FPCN11 CWTO 011930
Forecasts for Southern Ontario and the National Capital Region issued
by Environment Canada at 3:30 p.m. EDT Wednesday 1 October 2025 for
tonight Thursday and Thursday night.
The next scheduled forecast will be issued at 5:00 a.m. EDT Thursday.

City of Toronto.
Tonight..Clear. Low 9.
Thursday..Mainly sunny. High 21. UV index 6 or high.
Thursday night..A few clouds. Low 11.

Windsor - Leamington - Essex County.
Tonight..Clear. Low 11.
Thursday..Mainly sunny. High 23. Humidex 25. UV index 6 or high.
Thursday night..A few clouds. Low 13.

Chatham-Kent - Rondeau Park.
Tonight..Clear. Low 8.
Thursday..Mainly sunny. High 23. Humidex 25. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear after midnight. Low 13.

Sarnia - Petrolia - Western Lambton County.
Tonight..Clear. Low 8.
Thursday..Mainly sunny. High 23. Humidex 25. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear after midnight. Low 9.

Watford - Pinery Park - Eastern Lambton County.
Tonight..Clear. Low 8.
Thursday..Mainly sunny. High 23. Humidex 25. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear after midnight. Low 9.

Rodney - Shedden - Western Elgin County.
Tonight..Clear. Low 8.
Thursday..Mainly sunny. High 21. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear after midnight. Low 12.

St. Thomas - Aylmer - Eastern Elgin County.
Tonight..Clear. Low 8.
Thursday..Mainly sunny. High 21. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear after midnight. Low 12.

Strathroy - Komoka - Western Middlesex County.
Tonight..Clear. Low 8.
Thursday..Mainly sunny. High 22. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear after midnight. Low 10.

London - Parkhill - Eastern Middlesex County.
Tonight..Clear. Low 8.
Thursday..Mainly sunny. High 22. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear after midnight. Low 10.

Simcoe - Delhi - Norfolk.
Tonight..Clear. Low 6.
Thursday..Mainly sunny. High 22. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear after midnight. Low 9.

Dunnville - Caledonia - Haldimand.
Tonight..Clear. Low 7.
Thursday..Mainly sunny. High 21. UV index 6 or high.
Thursday night..A few clouds. Low 9.

Woodstock - Tillsonburg - Oxford County.
Tonight..Clear. Low 6.
Thursday..Mainly sunny. High 21. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear after midnight. Low 8.

Brantford - County of Brant.
Tonight..Clear. Low 6.
Thursday..Mainly sunny. High 21. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear after midnight. Low 8.

Niagara Falls - Welland - Southern Niagara Region.
Tonight..Clear. Low 9.
Thursday..Mainly sunny. High 21. UV index 6 or high.
Thursday night..A few clouds. Low 15.

St. Catharines - Grimsby - Northern Niagara Region.
Tonight..Clear. Low 9.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..A few clouds. Low 11.

City of Hamilton.
Tonight..Clear. Wind northeast 20 km/h becoming light early this
 evening. Low 9.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..A few clouds. Low 9.

Burlington - Oakville.
Tonight..Clear. Low 9.
Thursday..Mainly sunny. High 21. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Halton Hills - Milton.
Tonight..Clear. Low 9.
Thursday..Mainly sunny. High 21. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Mississauga - Brampton.
Tonight..Clear. Low 9.
Thursday..Mainly sunny. High 21. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Caledon.
Tonight..Clear. Low plus 5.
Thursday..Mainly sunny. High 21. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Vaughan - Richmond Hill - Markham.
Tonight..Clear. Low 9.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Newmarket - Georgina - Northern York Region.
Tonight..Clear. Low 6.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Pickering - Oshawa - Southern Durham Region.
Tonight..Clear. Low 9.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Uxbridge - Beaverton - Northern Durham Region.
Tonight..Clear. Low 6.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Goderich - Bluewater - Southern Huron County.
Tonight..Clear. Low 7.
Thursday..Mainly sunny. High 23. UV index 6 or high.
Thursday night..A few clouds. Low 8.

Wingham - Blyth - Northern Huron County.
Tonight..Clear. Low 7.
Thursday..Mainly sunny. High 23. UV index 6 or high.
Thursday night..A few clouds. Low 8.

Stratford - Mitchell - Southern Perth County.
Tonight..Clear. Low 7.
Thursday..Mainly sunny. High 22. UV index 6 or high.
Thursday night..A few clouds. Low 8.

Listowel - Milverton - Northern Perth County.
Tonight..Clear. Low 7.
Thursday..Mainly sunny. High 22. UV index 6 or high.
Thursday night..A few clouds. Low 8.

