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May 16th, 2026 :: 2:19 pm EDT   

Local Weather Report for
Grand Valley
Ontario, Canada

 Grand Valley Weather Forecast Summary  
 
Today
May 16th
Sunday
May 17th
Monday
May 18th
Tuesday
May 19th
Wednesday
May 20th
Mostly Sunny Mix of Sun and Cloud Mix of Sun and Cloud Mix of Cloud and Sun Mix of Cloud and Sun
17°C
22°C
10°C
27°C
14°C
27°C
19°C
18°C
6°C
 
 Grand Valley Detailed Weather Forecast  
 
Saturday, May 16th, 2026
Afternoon Temperature: 16°C
A mix of cloud and sun with a slight chance of showers. Windy.
Evening Temperature: 15°C
Mostly clear. Windy at times.
Sunday, May 17th, 2026
Overnight Temperature: 11°C
Clear.
Morning Temperature: 16°C
Mostly sunny.
Afternoon Temperature: 22°C
Sunny with cloudy periods.
Evening Temperature: 16°C
Cloudy.
Monday, May 18th, 2026
Overnight Temperature: 14°C
Mostly cloudy with a chance of showers.
Morning Temperature: 20°C
A mix of cloud and sun. Chance of a thunderstorm. Windy at times.
Afternoon Temperature: 26°C
Mostly sunny. Chance of a thunderstorm. Windy.
Evening Temperature: 22°C
A mix of clear and cloudy skies with a slight chance of showers or thundershowers. Windy.
Tuesday, May 19th, 2026
Overnight Temperature: 19°C
A mix of cloudy and clear skies with a chance of showers. Slight chance of a thunderstorm. Windy.
Morning Temperature: 22°C
Mostly sunny with a chance of showers or thundershowers. Windy.
Afternoon Temperature: 26°C
A mix of cloud and sun with a slight chance of showers or thundershowers. Windy.
Evening Temperature: 21°C
Mostly cloudy with a slight chance of showers or thundershowers. Windy.
Wednesday, May 20th, 2026
Overnight Temperature: 18°C
Mostly cloudy with showers likely.
Morning Temperature: 12°C
A mix of cloud and sun with a chance of showers. Windy at times.
Afternoon Temperature: 13°C
Mostly sunny. Windy.
Evening Temperature: 7°C
A mix of cloudy and clear skies. Windy at times.
Thursday, May 21st, 2026
Overnight Temperature: 3°C
Mostly clear. Windy at times.
Morning Temperature: 6°C
Sunny with cloudy periods. Windy at times.
Afternoon Temperature: 11°C
Sunny with cloudy periods. Windy at times.
Evening Temperature: 5°C
Mostly clear.
Friday, May 22nd, 2026
Overnight Temperature: 2°C
Clear.
Morning Temperature: 9°C
Sunny.
Afternoon Temperature: 14°C
Sunny.
Evening Temperature: 8°C
Clear.
Saturday, May 23rd, 2026
Overnight Temperature: 5°C
Clear.
Morning Temperature: 12°C
A mix of cloud and sun. Windy at times.
Afternoon Temperature: 17°C
Mostly sunny. Windy at times.
Evening Temperature: 11°C
Mostly clear.
Sunday, May 24th, 2026
Overnight Temperature: 8°C
Mostly clear.
Morning Temperature: 16°C
Mostly sunny. Windy at times.
Afternoon Temperature: 22°C
Mostly sunny. Windy at times.
Evening Temperature: 18°C
Clear. Windy at times.





 

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This WeatherCity Weather Forecast for Grand Valley, 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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