Subj : Southern Ontario Weather To : All From : Northern Realms Date : Sun May 19 2024 15:35:00 FPCN11 CWTO 191930 Forecasts for Southern Ontario and the National Capital Region issued by Environment Canada at 3:30 p.m. EDT Sunday 19 May 2024 for tonight Monday and Monday night. The next scheduled forecast will be issued at 5:00 a.m. EDT Monday. City of Toronto Vaughan - Richmond Hill - Markham Pickering - Oshawa - Southern Durham Region. Tonight..Partly cloudy. 30 percent chance of showers early this evening with risk of a thunderstorm. Fog patches developing after midnight. Low 14. Monday..Mainly sunny. Fog patches dissipating in the morning. High 21. UV index 8 or very high. Monday night..Partly cloudy. 30 percent chance of showers late in the evening and overnight. Low 15. Windsor - Essex - Chatham-Kent. Tonight..A few showers ending this evening then partly cloudy with 30 percent chance of showers. Risk of a thunderstorm early this evening. Fog patches developing after midnight. Low 14. Monday..A mix of sun and cloud. 30 percent chance of showers in the afternoon with risk of a thunderstorm. Fog patches dissipating in the morning. High 29. Humidex 30. UV index 9 or very high. Monday night..Partly cloudy with 30 percent chance of showers. Risk of a thunderstorm in the evening. Low 17. Sarnia - Petrolia - Western Lambton County. Tonight..A few showers ending early this evening then partly cloudy. Risk of a thunderstorm early this evening. Low 14. Monday..A mix of sun and cloud. 30 percent chance of showers in the afternoon with risk of a thunderstorm. High 21. UV index 8 or very high. Monday night..Partly cloudy with 40 percent chance of showers and risk of a thunderstorm. Low 15. Watford - Pinery Park - Eastern Lambton County Goderich - Bluewater - Southern Huron County. Tonight..Partly cloudy. 60 percent chance of showers early this evening with risk of a thunderstorm. Low 14. Monday..A mix of sun and cloud. 30 percent chance of showers in the afternoon with risk of a thunderstorm. High 21. UV index 8 or very high. Monday night..Partly cloudy with 40 percent chance of showers and risk of a thunderstorm. Low 15. Elgin. Tonight..Partly cloudy. 30 percent chance of showers early this evening with risk of a thunderstorm. Fog patches developing after midnight. Low 14. Monday..A mix of sun and cloud. 30 percent chance of showers in the afternoon with risk of a thunderstorm. Fog patches dissipating in the morning. High 29. Humidex 30. UV index 9 or very high. Monday night..Partly cloudy with 30 percent chance of showers. Risk of a thunderstorm in the evening. Low 17. London - Middlesex Oxford - Brant Caledon Stratford - Mitchell - Southern Perth County Kitchener - Cambridge - Region of Waterloo Guelph - Erin - Southern Wellington County. Tonight..Partly cloudy. 60 percent chance of showers early this evening with risk of a thunderstorm. Low 14. Monday..A mix of sun and cloud. 30 percent chance of showers in the afternoon with risk of a thunderstorm. High 21. UV index 8 or very high. Monday night..Partly cloudy with 30 percent chance of showers and risk of a thunderstorm. Low 15. Simcoe - Delhi - Norfolk Dunnville - Caledonia - Haldimand Niagara City of Hamilton. Tonight..A few clouds. Fog patches developing after midnight. Low 14. Monday..Mainly sunny. Fog patches dissipating in the morning. High 21. UV index 8 or very high. Monday night..Partly cloudy. 30 percent chance of showers overnight. Low 15. Burlington - Oakville Halton Hills - Milton Mississauga - Brampton. Tonight..Partly cloudy. 30 percent chance of showers early this evening with risk of a thunderstorm. Fog patches developing after midnight. Low 14. Monday..Mainly sunny. Fog patches dissipating in the morning. High 21. UV index 8 or very high. Monday night..Partly cloudy. 30 percent chance of showers overnight. Low 15. Newmarket - Georgina - Northern York Region Uxbridge - Beaverton - Northern Durham Region. Tonight..Partly cloudy. 40 percent chance of showers early this evening with risk of a thunderstorm. Low 14. Monday..A mix of sun and cloud. 