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July 18th, 2025 :: 1:04 am EDT   

Local Weather Report for
Cornwall
Ontario, Canada

 Cornwall Weather Forecast Summary  
 
Today
Jul 18th
Saturday
Jul 19th
Sunday
Jul 20th
Monday
Jul 21st
Tuesday
Jul 22nd
Mix of Cloud and Sun Cloudy Mostly Sunny Cloudy Cloudy
23°C
26°C
14°C
26°C
10°C
21°C
8°C
27°C
14°C
 
 Cornwall Detailed Weather Forecast  
 
Friday, July 18th, 2025
Overnight Temperature: 13°C
Clear.
Morning Temperature: 21°C
Sunny.
Afternoon Temperature: 21°C
Sunny.
Evening Temperature: 15°C
A mix of cloudy and clear skies.
Saturday, July 19th, 2025
Overnight Temperature: 16°C
A mix of cloudy and clear skies.
Morning Temperature: 25°C
Cloudy.
Afternoon Temperature: 23°C
Cloudy.
Evening Temperature: 16°C
Cloudy with a chance of showers.
Sunday, July 20th, 2025
Overnight Temperature: 15°C
Clear.
Morning Temperature: 24°C
Mostly sunny. Windy at times.
Afternoon Temperature: 20°C
Mostly sunny with a chance of showers. Windy at times.
Evening Temperature: 11°C
Clear.
Monday, July 21st, 2025
Overnight Temperature: 10°C
Clear.
Morning Temperature: 18°C
Sunny. Windy at times.
Afternoon Temperature: 19°C
Sunny.
Evening Temperature: 15°C
Cloudy.
Tuesday, July 22nd, 2025
Overnight Temperature: 16°C
Clear.
Morning Temperature: 25°C
Cloudy.
Afternoon Temperature: 25°C
A mix of cloud and sun.
Evening Temperature: 18°C
Cloudy.
Wednesday, July 23rd, 2025
Overnight Temperature: 20°C
Cloudy.
Morning Temperature: 25°C
Cloudy with sunny periods.
Afternoon Temperature: 25°C
A mix of sun and cloud. Windy at times.
Evening Temperature: 23°C
Cloudy with a chance of showers. Windy at times.
Thursday, July 24th, 2025
Overnight Temperature: 20°C
Cloudy with showers likely. Windy at times.
Morning Temperature: 25°C
Cloudy with a chance of showers or thundershowers. Windy at times.
Afternoon Temperature: 26°C
Cloudy with a few showers. Chance of a thunderstorm. Windy at times.
Evening Temperature: 21°C
Cloudy with showers likely. Windy at times.
Friday, July 25th, 2025
Overnight Temperature: 21°C
Cloudy with a slight chance of showers or thundershowers.
Morning Temperature: 28°C
Sunny with cloudy periods. Windy at times.
Afternoon Temperature: 26°C
Sunny with cloudy periods. Windy at times.
Evening Temperature: 17°C
Clear.





 

  [ Local Weather Report ]
Massena, NY 
11:45 PM  16°C
Overcast
 
Lancaster, ON 
 
Apple Hill, ON 
12:00 AM  16°C
 
 
Avondale, ON 
 
Monkland, ON 
12:00 AM  16°C
 
 
South Lancaster, ON 
12:00 AM  18°C
 
 
Glen Gordon, ON 
 
Avonmore, ON 
12:00 AM  16°C
 
 
Sainte Agnes, QC 
12:00 AM  18°C
 
 
Beaver Crossing, QC 
12:00 AM  18°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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