming light late in the
 morning. High 23.

Deep River - Whitney - Eastern Algonquin Park.
Today..A mix of sun and cloud. High 15. UV index 7 or high.
Tonight..Clear. Low 6.
Monday..Sunny. Wind becoming southwest 20 km/h in the morning.
 High 24.

Bayfield Inlet - Dunchurch.
Today..Sunny. High 18. UV index 7 or high.
Tonight..Clear. Low plus 5.
Monday..Sunny. High 22.

South River - Burk's Falls.
Today..A mix of sun and cloud. High 18. UV index 7 or high.
Tonight..Clear. Low plus 5.
Monday..Sunny. High 23.

End
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