30 percent chance of showers in the afternoon with risk of a thunderstorm. High 21. UV index 8 or very high. Monday night..Partly cloudy with 30 percent chance of showers. Risk of a thunderstorm early in the evening. Low 15. Wingham - Blyth - Northern Huron County Saugeen Shores - Kincardine - Southern Bruce County. Tonight..Partly cloudy. 30 percent chance of showers early this evening with risk of a thunderstorm. Low 14. Monday..A mix of sun and cloud. 40 percent chance of showers in the afternoon with risk of a thunderstorm. High 21. UV index 8 or very high. Monday night..Partly cloudy with 60 percent chance of showers and risk of a thunderstorm. Low 15. Listowel - Milverton - Northern Perth County Mount Forest - Arthur - Northern Wellington County Dufferin - Innisfil Hanover - Dundalk - Southern Grey County Owen Sound - Blue Mountains - Northern Grey County Barrie - Orillia - Midland. Tonight..Partly cloudy. 60 percent chance of showers early this evening with risk of a thunderstorm. Low 14. Monday..A mix of sun and cloud. 30 percent chance of showers in the afternoon with risk of a thunderstorm. High 21. UV index 8 or very high. Monday night..Partly cloudy with 40 percent chance of showers and risk of a thunderstorm. Low 15. Bruce Peninsula - Sauble Beach - Tobermory. Tonight..Partly cloudy. 30 percent chance of showers early this evening with risk of a thunderstorm. Low 14. Monday..A mix of sun and cloud. 40 percent chance of showers in the afternoon with risk of a thunderstorm. High 21. UV index 8 or very high. Monday night..Partly cloudy with 60 percent chance of showers and risk of a thunderstorm. Low 15. Belleville - Quinte - Northumberland. Tonight..Clear. Fog patches developing after midnight. Low 13. Monday..Sunny. Fog patches dissipating in the morning. High 30. UV index 8 or very high. Monday night..Clear. Becoming partly cloudy near midnight. Low 12. Kingston - Prince Edward Stirling - Tweed - South Frontenac Brockville - Leeds and Grenville. Tonight..Clear. Fog patches developing after midnight. Low 13. Monday..Sunny. Fog patches dissipating in the morning. High 30. UV index 8 or very high. Monday night..Clear. Becoming partly cloudy near midnight. Low 12. Peterborough - Kawartha Lakes Haliburton - Minden - Southern Haliburton County. Tonight..Partly cloudy. 30 percent chance of showers early this evening with risk of a thunderstorm. Low 14. Monday..Mainly sunny. High 21. UV index 8 or very high. Monday night..Partly cloudy. 30 percent chance of showers overnight. Low 15. Bancroft - Bon Echo Park Renfrew - Pembroke - Barry's Bay. Tonight..Partly cloudy with 30 percent chance of showers early this evening. Otherwise clear. Risk of a thunderstorm early this evening. Low 13. Monday..Sunny. High 30. UV index 8 or very high. Monday night..Clear in the evening then partly cloudy with 30 percent chance of showers overnight. Low 12. City of Ottawa Gatineau Prescott and Russell Cornwall - Morrisburg Smiths Falls - Lanark - Sharbot Lake. Tonight..Clear. Low 13. Monday..Sunny. High 30. UV index 8 or very high. Monday night..Clear. Becoming partly cloudy near midnight. Low 12. Parry Sound - Muskoka. Tonight..Partly cloudy. 30 percent chance of showers early this evening with risk of a thunderstorm. Low 14. Monday..Mainly sunny. High 21. UV index 8 or very high. Monday night..Partly cloudy. 60 percent chance of showers late in the evening and overnight with risk of a thunderstorm. Low 15. Oxtongue Lake - Fort Irwin - Northern Haliburton County Deep River - Whitney - Eastern Algonquin Park. Tonight..Partly cloudy. 30 percent chance of showers early this evening with risk of a thunderstorm. Low 14. Monday..Mainly sunny. High 21. UV index 8 or very high. Monday night..Partly cloudy. 40 percent chance of showers overnight with risk of a thunderstorm. Low 15. Western Algonquin Park - Lake of Two Rivers Burk's Falls - Bayfield Inlet. Tonight..Partly cloudy with 30 percent chance of showers early this evening. Otherwise clear. Risk of a thunderstorm early this evening. Low 8. Monday..Sunny. High 27. UV index 8 or very high. Monday night..Increasing cloudiness. 60 percent chance of showers late in the evening and overnight with risk of a thunderstorm. Low 13. End $$$$^^ --- up 5 days, 23 hours, 25 minutes * Origin: Northern Realms (1:229/664) .