Climate almanac
St. Thomas
Ontario, Canada · 42.77°, -81.18°
What is the weather like in St. Thomas in March?
In March, St. Thomas is typically 41°F (5°C) during the day and 30°F (-1°C) at night. The month brings about 3.7 in (93 mm) of precipitation in total. Snowfall averages about 4.5 in (115 mm) over the month.
- Average high41°F (5°C)
- Average low30°F (-1°C)
- Precipitation3.7 in (93 mm)
- Clear or mostly clear days6
- Snowfall4.5 in (115 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)