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August 28th, 2025 :: 6:43 pm EDT   

Local Weather Report for
Cornwall
Ontario, Canada

 Cornwall Weather Forecast Summary  
 
Today
Aug 28th
Friday
Aug 29th
Saturday
Aug 30th
Sunday
Aug 31st
Monday
Sep 1st
Showers Showers Cloudy Sunny Cloudy
17°C
17°C
8°C
16°C
8°C
23°C
8°C
25°C
11°C
 
 Cornwall Detailed Weather Forecast  
 
Thursday, August 28th, 2025
Evening Temperature: 13°C
Cloudy with a few showers.
Friday, August 29th, 2025
Overnight Temperature: 12°C
Cloudy with periods of rain.
Morning Temperature: 15°C
Cloudy with a slight chance of showers or thundershowers.
Afternoon Temperature: 14°C
Sunny with cloudy periods with showers likely. Slight chance of a thunderstorm.
Evening Temperature: 9°C
Clear with cloudy periods.
Saturday, August 30th, 2025
Overnight Temperature: 9°C
Cloudy.
Morning Temperature: 15°C
Cloudy. Windy at times.
Afternoon Temperature: 14°C
A mix of cloud and sun. Windy at times.
Evening Temperature: 9°C
Clear.
Sunday, August 31st, 2025
Overnight Temperature: 9°C
Clear.
Morning Temperature: 21°C
Sunny.
Afternoon Temperature: 19°C
Sunny.
Evening Temperature: 13°C
Clear.
Monday, September 1st, 2025
Overnight Temperature: 12°C
Clear.
Morning Temperature: 23°C
Sunny.
Afternoon Temperature: 21°C
Cloudy.
Evening Temperature: 15°C
Cloudy.
Tuesday, September 2nd, 2025
Overnight Temperature: 15°C
Cloudy.
Morning Temperature: 24°C
Cloudy.
Afternoon Temperature: 21°C
Cloudy with sunny periods. Chance of a thunderstorm.
Evening Temperature: 17°C
A mix of cloudy and clear skies.
Wednesday, September 3rd, 2025
Overnight Temperature: 16°C
Cloudy.
Morning Temperature: 25°C
Cloudy.
Afternoon Temperature: 20°C
Cloudy.
Evening Temperature: 18°C
Cloudy.
Thursday, September 4th, 2025
Overnight Temperature: 17°C
Cloudy.
Morning Temperature: 18°C
Cloudy.
Afternoon Temperature: 20°C
A mix of cloud and sun.
Evening Temperature: 16°C
Cloudy with a slight chance of showers.
Friday, September 5th, 2025
Overnight Temperature: 16°C
Cloudy with showers likely.
Morning Temperature: 16°C
Cloudy with showers.
Afternoon Temperature: 17°C
Cloudy with showers likely.
Evening Temperature: 15°C
Clear with cloudy periods with showers likely.





 

  [ Local Weather Report ]
Massena, NY 
5:53 PM  17°C
Overcast
 
Lancaster, ON 
 
Apple Hill, ON 
6:00 PM  16°C
 
 
Avondale, ON 
 
Monkland, ON 
6:00 PM  16°C
 
 
South Lancaster, ON 
6:00 PM  16°C
 
 
Glen Gordon, ON 
 
Avonmore, ON 
6:00 PM  16°C
 
 
Sainte Agnes, QC 
6:00 PM  16°C
 
 
Beaver Crossing, QC 
6:00 PM  16°C
 

This WeatherCity Weather Forecast for Cornwall, Ontario, Canada is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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