FPCN11 CWTO 181930
Forecasts for Southern Ontario and the National Capital Region issued
by Environment Canada at 3:30 p.m. EDT Wednesday 18 September 2024
for tonight Thursday and Thursday night.
The next scheduled forecast will be issued at 5:00 a.m. EDT Thursday.

City of Toronto.
Tonight..A few clouds. Low 16.
Thursday..Sunny. High 27. Humidex 31. UV index 6 or high.
Thursday night..Clear. Low 15.

Windsor - Leamington - Essex County.
Tonight..A few clouds. Low 15.
Thursday..Sunny. High 27. Humidex 33. UV index 6 or high.
Thursday night..Clear. Low 14.

Chatham-Kent - Rondeau Park.
Tonight..A few clouds. Low 15.
Thursday..Sunny. High 27. Humidex 33. UV index 6 or high.
Thursday night..Clear. Low 14.

Sarnia - Petrolia - Western Lambton County.
Tonight..A few clouds. Fog patches developing before morning. Low 13.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 33. UV index 6 or high.
Thursday night..Clear. Low 13.

Watford - Pinery Park - Eastern Lambton County.
Tonight..A few clouds. Fog patches developing before morning. Low 13.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 33. UV index 6 or high.
Thursday night..Clear. Low 13.

Rodney - Shedden - Western Elgin County.
Tonight..A few clouds. Low 13.
Thursday..Sunny. High 27. Humidex 33. UV index 6 or high.
Thursday night..Clear. Low 13.

St. Thomas - Aylmer - Eastern Elgin County.
Tonight..A few clouds. Low 13.
Thursday..Sunny. High 27. Humidex 33. UV index 6 or high.
Thursday night..Clear. Low 13.

Strathroy - Komoka - Western Middlesex County.
Tonight..A few clouds. Low 13.
Thursday..Sunny. High 28. Humidex 33. UV index 6 or high.
Thursday night..Clear. Low 12.

London - Parkhill - Eastern Middlesex County.
Tonight..A few clouds. Low 13.
Thursday..Sunny. High 28. Humidex 33. UV index 6 or high.
Thursday night..Clear. Low 12.

Simcoe - Delhi - Norfolk.
Tonight..A few clouds. Low 12.
Thursday..Sunny. High 28. Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 12.

Dunnville - Caledonia - Haldimand.
Tonight..A few clouds. Fog patches developing overnight. Low 14.
Thursday..Sunny. Fog patches dissipating in the morning. High 27.
 Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 13.

Woodstock - Tillsonburg - Oxford County.
Tonight..A few clouds. Low 12.
Thursday..Sunny. High 27. Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 11.

Brantford - County of Brant.
Tonight..A few clouds. Low 12.
Thursday..Sunny. High 27. Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 11.

Niagara Falls - Welland - Southern Niagara Region.
Tonight..A few clouds. Fog patches developing overnight. Low 16.
Thursday..Sunny. Fog patches dissipating in the morning. High 26.
 Humidex 31. UV index 6 or high.
Thursday night..Clear. Low 14.

St. Catharines - Grimsby - Northern Niagara Region.
Tonight..A few clouds. Fog patches developing overnight. Low 14.
Thursday..Sunny. Fog patches dissipating in the morning. High 26.
 Humidex 31. UV index 6 or high.
Thursday night..Clear. Low 14.

City of Hamilton.
Tonight..A few clouds. Low 15.
Thursday..Sunny. High 27. Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 14.

Burlington - Oakville.
Tonight..A few clouds. Low 14.
Thursday..Sunny. High 26. Humidex 30. UV index 6 or high.
Thursday night..Clear. Low 14.

Halton Hills - Milton.
Tonight..A few clouds. Low 14.
Thursday..Sunny. High 27. Humidex 31. UV index 6 or high.
Thursday night..Clear. Low 14.

Mississauga - Brampton.
Tonight..A few clouds. Low 14.
Thursday..Sunny. High 27. Humidex 31. UV index 6 or high.
Thursday night..Clear. Low 14.