Kitchener - Cambridge - Region of Waterloo.
Tonight..Clear. Low plus 5.
Thursday..Mainly sunny. High 21. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Guelph - Erin - Southern Wellington County.
Tonight..Clear. Low plus 5.
Thursday..Mainly sunny. High 21. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Mount Forest - Arthur - Northern Wellington County.
Tonight..Clear. Low 6.
Thursday..Mainly sunny. High 21. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear near midnight. Low 7.

Orangeville - Grand Valley - Southern Dufferin County.
Tonight..Clear. Low 6.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear near midnight. Low
 plus 5.

Shelburne - Mansfield - Northern Dufferin County.
Tonight..Clear. Low 6.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear near midnight. Low
 plus 5.

Innisfil - New Tecumseth - Angus.
Tonight..Clear. Low 6.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..A few clouds. Low plus 5.

Saugeen Shores - Kincardine - Southern Bruce County.
Tonight..Clear. Low 7.
Thursday..Mainly sunny. High 21. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear near midnight. Low 11.

Bruce Peninsula - Sauble Beach - Tobermory.
Tonight..Clear. Low 8.
Thursday..Mainly sunny. High 17. UV index 5 or moderate.
Thursday night..Clear. Low 12.

Hanover - Dundalk - Southern Grey County.
Tonight..Clear. Low 6.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear near midnight. Low 10.

Owen Sound - Blue Mountains - Northern Grey County.
Tonight..Clear. Low 7.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..Partly cloudy. Becoming clear near midnight. Low 10.

Barrie - Collingwood - Hillsdale.
Tonight..Clear. Low 6.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..A few clouds. Low 8.

Midland - Coldwater - Orr Lake.
Tonight..Clear. Low 6.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..A few clouds. Low 8.

Orillia - Lagoon City - Washago.
Tonight..Clear. Low 6.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..A few clouds. Low 11.

Cobourg - Colborne - Western Northumberland County.
Tonight..Clear. Low plus 5.
Thursday..Mainly sunny. High 19. UV index 6 or high.
Thursday night..A few clouds. Low 9.

Belleville - Quinte West - Eastern Northumberland County.
Tonight..Clear. Low plus 5.
Thursday..Mainly sunny. High 19. UV index 6 or high.
Thursday night..A few clouds. Low 9.

Picton - Sandbanks Park.
Tonight..Clear. Low 7.
Thursday..Mainly sunny. High 19. UV index 6 or high.
Thursday night..A few clouds. Low 9.

Napanee - Consecon.
Tonight..Clear. Low plus 5.
Thursday..Mainly sunny. High 19. UV index 6 or high.
Thursday night..A few clouds. Low 9.

Kingston - Odessa - Frontenac Islands.
Tonight..Clear. Low plus 5.
Thursday..Mainly sunny. High 19. UV index 6 or high.
Thursday night..A few clouds. Low 9.

Lindsay - Southern Kawartha Lakes.
Tonight..Clear. Low plus 3 with risk of frost.
Thursday..Mainly sunny. High 19. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Fenelon Falls - Balsam Lake Park - Northern Kawartha Lakes.
Tonight..Clear. Low plus 2 with risk of frost.
Thursday..Mainly sunny. High 19. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Peterborough City - Lakefield - Southern Peterborough County.
Tonight..Clear. Low plus 3 with risk of frost.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..A few clouds. Fog patches developing before morning.
 Low plus 4.

Apsley - Woodview - Northern Peterborough County.
Tonight..Clear. Low plus 2 with risk of frost.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..A few clouds. Fog patches developing before morning.
 Low plus 4.

Stirling - Tweed - Madoc.
Tonight..Clear. Low plus 3 with risk of frost.
Thursday..Mainly sunny. High 18. UV index 6 or high.
Thursday night..A few clouds. Low 6.

Tamworth - Sydenham - South Frontenac.
Tonight..Clear. Low plus 3 with risk of frost.
Thursday..Mainly sunny. High 18. UV index 6 or high.
Thursday night..A few clouds. Low 6.

Kaladar - Bannockburn - Bon Echo Park.
Tonight..Clear. Low plus 1.
Thursday..Mainly sunny. High 18. UV index 6 or high.
Thursday night..A few clouds. Low plus 5.

Bancroft - Hastings Highlands - Denbigh.
Tonight..Clear. Low plus 1.
Thursday..Mainly sunny. High 18. UV index 6 or high.
Thursday night..A few clouds. Low plus 3.

Gananoque - Mallorytown.
Tonight..Clear. Low plus 3 with risk of frost.
Thursday..Mainly sunny. High 19. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Brockville - Prescott.
Tonight..Clear. Low plus 2 with frost.
Thursday..Mainly sunny. High 19. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Westport - Charleston Lake.
Tonight..Clear. Low plus 3 with risk of frost.
Thursday..Mainly sunny. High 19. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Merrickville-Wolford - Kemptville.
Tonight..Clear. Low plus 2 with frost.
Thursday..Mainly sunny. High 19. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Ottawa North - Kanata - Orl�ans.
Tonight..Clear. Low plus 2 with frost.
Thursday..Mainly sunny. High 19. UV index 5 or moderate.
Thursday night..Clear. Low 6.

