Climate almanac
Lewistown
Montana, United States · 47.06°, -109.43°
What is the weather like in Lewistown in May?
In May, Lewistown is typically 62°F (17°C) during the day and 41°F (5°C) at night. The month brings about 3.6 in (91 mm) of precipitation in total. Snowfall averages about 4.6 in (118 mm) over the month.
- Average high62°F (17°C)
- Average low41°F (5°C)
- Precipitation3.6 in (91 mm)
- Clear or mostly clear days9
- Snowfall4.6 in (118 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)