Climate almanac
Helena
Montana, United States · 46.59°, -112.04°
What is the weather like in Helena in May?
In May, Helena is typically 61°F (16°C) during the day and 38°F (3°C) at night. The month brings about 3.5 in (88 mm) of precipitation in total. Snowfall averages about 4.5 in (115 mm) over the month.
- Average high61°F (16°C)
- Average low38°F (3°C)
- Precipitation3.5 in (88 mm)
- Clear or mostly clear days8
- Snowfall4.5 in (115 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)