Climate almanac
Castle Rock
Colorado, United States · 39.37°, -104.86°
What is the weather like in Castle Rock in December?
In December, Castle Rock is typically 45°F (7°C) during the day and 19°F (-7°C) at night. The month brings about 0.6 in (15 mm) of precipitation in total. Snowfall averages about 3.9 in (98 mm) over the month.
- Average high45°F (7°C)
- Average low19°F (-7°C)
- Precipitation0.6 in (15 mm)
- Clear or mostly clear days18
- Snowfall3.9 in (98 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)