Climate almanac
Cornwall
Ontario, Canada · 45.02°, -74.73°
What is the weather like in Cornwall in January?
In January, Cornwall is typically 27°F (-3°C) during the day and 14°F (-10°C) at night. The month brings about 3.4 in (87 mm) of precipitation in total. Snowfall averages about 15 in (383 mm) over the month.
- Average high27°F (-3°C)
- Average low14°F (-10°C)
- Precipitation3.4 in (87 mm)
- Clear or mostly clear days3
- Snowfall15 in (383 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)