FPCN11 CWTO 111930
Forecasts for Southern Ontario and the National Capital Region issued
by Environment Canada at 3:30 p.m. EDT Friday 11 September 2026 for
tonight Saturday and Saturday night.
The next scheduled forecast will be issued at 5:00 a.m. EDT Saturday.

City of Toronto.
Tonight..Clear. Low 12.
Saturday..Sunny. Increasing cloudiness in the afternoon then
 40 percent chance of showers late in the afternoon. Risk of
 thunderstorms late in the afternoon. High 25. Humidex 31. UV index 6
 or high.
Saturday night..Mainly cloudy with 40 percent chance of showers and
 risk of thunderstorms. Low 20.

Windsor - Essex - Chatham-Kent.
Tonight..Clear. Low 15.
Saturday..Increasing cloudiness early in the morning. 40 percent
 chance of showers late in the afternoon with risk of thunderstorms.
 Wind becoming south 20 km/h late in the afternoon. High 27. Humidex
 35. UV index 3 or moderate.
Saturday night..Partly cloudy with 40 percent chance of showers.
 Becoming clear before morning. Risk of thunderstorms. Wind south
 20 km/h becoming light after midnight. Low 18.

Sarnia - Lambton.
Tonight..Clear. Low 14.
Saturday..Increasing cloudiness. 40 percent chance of showers late in
 the afternoon with risk of thunderstorms. Wind becoming south
 30 km/h late in the morning. High 26. Humidex 35. UV index 4 or
 moderate.
Saturday night..Partly cloudy with 40 percent chance of showers and
 risk of thunderstorms. Wind south 20 km/h becoming light near
 midnight. Low 18.

Elgin.
Tonight..Clear. Low 14.
Saturday..Increasing cloudiness. 40 percent chance of showers late in
 the afternoon with risk of thunderstorms. Wind becoming southwest
 30 km/h late in the morning. High 24. Humidex 31. UV index 7 or
 high.
Saturday night..Partly cloudy with 40 percent chance of showers and
 risk of thunderstorms. Wind southwest 30 km/h becoming light after
 midnight. Low 17.

London - Middlesex.
Tonight..Clear. Low 13.
Saturday..Increasing cloudiness. 40 percent chance of showers late in
 the afternoon with risk of thunderstorms. Wind becoming south
 30 km/h in the morning. High 25. Humidex 32. UV index 7 or high.
Saturday night..Partly cloudy with 40 percent chance of showers and
 risk of thunderstorms. Wind becoming southwest 20 km/h near
 midnight. Low 18.

Simcoe - Delhi - Norfolk.
Tonight..Clear. Low 10.
Saturday..Mainly sunny. Increasing cloudiness in the afternoon then
 60 percent chance of showers late in the afternoon. Risk of
 thunderstorms late in the afternoon. High 26. Humidex 33. UV index 7
 or high.
Saturday night..Cloudy with 60 percent chance of showers and risk of
 thunderstorms. Low 19.

Dunnville - Caledonia - Haldimand.
Tonight..Clear. Low 10.
Saturday..Sunny. Increasing cloudiness in the afternoon then
 60 percent chance of showers late in the afternoon. Risk of
 thunderstorms late in the afternoon. Wind becoming southwest 20 km/h
 late in the afternoon. High 25. Humidex 31. UV index 7 or high.
Saturday night..Cloudy with 60 percent chance of showers and risk of
 thunderstorms. Wind southwest 20 km/h. Low 19.

Oxford - Brant.
Tonight..Clear. Low 9.
Saturday..Increasing cloudiness. 60 percent chance of showers late in
 the afternoon with risk of thunderstorms. Wind becoming south
 20 km/h late in the morning. High 27. Humidex 33. UV index 7 or
 high.
Saturday night..Partly cloudy with 60 percent chance of showers and
 risk of thunderstorms. Wind southwest 20 km/h. Low 18.

