Climate almanac
London
Ontario, Canada · 42.98°, -81.23°
What is the weather like in London in May?
In May, London is typically 67°F (20°C) during the day and 48°F (9°C) at night. The month brings about 3.3 in (85 mm) of precipitation in total. Snowfall averages about 0.1 in (3 mm) over the month.
- Average high67°F (20°C)
- Average low48°F (9°C)
- Precipitation3.3 in (85 mm)
- Clear or mostly clear days9
- Snowfall0.1 in (3 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)