Climate almanac
Mason City
Iowa, United States · 43.15°, -93.20°
What is the weather like in Mason City in December?
In December, Mason City is typically 33°F (1°C) during the day and 19°F (-7°C) at night. The month brings about 1.6 in (40 mm) of precipitation in total. Snowfall averages about 6.1 in (155 mm) over the month.
- Average high33°F (1°C)
- Average low19°F (-7°C)
- Precipitation1.6 in (40 mm)
- Clear or mostly clear days5
- Snowfall6.1 in (155 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)