FPCN11 CWTO 231930
Forecasts for Southern Ontario and the National Capital Region issued
by Environment Canada at 3:30 p.m. EDT Wednesday 23 September 2026
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. Wind east 20 km/h gusting to 40 becoming light after
 midnight. Low 8.
Thursday..Sunny. Wind becoming east 20 km/h in the morning. High 19.
 UV index 5 or moderate.
Thursday night..Clear. Low plus 5.

Windsor - Leamington - Essex County.
Tonight..Partly cloudy. 40 percent chance of showers early this
 evening. Wind east 30 km/h becoming light late this evening. Low 10.
Thursday..A mix of sun and cloud. Becoming sunny late in the morning.
 Wind becoming east 20 km/h in the morning. High 20. UV index 6 or
 high.
Thursday night..Clear. Low 10.

Chatham-Kent - Rondeau Park.
Tonight..Partly cloudy. 60 percent chance of showers early this
 evening. Clearing near midnight. Wind northeast 20 km/h gusting to
 50 becoming southeast 20 late this evening then light after
 midnight. Low 10.
Thursday..Sunny. Wind becoming east 30 km/h in the morning. High 20.
 UV index 6 or high.
Thursday night..Clear. Low plus 5.

Sarnia - Petrolia - Western Lambton County.
Tonight..Clearing early this evening. Wind east 20 km/h gusting to
 40. Low 8.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Watford - Pinery Park - Eastern Lambton County.
Tonight..Clearing early this evening. Wind northeast 20 km/h becoming
 light this evening. Low 8.
Thursday..Sunny. Wind becoming northeast 20 km/h late in the morning.
 High 20. UV index 5 or moderate.
Thursday night..Clear. Wind northeast 20 km/h becoming light in the
 evening. Low plus 4.

Rodney - Shedden - Western Elgin County.
Tonight..Clearing early this evening. Wind east 30 km/h becoming
 light early this evening. Low 8.
Thursday..Sunny. Wind becoming southeast 20 km/h late in the morning.
 High 19. UV index 6 or high.
Thursday night..Clear. Low 6.

St. Thomas - Aylmer - Eastern Elgin County.
Tonight..Clear. Wind east 20 km/h gusting to 40 becoming light late
 this evening. Low 8.
Thursday..Sunny. Wind becoming east 20 km/h late in the morning.
 High 20. UV index 6 or high.
Thursday night..Clear. Low 6.

Strathroy - Komoka - Western Middlesex County.
Tonight..Clearing early this evening. Wind east 20 km/h gusting to 40
 becoming light early this evening. Low 8.
Thursday..Sunny. Wind becoming east 20 km/h late in the morning.
 High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

London - Parkhill - Eastern Middlesex County.
Tonight..Clear. Wind east 20 km/h gusting to 40 becoming light this
 evening. Low 8.
Thursday..Sunny. Wind becoming east 20 km/h late in the morning.
 High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Simcoe - Delhi - Norfolk.
Tonight..Clear. Wind northeast 20 km/h gusting to 40 becoming light
 this evening. Low 8.
Thursday..Sunny. Wind becoming northeast 20 km/h late in the morning.
 High 20. UV index 5 or moderate.
Thursday night..Clear. Wind northeast 20 km/h becoming light in the
 evening. Low plus 4.

Dunnville - Caledonia - Haldimand.
Tonight..Clear. Wind northeast 20 km/h gusting to 40 becoming light
 late this evening. Low 7.
Thursday..Sunny. Wind becoming northeast 20 km/h late in the morning.
 High 20. UV index 5 or moderate.
Thursday night..Clear. Wind northeast 20 km/h becoming light in the
 evening. Low plus 4.

Woodstock - Tillsonburg - Oxford County.
Tonight..Clear. Wind east 20 km/h gusting to 40 becoming light late
 this evening. Low 7.
Thursday..Sunny. Wind becoming east 20 km/h late in the morning.
 High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Brantford - County of Brant.
Tonight..Clear. Wind east 30 km/h gusting to 50 becoming light late
 this evening. Low 7.
Thursday..Sunny. Wind becoming east 30 km/h late in the morning.
 High 20. UV index 5 or moderate.
Thursday night..Clear. Wind northeast 20 km/h becoming light in the
 evening. Low plus 4.

Niagara Falls - Welland - Southern Niagara Region.
Tonight..Clear. Wind northeast 20 km/h gusting to 40 becoming light
 this evening. Low 10.
Thursday..Sunny. Wind becoming northeast 20 km/h late in the morning.
 High 19. UV index 5 or moderate.
Thursday night..Clear. Low 10.

