Climate almanac
Groton
Connecticut, United States · 41.35°, -72.08°
What is the weather like in Groton in December?
In December, Groton is typically 44°F (7°C) during the day and 36°F (2°C) at night. The month brings about 5.6 in (142 mm) of precipitation in total. Snowfall averages about 3.3 in (83 mm) over the month.
- Average high44°F (7°C)
- Average low36°F (2°C)
- Precipitation5.6 in (142 mm)
- Clear or mostly clear days9
- