Climate almanac
Sarnia
Ontario, Canada · 42.98°, -82.40°
What is the weather like in Sarnia in December?
In December, Sarnia is typically 37°F (3°C) during the day and 28°F (-2°C) at night. The month brings about 2.5 in (63 mm) of precipitation in total. Snowfall averages about 6.0 in (152 mm) over the month.
- Average high37°F (3°C)
- Average low28°F (-2°C)
- Precipitation2.5 in (63 mm)
- Clear or mostly clear days2
- Snowfall6.0 in (152 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)