St. Catharines - Grimsby - Northern Niagara Region.
Tonight..Clear. Wind east 20 km/h gusting to 40 becoming light this
 evening. Low 9.
Thursday..Sunny. Wind becoming northeast 30 km/h late in the morning.
 High 19. UV index 5 or moderate.
Thursday night..Clear. Wind east 20 km/h becoming light in the
 evening. Low 6.

City of Hamilton.
Tonight..Clear. Wind east 30 km/h gusting to 50 becoming light late
 this evening. Low 10.
Thursday..Sunny. Wind becoming northeast 30 km/h late in the morning.
 High 18. UV index 5 or moderate.
Thursday night..Clear. Wind northeast 20 km/h becoming light in the
 evening. Low 7.

Burlington - Oakville.
Tonight..Clear. Wind east 30 km/h gusting to 50 becoming light after
 midnight. Low 10.
Thursday..Sunny. Wind becoming east 30 km/h late in the morning.
 High 18. UV index 5 or moderate.
Thursday night..Clear. Wind east 20 km/h becoming light in the
 evening. Low 9.

Halton Hills - Milton.
Tonight..Clear. Wind east 20 km/h gusting to 40 becoming light this
 evening. Low 6.
Thursday..Sunny. Wind east 20 km/h becoming light in the afternoon.
 High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 5.

Mississauga - Brampton.
Tonight..Clear. Wind east 20 km/h gusting to 40 becoming light this
 evening. Low 6.
Thursday..Sunny. Wind east 20 km/h becoming light in the afternoon.
 High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 5.

Caledon.
Tonight..Clear. Wind east 20 km/h becoming light this evening. Low 6.
Thursday..Sunny. Wind east 20 km/h becoming light in the afternoon.
 High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 5.

Vaughan - Richmond Hill - Markham.
Tonight..Clear. Wind east 20 km/h gusting to 40 becoming light this
 evening. Low 7.
Thursday..Sunny. Wind east 20 km/h becoming light in the afternoon.
 High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Newmarket - Georgina - Northern York Region.
Tonight..Clear. Wind east 20 km/h becoming light early this evening.
 Low 7.
Thursday..Sunny. Wind east 20 km/h becoming light late in the
 morning. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 3 with risk of frost.

Pickering - Oshawa - Southern Durham Region.
Tonight..Clear. Wind east 20 km/h becoming light this evening. Low 7.
Thursday..Sunny. High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Uxbridge - Beaverton - Northern Durham Region.
Tonight..Clear. Wind east 20 km/h becoming light this evening. Low 7.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Goderich - Bluewater - Southern Huron County.
Tonight..Clear. Wind east 20 km/h gusting to 40. Low 6.
Thursday..Sunny. Wind southeast 30 km/h becoming light late in the
 morning. High 21. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Wingham - Blyth - Northern Huron County.
Tonight..Clear. Wind east 20 km/h gusting to 40 becoming light this
 evening. Low 6.
Thursday..Sunny. Wind east 20 km/h becoming light in the afternoon.
 High 21. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Stratford - Mitchell - Southern Perth County.
Tonight..Clear. Wind east 20 km/h gusting to 40 becoming light late
 this evening. Low 6.
Thursday..Sunny. Wind east 20 km/h becoming light in the afternoon.
 High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Listowel - Milverton - Northern Perth County.
Tonight..Clear. Wind east 20 km/h gusting to 40 becoming light this
 evening. Low 6.
Thursday..Sunny. Wind east 20 km/h becoming light in the afternoon.
 High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Kitchener - Cambridge - Region of Waterloo.
Tonight..Clear. Wind east 20 km/h gusting to 40 becoming light late
 this evening. Low 7.
Thursday..Sunny. Wind east 20 km/h becoming light in the afternoon.
 High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Guelph - Erin - Southern Wellington County.
Tonight..Clear. Wind east 20 km/h gusting to 40 becoming light this
 evening. Low 7.
Thursday..Sunny. Wind becoming east 20 km/h in the morning. High 19.
 UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Mount Forest - Arthur - Northern Wellington County.
Tonight..Clear. Wind east 20 km/h becoming light this evening. Low 7.
Thursday..Sunny. Wind east 20 km/h becoming light in the afternoon.
 High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 3 with risk of frost.

Orangeville - Grand Valley - Southern Dufferin County.
Tonight..Clear. Wind east 20 km/h becoming light this evening. Low
 plus 5.
Thursday..Sunny. Wind becoming southeast 20 km/h late in the morning.
 High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 3 with risk of frost.

Shelburne - Mansfield - Northern Dufferin County.
Tonight..Clear. Wind east 20 km/h becoming light this evening. Low
 plus 5.
Thursday..Sunny. Wind east 20 km/h becoming light in the afternoon.
 High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 3 with risk of frost.

