FPCN11 CWTO 051930
Forecasts for Southern Ontario and the National Capital Region issued
by Environment Canada at 3:30 p.m. EDT Sunday 5 October 2025 for
tonight Monday and Monday night.
The next scheduled forecast will be issued at 5:00 a.m. EDT Monday.

City of Toronto.
Tonight..Clear. Low 15.
Monday..Sunny. High 28. Humidex 32. UV index 5 or moderate.
Monday night..Clear in the evening and after midnight then partly
 cloudy with 30 percent chance of showers before morning. Risk of a
 thunderstorm before morning. Low 18.

Windsor - Essex - Chatham-Kent.
Tonight..Clear. Low 15.
Monday..Sunny. High 29. Humidex 34. UV index 6 or high.
Monday night..Increasing cloudiness. 60 percent chance of showers
 overnight with risk of a thunderstorm. Wind becoming southwest
 20 km/h after midnight. Low 18.

Sarnia - Lambton.
Tonight..Clear. Low 15.
Monday..Sunny. High 29. Humidex 34. UV index 5 or moderate.
Monday night..Increasing cloudiness. 60 percent chance of showers
 overnight with risk of a thunderstorm. Low 18.

Elgin.
Tonight..Clear. Low 16.
Monday..Sunny. Wind becoming southwest 20 km/h late in the morning.
 High 27. Humidex 32. UV index 5 or moderate.
Monday night..Increasing cloudiness. 60 percent chance of showers
 overnight with risk of a thunderstorm. Wind becoming southwest
 30 km/h after midnight. Low 18.

London - Middlesex.
Tonight..Clear. Low 15.
Monday..Sunny. Wind becoming southwest 20 km/h in the afternoon.
 High 28. Humidex 32. UV index 5 or moderate.
Monday night..Clear. Increasing cloudiness near midnight then
 60 percent chance of showers overnight. Risk of a thunderstorm
 overnight. Wind southwest 20 km/h becoming light in the evening.
 Low 17.

Simcoe - Delhi - Norfolk.
Tonight..Clear. Low 12.
Monday..Sunny. High 27. Humidex 30. UV index 5 or moderate.
Monday night..A few clouds. Increasing cloudiness after midnight then
 40 percent chance of showers overnight. Risk of a thunderstorm
 before morning. Low 17.

Dunnville - Caledonia - Haldimand.
Tonight..Clear. Low 14.
Monday..Sunny. High 26. Humidex 31. UV index 5 or moderate.
Monday night..Clear. Increasing cloudiness after midnight. Low 18.

Oxford - Brant.
Tonight..Clear. Low 14.
Monday..Sunny. Wind becoming southwest 20 km/h in the afternoon.
 High 28. Humidex 33. UV index 5 or moderate.
Monday night..Clear. Increasing cloudiness near midnight then
 40 percent chance of showers overnight. Risk of a thunderstorm
 before morning. Wind southwest 20 km/h becoming light in the
 evening. Wind becoming southwest 30 after midnight. Low 17.

Niagara Falls - Welland - Southern Niagara Region.
Tonight..Clear. Low 19.
Monday..Sunny. High 26. Humidex 31. UV index 5 or moderate.
Monday night..Clear. Increasing cloudiness after midnight. Wind
 becoming southwest 20 km/h near midnight. Low 19.

St. Catharines - Grimsby - Northern Niagara Region.
Tonight..Clear. Low 16.
Monday..Sunny. Wind becoming southwest 20 km/h late in the afternoon.
 High 27. Humidex 32. UV index 5 or moderate.
Monday night..Clear. Increasing cloudiness after midnight. Wind
 southwest 20 km/h becoming light in the evening. Low 19 with
 temperature rising to 22 by morning.

City of Hamilton.
Tonight..Clear. Low 15.
Monday..Sunny. High 26. Humidex 31. UV index 5 or moderate.
Monday night..Clear in the evening then partly cloudy with 40 percent
 chance of showers overnight. Risk of a thunderstorm before morning.
 Low 18.

Halton - Peel.
Tonight..Clear. Low 15.
Monday..Sunny. High 28. Humidex 32. UV index 5 or moderate.
Monday night..Clear in the evening and after midnight then partly
 cloudy with 30 percent chance of showers before morning. Risk of a
 thunderstorm before morning. Low 18.

York - Durham.
Tonight..Clear. Low 14.
Monday..Sunny. High 28. Humidex 31. UV index 5 or moderate.
Monday night..Clear in the evening and after midnight then partly
 cloudy with 30 percent chance of showers before morning. Risk of a
 thunderstorm before morning. Low 15.

