Climate almanac
Helena
Montana, United States · 46.59°, -112.04°
What is the weather like in Helena in December?
In December, Helena is typically 31°F (-1°C) during the day and 16°F (-9°C) at night. The month brings about 1.3 in (34 mm) of precipitation in total. Snowfall averages about 8.3 in (211 mm) over the month.
- Average high31°F (-1°C)
- Average low16°F (-9°C)
- Precipitation1.3 in (34 mm)
- Clear or mostly clear days4
- Snowfall8.3 in (211 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)