Climate almanac
Decorah
Iowa, United States · 43.30°, -91.79°
What is the weather like in Decorah in December?
In December, Decorah is typically 33°F (1°C) during the day and 20°F (-7°C) at night. The month brings about 1.8 in (45 mm) of precipitation in total. Snowfall averages about 6.6 in (168 mm) over the month.
- Average high33°F (1°C)
- Average low20°F (-7°C)
- Precipitation1.8 in (45 mm)
- Clear or mostly clear days6
- Snowfall6.6 in (168 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)