Ottawa South - Richmond - Metcalfe.
Tonight..Clear. Low plus 2 with frost.
Thursday..Mainly sunny. High 19. UV index 5 or moderate.
Thursday night..A few clouds. Low 6.

Gatineau.
Tonight..Clear. Low plus 2 with frost.
Thursday..Mainly sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Prescott and Russell.
Tonight..Clear. Low plus 1 with frost.
Thursday..Mainly sunny. High 18. UV index 5 or moderate.
Thursday night..A few clouds. Low plus 5.

Morrisburg - Long Sault.
Tonight..Clear. Low plus 2 with risk of frost.
Thursday..Mainly sunny. High 18. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Cornwall - Lancaster.
Tonight..Clear. Low plus 1 with frost.
Thursday..Mainly sunny. High 18. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Winchester - Newington.
Tonight..Clear. Low plus 2 with risk of frost.
Thursday..Mainly sunny. High 18. UV index 6 or high.
Thursday night..A few clouds. Low 7.

Maxville - Alexandria.
Tonight..Clear. Low plus 1 with frost.
Thursday..Mainly sunny. High 18. UV index 5 or moderate.
Thursday night..A few clouds. Low 6 with temperature rising to 9 by
 morning.

Plevna - Sharbot Lake - Western Lanark County.
Tonight..Clear. Low plus 2 with risk of frost.
Thursday..Mainly sunny. High 18. UV index 6 or high.
Thursday night..A few clouds. Low 6.

Smiths Falls - Perth - Eastern Lanark County.
Tonight..Clear. Low plus 3 with risk of frost.
Thursday..Mainly sunny. High 18. UV index 6 or high.
Thursday night..A few clouds. Low 6.

Port Carling - Port Severn.
Tonight..A few clouds. Low plus 5.
Thursday..Mainly sunny. High 20. UV index 5 or moderate.
Thursday night..A few clouds. Low 10.

Bracebridge - Gravenhurst.
Tonight..A few clouds. Low plus 3.
Thursday..Mainly sunny. High 20. UV index 6 or high.
Thursday night..A few clouds. Low plus 5.

Town of Parry Sound - Rosseau - Killbear Park.
Tonight..A few clouds. Low plus 5.
Thursday..Mainly sunny. High 19. UV index 5 or moderate.
Thursday night..A few clouds. Low 7.

Huntsville - Baysville.
Tonight..A few clouds. Low plus 3.
Thursday..Mainly sunny. High 19. UV index 5 or moderate.
Thursday night..A few clouds. Low 7.

Haliburton - Minden - Southern Haliburton County.
Tonight..Clear. Low plus 1.
Thursday..Mainly sunny. High 18. UV index 6 or high.
Thursday night..A few clouds. Low 6.

Oxtongue Lake - Fort Irwin - Northern Haliburton County.
Tonight..Clear. Low plus 1.
Thursday..Mainly sunny. High 18. UV index 6 or high.
Thursday night..A few clouds. Low 6.

Barry's Bay - Killaloe.
Tonight..Clear. Low plus 1.
Thursday..Mainly sunny. High 18. UV index 5 or moderate.
Thursday night..A few clouds. Low 6.

Renfrew - Arnprior - Calabogie.
Tonight..Clear. Low plus 1.
Thursday..Mainly sunny. High 18. UV index 5 or moderate.
Thursday night..A few clouds. Low 6.

Petawawa - Pembroke - Cobden.
Tonight..Clear. Low plus 1.
Thursday..Mainly sunny. High 18. UV index 5 or moderate.
Thursday night..A few clouds. Low 6.

Western Algonquin Park - Lake of Two Rivers.
Tonight..Clear. Low plus 1.
Thursday..Mainly sunny. High 18. UV index 5 or moderate.
Thursday night..A few clouds. Low plus 3.

Deep River - Whitney - Eastern Algonquin Park.
Tonight..Clear. Low plus 1.
Thursday..Mainly sunny. High 18. UV index 5 or moderate.
Thursday night..A few clouds. Low plus 3.

Bayfield Inlet - Dunchurch.
Tonight..A few clouds. Low plus 5.
Thursday..Mainly sunny. High 18. UV index 5 or moderate.
Thursday night..A few clouds. Low 7.

South River - Burk's Falls.
Tonight..A few clouds. Low plus 3.
Thursday..Mainly sunny. High 18. UV index 5 or moderate.
Thursday night..A few clouds. Low 7.

End
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--- up 3 days, 7 hours, 18 minutes
 * Origin: Northern Realms (618:400/23)