Huron - Perth.
Tonight..Clear. Low 15.
Monday..Sunny. Becoming a mix of sun and cloud in the afternoon. Wind
 becoming southwest 20 km/h in the afternoon. High 28. Humidex 31. UV
 index 5 or moderate.
Monday night..Becoming cloudy in the evening. 60 percent chance of
 showers overnight. Risk of a thunderstorm before morning. Wind
 southwest 20 km/h becoming light in the evening. Low 16.

Kitchener - Cambridge - Region of Waterloo
Guelph - Erin - Southern Wellington County.
Tonight..Clear. Low 13.
Monday..Sunny. Wind becoming southwest 20 km/h in the afternoon.
 High 28. Humidex 31. UV index 5 or moderate.
Monday night..Clear in the evening and after midnight then partly
 cloudy with 40 percent chance of showers overnight. Risk of a
 thunderstorm overnight. Wind southwest 20 km/h becoming light near
 midnight. Low 18.

Mount Forest - Arthur - Northern Wellington County.
Tonight..Clear. Low 16.
Monday..Sunny. Increasing cloudiness late in the afternoon. High 27.
 Humidex 31. UV index 5 or moderate.
Monday night..Partly cloudy. Becoming cloudy after midnight with
 40 percent chance of showers overnight. Risk of a thunderstorm
 overnight. Low 16.

Dufferin - Innisfil.
Tonight..Clear. Low 16.
Monday..Sunny. High 28. Humidex 32. UV index 5 or moderate.
Monday night..Clear in the evening and after midnight then partly
 cloudy with 40 percent chance of showers overnight. Risk of a
 thunderstorm overnight. Low 16.

Saugeen Shores - Kincardine - Southern Bruce County.
Tonight..Clear. Wind becoming south 30 km/h this evening. Low 17.
Monday..Sunny. Wind southwest 30 km/h. High 26. Humidex 31. UV
 index 5 or moderate.
Monday night..Increasing cloudiness. 30 percent chance of showers
 late in the evening and after midnight. Showers beginning after
 midnight. Risk of a thunderstorm overnight. Wind south 20 km/h
 becoming light near midnight. Low 14.

Bruce Peninsula - Sauble Beach - Tobermory.
Tonight..Clear. Low 16.
Monday..Sunny. High 23. Humidex 28. UV index 5 or moderate.
Monday night..Mainly cloudy with 40 percent chance of showers in the
 evening and after midnight. A few showers beginning after midnight.
 Risk of thunderstorms late in the evening and after midnight.
 Low 12.

Hanover - Dundalk - Southern Grey County
Owen Sound - Blue Mountains - Northern Grey County.
Tonight..Clear. Low 17.
Monday..Sunny. Wind becoming southwest 20 km/h late in the morning.
 High 27. Humidex 31. UV index 5 or moderate.
Monday night..Increasing cloudiness. 30 percent chance of showers
 late in the evening and after midnight. Showers beginning after
 midnight. Risk of a thunderstorm overnight. Low 14.

Barrie - Collingwood - Hillsdale.
Tonight..Clear. Low 15.
Monday..Sunny. High 28. Humidex 31. UV index 5 or moderate.
Monday night..Clear in the evening then partly cloudy with 30 percent
 chance of showers late in the evening and after midnight. Showers
 beginning after midnight. Risk of a thunderstorm overnight. Low 16.

Midland - Coldwater - Orr Lake
Orillia - Lagoon City - Washago.
Tonight..Partly cloudy. Clearing late this evening. Low 17.
Monday..Sunny. High 26. Humidex 31. UV index 5 or moderate.
Monday night..Increasing cloudiness. 30 percent chance of showers
 late in the evening and after midnight. Showers beginning after
 midnight. Risk of a thunderstorm overnight. Low 15.

Belleville - Quinte - Northumberland.
Tonight..Clear. Fog patches developing overnight. Low 11.
Monday..Sunny. Fog patches dissipating in the morning. High 26.
 Humidex 30. UV index 5 or moderate.
Monday night..Clear. Low 15.

Picton - Sandbanks Park
Napanee - Consecon.
Tonight..Clear. Fog patches developing overnight. Low 11.
Monday..Sunny. Fog patches dissipating in the morning. High 26.
 Humidex 30. UV index 5 or moderate.
Monday night..Clear. Low 15.

Kingston - Odessa - Frontenac Islands.
Tonight..Clear. Fog patches developing overnight. Low 15.
Monday..Sunny. Fog patches dissipating in the morning. High 23.
 Humidex 28. UV index 5 or moderate.
Monday night..Clear. Becoming partly cloudy after midnight. Low 16.

