Climate almanac
Decatur
Indiana, United States · 40.83°, -84.93°
What is the weather like in Decatur in December?
In December, Decatur is typically 41°F (5°C) during the day and 28°F (-2°C) at night. The month brings about 2.7 in (69 mm) of precipitation in total. Snowfall averages about 2.9 in (75 mm) over the month.
- Average high41°F (5°C)
- Average low28°F (-2°C)
- Precipitation2.7 in (69 mm)
- Clear or mostly clear days5
- Snowfall2.9 in (75 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)