Niagara Falls - Welland - Southern Niagara Region.
Tonight..Clear. Low 18.
Saturday..Sunny. Increasing cloudiness in the afternoon then
 60 percent chance of showers late in the afternoon. Risk of
 thunderstorms late in the afternoon. High 25. Humidex 32. UV index 7
 or high.
Saturday night..Cloudy with 60 percent chance of showers and risk of
 thunderstorms. Wind becoming southwest 20 km/h near midnight.
 Temperature steady near 22.

St. Catharines - Grimsby - Northern Niagara Region.
Tonight..Clear. Low 12.
Saturday..Sunny. Increasing cloudiness in the afternoon then
 60 percent chance of showers late in the afternoon. Risk of
 thunderstorms late in the afternoon. Wind becoming south 20 km/h
 late in the morning. High 29. Humidex 36. UV index 6 or high.
Saturday night..Cloudy with 60 percent chance of showers and risk of
 thunderstorms. Wind becoming southwest 20 km/h near midnight.
 Low 21.

City of Hamilton.
Tonight..Clear. Low 11.
Saturday..Sunny. Increasing cloudiness in the afternoon then
 60 percent chance of showers late in the afternoon. Risk of
 thunderstorms late in the afternoon. Wind becoming south 20 km/h in
 the afternoon. High 27. Humidex 34. UV index 7 or high.
Saturday night..Cloudy with 60 percent chance of showers and risk of
 thunderstorms. Wind becoming southwest 20 km/h near midnight.
 Low 19.

Halton - Peel.
Tonight..Clear. Low 9.
Saturday..Sunny. Increasing cloudiness in the afternoon then
 40 percent chance of showers late in the afternoon. Risk of
 thunderstorms late in the afternoon. High 27. Humidex 34. UV index 7
 or high.
Saturday night..Mainly cloudy with 40 percent chance of showers and
 risk of thunderstorms. Low 18.

York - Durham.
Tonight..Clear. Fog patches developing near midnight. Low 10.
Saturday..Sunny. Increasing cloudiness in the afternoon. Fog patches
 dissipating early in the morning. Wind becoming south 20 km/h late
 in the afternoon. High 26. Humidex 31. UV index 7 or high.
Saturday night..Mainly cloudy. 40 percent chance of showers late in
 the evening and overnight with risk of thunderstorms. Wind south
 20 km/h becoming light in the evening. Low 19.

Huron - Perth.
Tonight..Clear. Low 11.
Saturday..Increasing cloudiness late in the morning. Wind becoming
 south 20 km/h in the morning. High 26. Humidex 33. UV index 6 or
 high.
Saturday night..Partly cloudy. 40 percent chance of showers in the
 evening. Wind south 20 km/h becoming light after midnight. Low 15.

Waterloo - Wellington.
Tonight..Clear. Low 10.
Saturday..Sunny. Increasing cloudiness near noon. Wind becoming south
 20 km/h in the afternoon. High 26. Humidex 31. UV index 7 or high.
Saturday night..Cloudy. 40 percent chance of showers in the evening.
 Wind south 20 km/h becoming light near midnight. Low 16.

Dufferin - Innisfil.
Tonight..Clear. Low 7.
Saturday..Sunny. Becoming a mix of sun and cloud late in the morning.
 High 26. Humidex 33. UV index 7 or high.
Saturday night..Mainly cloudy. 40 percent chance of showers in the
 evening. Clearing before morning. Wind becoming southwest 20 km/h
 after midnight. Low 17.

Saugeen Shores - Kincardine - Southern Bruce County.
Tonight..Clear. Wind becoming south 20 km/h late this evening.
 Low 13.
Saturday..A mix of sun and cloud. Wind southwest 30 km/h. High 26.
 Humidex 34. UV index 6 or high.
Saturday night..Partly cloudy. 40 percent chance of showers in the
 evening. Wind southwest 30 km/h becoming light after midnight.
 Low 17.

