Sarnia Weather in August

What's the weather like in Sarnia (Ontario) in August 2024?

The climate in Sarnia during August can be summarized as warm, humid and reasonably dry.

August is in the summer in Sarnia and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a muggy 26°C (79°F), whilst at night 16°C (60°F) is normal.

Sarnia weather averages (imperial / metric)
Daytime temperature 26°C 78.8°F
Nightly temperature 15.6°C 60.1°F
Average temperature 20.8°C 69.4°F
Daily sunshine 8.2 hrs
Avg rainfall 71 mm 2.8 ins
Rainy days 9 days
Sea temperature 23°C 73.5°F
Humidity 75%
Windspeed 12.2kph 8 mph

On average August is the 6th driest month of the year in Sarnia with around 71mm 2.8 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.2 hours of sunshine per day.

August temperatures in Sarnia

Sarnia average temperature in August

August rainfall

Sarnia average rain in August

August hourly sunshine

Sarnia average rain in August

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Sarnia in August 2024.

Other monthly averages

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UV index Best time to go?

Sarnia weather stats

Sarnia weather statistics
Hottest month: July 26.5°C 79.7°F
Driest month: February 54mm 2.1ins
Sunniest month: July 9.9hrs
Coldest month: January -1.9°C 28.6°F
Wettest month: June 82mm 3.2ins
Map showing location of Sarnia (42.97866, -82.40407) Sarnia map pin © Google

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