Climate almanac
Troy
Illinois, United States · 38.73°, -89.88°
What is the weather like in Troy in December?
In December, Troy is typically 47°F (8°C) during the day and 31°F (0°C) at night. The month brings about 2.5 in (64 mm) of precipitation in total. Snowfall averages about 1.4 in (37 mm) over the month.
- Average high47°F (8°C)
- Average low31°F (0°C)
- Precipitation2.5 in (64 mm)
- Clear or mostly clear days8
- Snowfall1.4 in (37 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)