Climate almanac
St. Marys
Ontario, Canada · 43.25°, -81.13°
What is the weather like in St. Marys in March?
In March, St. Marys is typically 43°F (6°C) during the day and 27°F (-3°C) at night. The month brings about 3.7 in (93 mm) of precipitation in total. Snowfall averages about 6.6 in (169 mm) over the month.
- Average high43°F (6°C)
- Average low27°F (-3°C)
- Precipitation3.7 in (93 mm)
- Clear or mostly clear days6
- Snowfall6.6 in (169 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)