Climate almanac
London
Ontario, Canada · 42.98°, -81.23°
What is the weather like in London in December?
In December, London is typically 36°F (2°C) during the day and 26°F (-3°C) at night. The month brings about 3.3 in (83 mm) of precipitation in total. Snowfall averages about 9.2 in (234 mm) over the month.
- Average high36°F (2°C)
- Average low26°F (-3°C)
- Precipitation3.3 in (83 mm)
- Clear or mostly clear days1
- Snowfall9.2 in (234 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)