Innisfil - New Tecumseth - Angus.
Tonight..Clear. Wind east 20 km/h becoming light early this evening.
 Low plus 5.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 3 with risk of frost.

Saugeen Shores - Kincardine - Southern Bruce County.
Tonight..Clear. Wind east 20 km/h becoming light this evening. Low 9.
Thursday..Sunny. Wind east 20 km/h becoming light late in the
 morning. High 21. UV index 5 or moderate.
Thursday night..Clear. Low 6.

Bruce Peninsula - Sauble Beach - Tobermory.
Tonight..Clear. Wind east 20 km/h becoming light this evening. Low 9.
Thursday..Sunny. Wind east 20 km/h becoming light late in the
 morning. High 19. UV index 5 or moderate.
Thursday night..Clear. Low 7.

Hanover - Dundalk - Southern Grey County.
Tonight..Clear. Wind east 20 km/h becoming light this evening. Low 7.
Thursday..Sunny. Wind east 20 km/h becoming light in the afternoon.
 High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 3 with risk of frost.

Owen Sound - Blue Mountains - Northern Grey County.
Tonight..Clear. Wind east 30 km/h becoming light this evening. Low 8.
Thursday..Sunny. Wind becoming east 20 km/h late in the morning.
 High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 3 with risk of frost.

Barrie - Collingwood - Hillsdale.
Tonight..Clear. Wind east 20 km/h becoming light this evening. Low 8.
Thursday..Sunny. High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 3 with risk of frost.

Midland - Coldwater - Orr Lake.
Tonight..Clear. Wind east 20 km/h becoming light early this evening.
 Low 8.
Thursday..Sunny. High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 3.

Orillia - Lagoon City - Washago.
Tonight..Clear. Wind east 30 km/h. Low 6.
Thursday..Sunny. High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 3 with risk of frost.

Cobourg - Colborne - Western Northumberland County.
Tonight..Clear. Low 8.
Thursday..Sunny. High 19. UV index 5 or moderate.
Thursday night..Clear. Low 6.

Belleville - Quinte West - Eastern Northumberland County.
Tonight..Clear. Low 8.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low 6.

Picton - Sandbanks Park.
Tonight..Clear. Low 8.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low 6.

Napanee - Consecon.
Tonight..Clear. Low 8.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low 6.

Kingston - Odessa - Frontenac Islands.
Tonight..Clear. Wind northeast 20 km/h becoming light this evening.
 Low 8.
Thursday..Sunny. Wind becoming northeast 20 km/h late in the morning.
 High 20. UV index 5 or moderate.
Thursday night..Clear. Wind northeast 20 km/h becoming light in the
 evening. Low 6.

Lindsay - Southern Kawartha Lakes.
Tonight..Clear. Wind east 20 km/h becoming light this evening. Low
 plus 4.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Fenelon Falls - Balsam Lake Park - Northern Kawartha Lakes.
Tonight..Clear. Wind east 20 km/h becoming light early this evening.
 Low plus 3 with patchy frost.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 3 with patchy frost.

Peterborough City - Lakefield - Southern Peterborough County.
Tonight..Clear. Wind east 20 km/h becoming light early this evening.
 Low plus 4.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Apsley - Woodview - Northern Peterborough County.
Tonight..Clear. Low plus 3 with patchy frost.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 3 with patchy frost.

Stirling - Tweed - Madoc.
Tonight..Clear. Wind east 20 km/h becoming light early this evening.
 Low 6.
Thursday..Sunny. High 19. UV index 5 or moderate.
Thursday night..Clear. Low 6.

Tamworth - Sydenham - South Frontenac.
Tonight..Clear. Wind northeast 20 km/h becoming light early this
 evening. Low plus 5.
Thursday..Sunny. High 19. UV index 5 or moderate.
Thursday night..Clear. Low 6.

Kaladar - Bannockburn - Bon Echo Park.
Tonight..Clear. Wind northeast 20 km/h becoming light this evening.
 Low plus 3 with patchy frost.
Thursday..Sunny. High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 3 with patchy frost.

Bancroft - Hastings Highlands - Denbigh.
Tonight..Clear. Low zero with patchy frost.
Thursday..Sunny. High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 1 with patchy frost.

