Climate almanac
Alliston
Ontario, Canada · 44.15°, -79.87°
What is the weather like in Alliston in December?
In December, Alliston is typically 34°F (1°C) during the day and 22°F (-5°C) at night. The month brings about 3.0 in (76 mm) of precipitation in total. Snowfall averages about 12 in (298 mm) over the month.
- Average high34°F (1°C)
- Average low22°F (-5°C)
- Precipitation3.0 in (76 mm)
- Clear or mostly clear days1
- Snowfall12 in (298 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)