Bruce Peninsula - Sauble Beach - Tobermory
Hanover - Dundalk - Southern Grey County
Owen Sound - Blue Mountains - Northern Grey County.
Tonight..Clear. Low 11.
Saturday..Sunny. Increasing cloudiness in the afternoon. Wind
 becoming southwest 20 km/h late in the morning. High 24. Humidex 29.
 UV index 6 or high.
Saturday night..Cloudy. 40 percent chance of showers in the evening.
 Wind south 20 km/h becoming light after midnight. Low 14.

Barrie - Orillia - Midland.
Tonight..Clear. Fog patches developing near midnight. Low 9.
Saturday..Mainly sunny. Fog patches dissipating early in the morning.
 High 26. Humidex 34. UV index 6 or high.
Saturday night..Increasing cloudiness early in the evening. Wind
 becoming south 20 km/h near midnight. Low 18.

Belleville - Quinte - Northumberland.
Tonight..Clear. Fog patches developing near midnight. Low 10.
Saturday..Sunny. Increasing cloudiness late in the afternoon. Fog
 patches dissipating early in the morning. High 26. Humidex 32. UV
 index 6 or high.
Saturday night..Cloudy. 40 percent chance of showers late in the
 evening and overnight with risk of thunderstorms. Wind becoming west
 20 km/h before morning. Low 20.

Kingston - Prince Edward.
Tonight..Clear. Fog patches developing near midnight. Low 10.
Saturday..Sunny. Increasing cloudiness late in the afternoon. Fog
 patches dissipating early in the morning. Wind becoming south
 30 km/h late in the morning then light in the afternoon. High 26.
 Humidex 32. UV index 6 or high.
Saturday night..Cloudy. 40 percent chance of showers overnight with
 risk of thunderstorms. Wind south 20 km/h becoming light near
 midnight. Wind becoming southwest 30 before morning. Low 19.

Lindsay - Southern Kawartha Lakes
Fenelon Falls - Balsam Lake Park - Northern Kawartha Lakes.
Tonight..Clear. Fog patches developing near midnight. Low 10.
Saturday..Sunny. Increasing cloudiness late in the afternoon. Fog
 patches dissipating early in the morning. Wind becoming south
 20 km/h in the afternoon. High 26. Humidex 31. UV index 6 or high.
Saturday night..Cloudy. 40 percent chance of showers late in the
 evening and overnight with risk of thunderstorms. Wind south 20 km/h
 becoming light in the evening. Low 19.

Peterborough City - Lakefield - Southern Peterborough County
Apsley - Woodview - Northern Peterborough County.
Tonight..Clear. Fog patches developing near midnight. Low 7.
Saturday..Sunny. Fog patches dissipating early in the morning. Wind
 becoming south 20 km/h in the afternoon. High 26. Humidex 31. UV
 index 6 or high.
Saturday night..Increasing cloudiness early in the evening.
 40 percent chance of showers late in the evening and overnight with
 risk of thunderstorms. Low 18.

Stirling - Tweed - South Frontenac.
Tonight..Clear. Fog patches developing near midnight. Low 9.
Saturday..Sunny. Fog patches dissipating early in the morning.
 High 25. Humidex 30. UV index 6 or high.
Saturday night..Increasing cloudiness. 40 percent chance of showers
 overnight with risk of thunderstorms. Low 19.

Bancroft - Bon Echo Park.
Tonight..Clear. Fog patches developing near midnight. Low plus 5.
Saturday..Sunny. Fog patches dissipating early in the morning.
 High 25. Humidex 30. UV index 6 or high.
Saturday night..Increasing cloudiness early in the evening.
 40 percent chance of showers late in the evening and overnight with
 risk of thunderstorms. Low 17.