Gananoque - Mallorytown.
Tonight..Clear. Wind northeast 20 km/h becoming light early this
 evening. Low plus 5.
Thursday..Sunny. Wind becoming northeast 20 km/h late in the morning.
 High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Brockville - Prescott.
Tonight..Clear. Wind northeast 20 km/h becoming light this evening.
 Low plus 5.
Thursday..Sunny. Wind becoming northeast 20 km/h late in the morning.
 High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Westport - Charleston Lake.
Tonight..Clear. Wind northeast 20 km/h becoming light this evening.
 Low plus 3 with patchy frost.
Thursday..Sunny. Wind becoming northeast 20 km/h late in the morning.
 High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Merrickville-Wolford - Kemptville.
Tonight..Clear. Wind northeast 20 km/h becoming light early this
 evening. Low plus 3 with patchy frost.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Ottawa North - Kanata - Orl�ans.
Tonight..Clear. Wind east 20 km/h becoming light early this evening.
 Low plus 3 with patchy frost.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Ottawa South - Richmond - Metcalfe.
Tonight..Clear. Wind east 20 km/h becoming light early this evening.
 Low plus 3 with patchy frost.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Gatineau.
Tonight..Clear. Low plus 3 with patchy frost.
Thursday..Sunny. High 21. UV index 5 or moderate.
Thursday night..Clear. Low plus 5.

Prescott and Russell.
Tonight..Clear. Wind east 20 km/h becoming light early this evening.
 Low plus 3 with patchy frost.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Morrisburg - Long Sault.
Tonight..Clear. Wind northeast 20 km/h becoming light this evening.
 Low plus 4.
Thursday..Sunny. Wind becoming northeast 20 km/h in the afternoon.
 High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Cornwall - Lancaster.
Tonight..Clear. Wind northeast 30 km/h becoming light early this
 evening. Low plus 4.
Thursday..Sunny. High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Winchester - Newington.
Tonight..Clear. Wind northeast 20 km/h becoming light early this
 evening. Low plus 3 with patchy frost.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Maxville - Alexandria.
Tonight..Clear. Wind east 20 km/h becoming light early this evening.
 Low plus 3 with patchy frost.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Plevna - Sharbot Lake - Western Lanark County.
Tonight..Clear. Wind east 20 km/h becoming light early this evening.
 Low plus 2 with patchy frost.
Thursday..Sunny. High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 5.

Smiths Falls - Perth - Eastern Lanark County.
Tonight..Clear. Wind northeast 20 km/h becoming light early this
 evening. Low plus 2 with patchy frost.
Thursday..Sunny. High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 5.

Port Carling - Port Severn.
Tonight..Clear. Wind southeast 20 km/h becoming light early this
 evening. Low plus 5.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Bracebridge - Gravenhurst.
Tonight..Clear. Wind east 20 km/h becoming light early this evening.
 Low plus 3 with patchy frost.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 2 with patchy frost.

Town of Parry Sound - Rosseau - Killbear Park.
Tonight..Clear. Wind east 20 km/h becoming light late this evening.
 Low plus 5.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

Huntsville - Baysville.
Tonight..Clear. Low plus 3 with patchy frost.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 2 with patchy frost.

Haliburton - Minden - Southern Haliburton County.
Tonight..Clear. Wind east 20 km/h becoming light early this evening.
 Low zero with patchy frost.
Thursday..Sunny. High 19. UV index 5 or moderate.
Thursday night..Clear. Low plus 2 with patchy frost.

Oxtongue Lake - Fort Irwin - Northern Haliburton County.
Tonight..Clear. Low zero with patchy frost.
Thursday..Sunny. High 19. UV index 5 or moderate.
Thursday night..Clear. Low zero with frost.

Barry's Bay - Killaloe.
Tonight..Clear. Low plus 1 with patchy frost.
Thursday..Sunny. High 18. UV index 5 or moderate.
Thursday night..Clear. Low plus 2 with patchy frost.

Renfrew - Arnprior - Calabogie.
Tonight..Clear. Low plus 1 with patchy frost.
Thursday..Sunny. High 18. UV index 5 or moderate.
Thursday night..Clear. Low plus 3 with patchy frost.

Petawawa - Pembroke - Cobden.
Tonight..Clear. Low plus 1 with patchy frost.
Thursday..Sunny. High 18. UV index 5 or moderate.
Thursday night..Clear. Low plus 3 with patchy frost.

Western Algonquin Park - Lake of Two Rivers.
Tonight..Clear. Low minus 1 with frost.
Thursday..Sunny. High 18. UV index 5 or moderate.
Thursday night..Clear. Low minus 1 with frost.

Deep River - Whitney - Eastern Algonquin Park.
Tonight..Clear. Low minus 1 with frost.
Thursday..Sunny. High 18. UV index 5 or moderate.
Thursday night..Clear. Low minus 1 with frost.

Bayfield Inlet - Dunchurch.
Tonight..Clear. Low plus 3 with patchy frost.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 4.

South River - Burk's Falls.
Tonight..Clear. Low plus 3 with patchy frost.
Thursday..Sunny. High 20. UV index 5 or moderate.
Thursday night..Clear. Low plus 3 with patchy frost.

End
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--- up 3 hours, 1 minute
 * Origin: Northern Realms (618:400/23)