Lindsay - Southern Kawartha Lakes
Fenelon Falls - Balsam Lake Park - Northern Kawartha Lakes.
Tonight..Clear. Fog patches developing overnight. Low 13.
Monday..Sunny. Fog patches dissipating in the morning. High 27.
 Humidex 32. UV index 5 or moderate.
Monday night..Partly cloudy. 30 percent chance of showers before
 morning. Low 18.

Peterborough City - Lakefield - Southern Peterborough County
Apsley - Woodview - Northern Peterborough County.
Tonight..Clear. Fog patches developing overnight. Low 11.
Monday..Sunny. Fog patches dissipating in the morning. High 27.
 Humidex 31. UV index 5 or moderate.
Monday night..Partly cloudy. 30 percent chance of showers before
 morning. Low 17.

Stirling - Tweed - South Frontenac.
Tonight..Clear. Fog patches developing overnight. Low 11.
Monday..Sunny. Fog patches dissipating in the morning. High 27.
 Humidex 31. UV index 5 or moderate.
Monday night..A few clouds. Low 17.

Bancroft - Bon Echo Park.
Tonight..Clear. Low 10.
Monday..Sunny. High 27. Humidex 30. UV index 5 or moderate.
Monday night..Partly cloudy. 40 percent chance of showers overnight.
 Risk of a thunderstorm before morning. Low 15.

Brockville - Leeds and Grenville.
Tonight..Clear. Low 15.
Monday..Sunny. High 28. Humidex 31. UV index 5 or moderate.
Monday night..Clear. Becoming partly cloudy after midnight. Low 17.

City of Ottawa.
Tonight..Clear. Low 14.
Monday..Sunny. High 30. Humidex 33. UV index 5 or moderate.
Monday night..Clear. Low 17.

Gatineau.
Tonight..Clear. Low 11.
Monday..Sunny. High 30. Humidex 33. UV index 5 or moderate.
Monday night..Clear. Low 15.

Prescott and Russell.
Tonight..Clear. Low 16.
Monday..Sunny. High 28. Humidex 30. UV index 5 or moderate.
Monday night..Clear. Low 19.

Cornwall - Morrisburg.
Tonight..Clear. Low 14.
Monday..Sunny. High 28. Humidex 31. UV index 5 or moderate.
Monday night..Clear. Low 16.

Smiths Falls - Lanark - Sharbot Lake.
Tonight..Clear. Low 12.
Monday..Sunny. High 27. Humidex 30. UV index 5 or moderate.
Monday night..Clear. Low 17.

Port Carling - Port Severn
Bracebridge - Gravenhurst.
Tonight..A few clouds. Low 15.
Monday..Sunny. High 27. Humidex 30. UV index 5 or moderate.
Monday night..Increasing cloudiness. 40 percent chance of showers in
 the evening. A few showers beginning near midnight. Risk of a
 thunderstorm overnight. Low 16.

Town of Parry Sound - Rosseau - Killbear Park
Huntsville - Baysville.
Tonight..Clear. Low 17.
Monday..Sunny. High 25. Humidex 30. UV index 5 or moderate.
Monday night..Becoming cloudy in the evening with 40 percent chance
 of showers later in the evening. A few showers beginning near
 midnight. Risk of a thunderstorm overnight. Low 14.

Haliburton.
Tonight..Clear. Low 15.
Monday..Sunny. Becoming a mix of sun and cloud in the afternoon.
 High 25. Humidex 29. UV index 5 or moderate.
Monday night..Partly cloudy. Becoming cloudy after midnight with
 40 percent chance of showers overnight. Risk of a thunderstorm
 before morning. Low 15.

Renfrew - Pembroke - Barry's Bay.
Tonight..Clear. Low 17.
Monday..Sunny. High 28. Humidex 30. UV index 5 or moderate.
Monday night..Clear. Increasing cloudiness after midnight then
 40 percent chance of showers overnight. Risk of a thunderstorm
 before morning. Low 17.

Algonquin.
Tonight..Clear. Low 12.
Monday..Sunny. High 26. Humidex 29. UV index 5 or moderate.
Monday night..Increasing cloudiness. 30 percent chance of showers
 late in the evening and after midnight. A few showers beginning
 overnight. Risk of a thunderstorm overnight. Low 14.

Burk's Falls - Bayfield Inlet.
Tonight..Partly cloudy. Becoming clear near midnight. Low 17.
Monday..Sunny. High 25. Humidex 29. UV index 5 or moderate.
Monday night..Increasing cloudiness. 40 percent chance of showers in
 the evening. A few showers beginning near midnight. Risk of a
 thunderstorm overnight. Low 12.

End
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--- up 3 days, 12 hours, 27 minutes
 * Origin: Northern Realms (618:400/23)