Brockville - Leeds and Grenville.
Tonight..Clear. Fog patches developing near midnight. Low 10.
Saturday..Sunny. Increasing cloudiness late in the afternoon. Fog
 patches dissipating early in the morning. High 27. Humidex 32. UV
 index 6 or high.
Saturday night..Cloudy. 40 percent chance of showers overnight with
 risk of thunderstorms. Low 18.

City of Ottawa.
Tonight..Clear. Fog patches developing near midnight. Wind west
 20 km/h becoming light late this evening. Low 9.
Saturday..Sunny. Fog patches dissipating early in the morning. Wind
 becoming south 20 km/h late in the afternoon. High 25. Humidex 30.
 UV index 6 or high.
Saturday night..Increasing cloudiness. 40 percent chance of showers
 overnight with risk of thunderstorms. Wind south 20 km/h becoming
 light in the evening. Low 18.

Gatineau.
Tonight..Clear. Fog patches developing near midnight. Wind west
 20 km/h becoming light this evening. Low 8.
Saturday..Sunny. Fog patches dissipating early in the morning.
 High 26. Humidex 30. UV index 6 or high.
Saturday night..Increasing cloudiness. 40 percent chance of showers
 overnight with risk of thunderstorms. Low 17.

Prescott and Russell.
Tonight..Clear. Fog patches developing near midnight. Low 8.
Saturday..Sunny. Fog patches dissipating early in the morning.
 High 26. Humidex 30. UV index 6 or high.
Saturday night..Increasing cloudiness. 40 percent chance of showers
 overnight with risk of thunderstorms. Low 18 with temperature rising
 to 21 by morning.

Cornwall - Morrisburg.
Tonight..Clear. Fog patches developing near midnight. Low 8.
Saturday..Sunny. Fog patches dissipating early in the morning.
 High 26. Humidex 31. UV index 6 or high.
Saturday night..Increasing cloudiness. 40 percent chance of showers
 overnight with risk of thunderstorms. Low 18.

Smiths Falls - Lanark - Sharbot Lake.
Tonight..Clear. Fog patches developing near midnight. Low 9.
Saturday..Sunny. Fog patches dissipating early in the morning.
 High 25. Humidex 30. UV index 6 or high.
Saturday night..Increasing cloudiness. 40 percent chance of showers
 overnight with risk of thunderstorms. Low 18.

Parry Sound - Muskoka.
Tonight..Clear. Fog patches developing near midnight. Low 9.
Saturday..Increasing cloudiness near noon. Fog patches dissipating
 early in the morning. High 25. Humidex 32. UV index 6 or high.
Saturday night..Overcast. Low 16.

Haliburton.
Tonight..Clear. Fog patches developing near midnight. Low 6.
Saturday..Sunny. Becoming a mix of sun and cloud late in the morning.
 Fog patches dissipating early in the morning. High 25. Humidex 31.
 UV index 6 or high.
Saturday night..Partly cloudy. Becoming cloudy near midnight. Low 17.

Renfrew - Pembroke - Barry's Bay.
Tonight..Clear. Fog patches developing near midnight. Low 8.
Saturday..Mainly sunny. Fog patches dissipating early in the morning.
 High 25. Humidex 30. UV index 6 or high.
Saturday night..Partly cloudy. Low 18.

Algonquin.
Tonight..Clear. Fog patches developing near midnight. Low plus 4.
Saturday..Sunny. Becoming a mix of sun and cloud in the morning. Fog
 patches dissipating early in the morning. High 24. Humidex 29. UV
 index 6 or high.
Saturday night..Partly cloudy. Becoming cloudy near midnight. Low 16.

Burk's Falls - Bayfield Inlet.
Tonight..Clear. Fog patches developing near midnight. Low 8.
Saturday..Increasing cloudiness late in the morning. Fog patches
 dissipating early in the morning. Wind becoming south 20 km/h late
 in the morning. High 23. Humidex 29. UV index 6 or high.
Saturday night..Overcast. Low 14.

End
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--- up 6 days, 6 hours, 0 minutes
 * Origin: Northern Realms (618:400/23)