Climate almanac
Great Falls
Montana, United States · 47.50°, -111.30°
What is the weather like in Great Falls in May?
In May, Great Falls is typically 68°F (20°C) during the day and 45°F (7°C) at night. The month brings about 2.6 in (67 mm) of precipitation in total. Snowfall averages about 1.8 in (47 mm) over the month.
- Average high68°F (20°C)
- Average low45°F (7°C)
- Precipitation2.6 in (67 mm)
- Clear or mostly clear days9
- Snowfall1.8 in (47 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)