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Sarnia Weather in August
Sarnia in August averages 26°C (79°F) during the day and 18°C (64°F) at night. This is part of the summer season, and quite a bit of rainfall is expected this month.
Rainfall in Sarnia in August
Rain is expected on roughly 9 days, totalling around 78 mm (3.1 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Sarnia in August
August in Sarnia is generally excellent, with days reaching 26°C (79°F) and nights settling around 18°C (64°F). August is known for being in the summer season. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights drop to around 18°C (64°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.If your ideal day consists of dry skies and pleasant temperatures, June, July, August and September typically offer the best circumstances for Sarnia.
Sarnia Temperature in August
Min Temperature
18°C (64°F)
Max Temperature
26°C (79°F)
Chance of Rain
31%
Precipitation
78 mm (3.1 in)
Rainy days
9 days
Sarnia Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Sarnia - and find the best time to visit.
Best Places in Canada in August
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in August →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Sarnia in August
Warm temperatures in August make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Rain gear is recommended, you can expect wet weather on multiple days.
What To Do in Sarnia in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling7/10 -
Walking7/10 -
Camping8/10 -
Outdoor sports7/10
Sarnia 3-Day Forecast
More climate data for Sarnia
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Where to go in August - average daytime high across popular destinations.
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