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June 12th, 2026 :: 7:15 pm EDT   

Local Weather Report for
Cornwall
Ontario, Canada

 Cornwall Weather Forecast Summary  
 
Today
Jun 12th 		Saturday
Jun 13th 		Sunday
Jun 14th 		Monday
Jun 15th 		Tuesday
Jun 16th
Mostly Sunny Mostly Sunny Thundershowers Mostly Sunny Mix of Cloud and Sun
31°C
 26°C
15°C		 20°C
15°C		 20°C
11°C		 20°C
12°C
 
 Cornwall Detailed Weather Forecast  
 
Friday, June 12th, 2026
Evening Temperature: 22°C
Mostly clear with a chance of showers. Slight chance of a thunderstorm. Windy at times.
Saturday, June 13th, 2026
Overnight Temperature: 16°C
Clear. Windy at times.
Morning Temperature: 21°C
Sunny. Windy at times.
Afternoon Temperature: 26°C
Mostly sunny. Chance of a thunderstorm. Windy at times.
Evening Temperature: 20°C
Clear with cloudy periods. Slight chance of a thunderstorm. Windy at times.
Sunday, June 14th, 2026
Overnight Temperature: 18°C
A mix of cloudy and clear skies. Windy at times.
Morning Temperature: 19°C
Mostly cloudy with a chance of showers or thundershowers.
Afternoon Temperature: 18°C
Cloudy with periods of rain. Windy at times.
Evening Temperature: 16°C
Mostly clear with a few showers. Windy at times.
Monday, June 15th, 2026
Overnight Temperature: 13°C
A mix of cloudy and clear skies. Windy at times.
Morning Temperature: 13°C
A mix of cloud and sun. Windy at times.
Afternoon Temperature: 19°C
Mostly sunny. Windy at times.
Evening Temperature: 15°C
Clear. Windy at times.
Tuesday, June 16th, 2026
Overnight Temperature: 14°C
Clear with cloudy periods. Windy at times.
Morning Temperature: 16°C
Mostly cloudy.
Afternoon Temperature: 20°C
Mostly cloudy with a chance of showers. Slight chance of a thunderstorm. Windy at times.
Evening Temperature: 14°C
Clear with a slight chance of showers or thundershowers.
Wednesday, June 17th, 2026
Overnight Temperature: 10°C
Clear.
Morning Temperature: 19°C
Sunny.
Afternoon Temperature: 25°C
Sunny with cloudy periods. Slight chance of a thunderstorm.
Evening Temperature: 18°C
Mostly clear.
Thursday, June 18th, 2026
Overnight Temperature: 20°C
Mostly clear. Windy at times.
Morning Temperature: 21°C
Cloudy with a slight chance of showers. Windy.
Afternoon Temperature: 19°C
A mix of cloud and sun with a few showers. Windy.
Evening Temperature: 18°C
Clear with showers likely. Windy.
Friday, June 19th, 2026
Overnight Temperature: 15°C
Clear with cloudy periods. Windy at times.
Morning Temperature: 17°C
A mix of sun and cloud with a chance of showers. Slight chance of a thunderstorm. Windy at times.
Afternoon Temperature: 20°C
Sunny with cloudy periods with a chance of showers or thundershowers. Windy at times.
Evening Temperature: 15°C
Mostly clear with a slight chance of showers.
Saturday, June 20th, 2026
Overnight Temperature: 12°C
Clear. Windy at times.
Morning Temperature: 16°C
Mostly sunny. Windy at times.
Afternoon Temperature: 20°C
Sunny with cloudy periods. Windy at times.
Evening Temperature: 15°C
Cloudy with a slight chance of showers.



 

  [ Local Weather Report ]
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5:53 PM  28°C
Overcast
 
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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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