Caledon.
Tonight..A few clouds. Low 14.
Thursday..Sunny. High 26. Humidex 30. UV index 6 or high.
Thursday night..Clear. Low 14.

Vaughan - Richmond Hill - Markham.
Tonight..A few clouds. Low 12.
Thursday..Sunny. High 27. Humidex 30. UV index 6 or high.
Thursday night..Clear. Low 12.

Newmarket - Georgina - Northern York Region.
Tonight..A few clouds. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 27.
 Humidex 30. UV index 6 or high.
Thursday night..Clear. Low 12.

Pickering - Oshawa - Southern Durham Region.
Tonight..A few clouds. Low 12.
Thursday..Sunny. High 27. Humidex 30. UV index 6 or high.
Thursday night..Clear. Low 12.

Uxbridge - Beaverton - Northern Durham Region.
Tonight..A few clouds. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 27.
 Humidex 30. UV index 6 or high.
Thursday night..Clear. Low 12.

Goderich - Bluewater - Southern Huron County.
Tonight..A few clouds. Low 12.
Thursday..Sunny. High 28. Humidex 31. UV index 6 or high.
Thursday night..Clear. Wind east 20 km/h becoming light after
 midnight. Low 11.

Wingham - Blyth - Northern Huron County.
Tonight..A few clouds. Low 12.
Thursday..Sunny. High 28. Humidex 31. UV index 6 or high.
Thursday night..Clear. Low 11.

Stratford - Mitchell - Southern Perth County.
Tonight..Clear. Low 12.
Thursday..Sunny. High 28. Humidex 31. UV index 6 or high.
Thursday night..Clear. Low 11.

Listowel - Milverton - Northern Perth County.
Tonight..Clear. Low 12.
Thursday..Sunny. High 28. Humidex 31. UV index 6 or high.
Thursday night..Clear. Low 11.

Kitchener - Cambridge - Region of Waterloo.
Tonight..A few clouds. Low 12.
Thursday..Sunny. High 27. Humidex 30. UV index 6 or high.
Thursday night..Clear. Low 10.

Guelph - Erin - Southern Wellington County.
Tonight..A few clouds. Low 12.
Thursday..Sunny. High 27. Humidex 30. UV index 6 or high.
Thursday night..Clear. Low 10.

Mount Forest - Arthur - Northern Wellington County.
Tonight..Clear. Low 12.
Thursday..Sunny. High 27. Humidex 30. UV index 6 or high.
Thursday night..Clear. Low 10.

Orangeville - Grand Valley - Southern Dufferin County.
Tonight..Clear. Low 12.
Thursday..Sunny. High 26. Humidex 29. UV index 6 or high.
Thursday night..Clear. Low 14.

Shelburne - Mansfield - Northern Dufferin County.
Tonight..Clear. Low 12.
Thursday..Sunny. High 26. Humidex 29. UV index 6 or high.
Thursday night..Clear. Low 14.

Innisfil - New Tecumseth - Angus.
Tonight..Clear. Fog patches developing overnight. Low 11.
Thursday..Sunny. Fog patches dissipating in the morning. High 27.
 Humidex 31. UV index 6 or high.
Thursday night..Clear. Low 8.

Saugeen Shores - Kincardine - Southern Bruce County.
Tonight..Clear. Low 12.
Thursday..Sunny. High 27. Humidex 29. UV index 6 or high.
Thursday night..Clear. Low 12.

Bruce Peninsula - Sauble Beach - Tobermory.
Tonight..Clear. Low 12.
Thursday..Sunny. High 26. Humidex 28. UV index 6 or high.
Thursday night..Clear. Low 12.

Hanover - Dundalk - Southern Grey County.
Tonight..Clear. Low 12.
Thursday..Sunny. High 27. Humidex 29. UV index 6 or high.
Thursday night..Clear. Low 12.

Owen Sound - Blue Mountains - Northern Grey County.
Tonight..Clear. Low 12.
Thursday..Sunny. High 27. Humidex 33. UV index 5 or moderate.
Thursday night..Clear. Low 16.

