Climate almanac
St. Catharines
Ontario, Canada · 43.17°, -79.24°
What is the weather like in St. Catharines in December?
In December, St. Catharines is typically 38°F (3°C) during the day and 31°F (-1°C) at night. The month brings about 3.5 in (89 mm) of precipitation in total. Snowfall averages about 7.5 in (189 mm) over the month.
- Average high38°F (3°C)
- Average low31°F (-1°C)
- Precipitation3.5 in (89 mm)
- Clear or mostly clear days2
- Snowfall7.5 in (189 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)