Climate almanac
Sarnia
Ontario, Canada · 42.98°, -82.40°
What is the weather like in Sarnia in August?
In August, Sarnia is typically 78°F (26°C) during the day and 65°F (18°C) at night. The month brings about 3.3 in (85 mm) of precipitation in total.
- Average high78°F (26°C)
- Average low65°F (18°C)
- Precipitation3.3 in (85 mm)
- Clear or mostly clear days12
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)