Climate almanac
St. Thomas
Ontario, Canada · 42.77°, -81.18°
What is the weather like in St. Thomas in May?
In May, St. Thomas is typically 62°F (17°C) during the day and 50°F (10°C) at night. The month brings about 3.3 in (83 mm) of precipitation in total.
- Average high62°F (17°C)
- Average low50°F (10°C)
- Precipitation3.3 in (83 mm)
- Clear or mostly clear days9
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)