Barrie - Collingwood - Hillsdale.
Tonight..Clear. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 26.
 Humidex 30. UV index 6 or high.
Thursday night..Clear. Low 13.

Midland - Coldwater - Orr Lake.
Tonight..Clear. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 26.
 Humidex 30. UV index 6 or high.
Thursday night..Clear. Low 13.

Orillia - Lagoon City - Washago.
Tonight..Clear. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 26.
 Humidex 30. UV index 6 or high.
Thursday night..Clear. Low 13.

Cobourg - Colborne - Western Northumberland County.
Tonight..A few clouds. Low 13.
Thursday..Sunny. High 27. Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 13.

Belleville - Quinte West - Eastern Northumberland County.
Tonight..A few clouds. Low 13.
Thursday..Sunny. High 27. Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 13.

Picton - Sandbanks Park.
Tonight..A few clouds. Low 13.
Thursday..Sunny. High 27. Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 13.

Napanee - Consecon.
Tonight..A few clouds. Low 13.
Thursday..Sunny. High 27. Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 13.

Kingston - Odessa - Frontenac Islands.
Tonight..A few clouds. Low 13.
Thursday..Sunny. Wind northeast 20 km/h becoming light in the
 afternoon. High 27. Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 13.

Lindsay - Southern Kawartha Lakes.
Tonight..A few clouds. Fog patches developing overnight. Low 10.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 10.

Fenelon Falls - Balsam Lake Park - Northern Kawartha Lakes.
Tonight..A few clouds. Fog patches developing overnight. Low 9.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 10.

Peterborough City - Lakefield - Southern Peterborough County.
Tonight..A few clouds. Fog patches developing overnight. Low 10.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 10.

Apsley - Woodview - Northern Peterborough County.
Tonight..A few clouds. Fog patches developing overnight. Low 9.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 10.

Stirling - Tweed - Madoc.
Tonight..A few clouds. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 33. UV index 6 or high.
Thursday night..Clear. Low 12.

Tamworth - Sydenham - South Frontenac.
Tonight..A few clouds. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 33. UV index 6 or high.
Thursday night..Clear. Low 12.

Kaladar - Bannockburn - Bon Echo Park.
Tonight..A few clouds. Fog patches developing overnight. Low 9.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 33. UV index 6 or high.
Thursday night..Clear. Low 9.

Bancroft - Hastings Highlands - Denbigh.
Tonight..A few clouds. Fog patches developing overnight. Low 8.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 33. UV index 6 or high.
Thursday night..Clear. Low 9.

Gananoque - Mallorytown.
Tonight..A few clouds. Fog patches developing overnight. Low 13.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 31. UV index 6 or high.
Thursday night..Clear. Low 13.

Brockville - Prescott.
Tonight..A few clouds. Fog patches developing overnight. Low 13.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 31. UV index 6 or high.
Thursday night..Clear. Low 13.

Westport - Charleston Lake.
Tonight..A few clouds. Fog patches developing overnight. Low 13.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 31. UV index 6 or high.
Thursday night..Clear. Low 13.

Merrickville-Wolford - Kemptville.
Tonight..A few clouds. Fog patches developing overnight. Low 13.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 31. UV index 6 or high.
Thursday night..Clear. Low 13.

Ottawa North - Kanata - Orl�ans.
Tonight..A few clouds. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 32. UV index 5 or moderate.
Thursday night..Clear. Low 12.

Ottawa South - Richmond - Metcalfe.
Tonight..A few clouds. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 32. UV index 5 or moderate.
Thursday night..Clear. Low 12.

Gatineau.
Tonight..A few clouds. Fog patches developing overnight. Low 14.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 31. UV index 5 or moderate.
Thursday night..Clear. Low 14.

Prescott and Russell.
Tonight..A few clouds. Fog patches developing overnight. Low 13.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 32. UV index 5 or moderate.
Thursday night..Clear. Low 13.

Morrisburg - Long Sault.
Tonight..A few clouds. Fog patches developing overnight. Low 12.
Thursday..A mix of sun and cloud. Becoming sunny in the morning. Fog
 patches dissipating in the morning. High 28. Humidex 33. UV index 6
 or high.
Thursday night..Clear. Low 12.

