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August 4th, 2025 :: 3:49 am EDT   

Local Weather Report for
Sarnia
Ontario, Canada

 Current Sarnia Weather Conditions Updated August 4th at 3:00 am 
mist
Temperature:59°F Dew Point:59°F
Barometer:30.15 inHg Wind:N 4 Mph
Humidity:100.0% Visibility:0M
 
 Sarnia Weather Forecast Summary  
 
Today
Aug 4th
Tuesday
Aug 5th
Wednesday
Aug 6th
Thursday
Aug 7th
Friday
Aug 8th
Cloudy Mix of Cloud and Sun Cloudy Cloudy Mostly Sunny
79°F
86°F
63°F
85°F
64°F
86°F
64°F
90°F
67°F
 
 Sarnia Detailed Weather Forecast  
 
Monday, August 4th, 2025
Overnight Temperature: 62°F
Clear.
Morning Temperature: 79°F
Cloudy. Windy at times.
Afternoon Temperature: 74°F
Cloudy. Windy at times.
Evening Temperature: 64°F
Cloudy.
Tuesday, August 5th, 2025
Overnight Temperature: 65°F
A mix of cloudy and clear skies.
Morning Temperature: 83°F
A mix of cloud and sun.
Afternoon Temperature: 80°F
Sunny.
Evening Temperature: 67°F
A mix of clear and cloudy skies.
Wednesday, August 6th, 2025
Overnight Temperature: 66°F
Cloudy.
Morning Temperature: 82°F
Mostly sunny. Windy at times.
Afternoon Temperature: 80°F
Cloudy. Windy at times.
Evening Temperature: 68°F
Clear with cloudy periods. Windy at times.
Thursday, August 7th, 2025
Overnight Temperature: 66°F
Clear. Windy at times.
Morning Temperature: 83°F
Sunny. Windy at times.
Afternoon Temperature: 82°F
Cloudy. Windy at times.
Evening Temperature: 69°F
Clear with cloudy periods. Windy at times.
Friday, August 8th, 2025
Overnight Temperature: 69°F
Mostly clear.
Morning Temperature: 87°F
Sunny. Slight chance of a thunderstorm. Windy at times.
Afternoon Temperature: 86°F
Sunny. Slight chance of a thunderstorm. Windy.
Evening Temperature: 72°F
Clear. Windy at times.
Saturday, August 9th, 2025
Overnight Temperature: 72°F
Clear. Slight chance of a thunderstorm.
Morning Temperature: 88°F
Sunny. Chance of a thunderstorm. Windy at times.
Afternoon Temperature: 87°F
A mix of cloud and sun. Slight chance of a thunderstorm. Windy at times.
Evening Temperature: 72°F
Clear. Slight chance of a thunderstorm. Windy at times.
Sunday, August 10th, 2025
Overnight Temperature: 72°F
A mix of cloudy and clear skies. Slight chance of a thunderstorm.
Morning Temperature: 89°F
Sunny with cloudy periods. Chance of a thunderstorm. Windy.
Afternoon Temperature: 87°F
A mix of cloud and sun. Chance of a thunderstorm. Windy.
Evening Temperature: 72°F
A mix of cloudy and clear skies with showers likely. Chance of a thunderstorm. Windy at times.
Monday, August 11th, 2025
Overnight Temperature: 70°F
Clear. Slight chance of a thunderstorm.
Morning Temperature: 83°F
Sunny with cloudy periods with a chance of showers or thundershowers. Windy at times.
Afternoon Temperature: 87°F
Sunny with cloudy periods. Slight chance of a thunderstorm. Windy at times.
Evening Temperature: 74°F
Clear. Windy at times.
Tuesday, August 12th, 2025
Overnight Temperature: 71°F
Cloudy. Slight chance of a thunderstorm. Windy at times.
Morning Temperature: 85°F
Cloudy with a chance of showers or thundershowers. Windy.
Afternoon Temperature: 83°F
Cloudy. Slight chance of a thunderstorm. Windy.
Evening Temperature: 73°F
Cloudy with a slight chance of showers. Windy at times.





 

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This WeatherCity Weather Forecast for Sarnia, 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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