Cornwall - Lancaster.
Tonight..A few clouds. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 33. UV index 6 or high.
Thursday night..Clear. Low 12.

Winchester - Newington.
Tonight..A few clouds. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 33. UV index 6 or high.
Thursday night..Clear. Low 12.

Maxville - Alexandria.
Tonight..A few clouds. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 33. UV index 6 or high.
Thursday night..Clear. Low 12.

Plevna - Sharbot Lake - Western Lanark County.
Tonight..A few clouds. Fog patches developing overnight. Low 11.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 11.

Smiths Falls - Perth - Eastern Lanark County.
Tonight..A few clouds. Fog patches developing overnight. Low 11.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 32. UV index 6 or high.
Thursday night..Clear. Low 11.

Port Carling - Port Severn.
Tonight..A few clouds. Fog patches developing overnight. Low 9.
Thursday..Sunny. Fog patches dissipating in the morning. High 27.
 Humidex 30. UV index 5 or moderate.
Thursday night..Clear. Low 11.

Bracebridge - Gravenhurst.
Tonight..Clear. Fog patches developing overnight. Low 9.
Thursday..Sunny. Fog patches dissipating in the morning. High 27.
 Humidex 30. UV index 5 or moderate.
Thursday night..Clear. Low 11.

Town of Parry Sound - Rosseau - Killbear Park.
Tonight..Clear. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 27.
 Humidex 30. UV index 5 or moderate.
Thursday night..Clear. Low 11.

Huntsville - Baysville.
Tonight..Clear. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 27.
 Humidex 30. UV index 5 or moderate.
Thursday night..Clear. Low 11.

Haliburton - Minden - Southern Haliburton County.
Tonight..Clear. Fog patches developing overnight. Low 8.
Thursday..Sunny. Fog patches dissipating in the morning. High 26.
 Humidex 29. UV index 6 or high.
Thursday night..Clear. Low 11.

Oxtongue Lake - Fort Irwin - Northern Haliburton County.
Tonight..Clear. Fog patches developing overnight. Low 8.
Thursday..Sunny. Fog patches dissipating in the morning. High 26.
 Humidex 29. UV index 6 or high.
Thursday night..Clear. Low 11.

Barry's Bay - Killaloe.
Tonight..A few clouds. Fog patches developing overnight. Low 11.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 33. UV index 5 or moderate.
Thursday night..Clear. Low 11.

Renfrew - Arnprior - Calabogie.
Tonight..A few clouds. Fog patches developing overnight. Low 11.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 33. UV index 5 or moderate.
Thursday night..Clear. Low 11.

Petawawa - Pembroke - Cobden.
Tonight..A few clouds. Fog patches developing overnight. Low 11.
Thursday..Sunny. Fog patches dissipating in the morning. High 28.
 Humidex 33. UV index 5 or moderate.
Thursday night..Clear. Low 11.

Western Algonquin Park - Lake of Two Rivers.
Tonight..A few clouds. Fog patches developing overnight. Low 8.
Thursday..Sunny. Fog patches dissipating in the morning. High 26.
 Humidex 29. UV index 5 or moderate.
Thursday night..Clear. Low 7.

Deep River - Whitney - Eastern Algonquin Park.
Tonight..A few clouds. Fog patches developing overnight. Low 8.
Thursday..Sunny. Fog patches dissipating in the morning. High 26.
 Humidex 29. UV index 5 or moderate.
Thursday night..Clear. Low 7.

Bayfield Inlet - Dunchurch.
Tonight..Clear. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 26.
 Humidex 29. UV index 5 or moderate.
Thursday night..Clear. Low 13.

South River - Burk's Falls.
Tonight..Clear. Fog patches developing overnight. Low 12.
Thursday..Sunny. Fog patches dissipating in the morning. High 26.
 Humidex 29. UV index 5 or moderate.
Thursday night..Clear. Low 13.

End
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--- up 1 day, 6 hours, 58 minutes
 * Origin: Northern Realms (618:400/23)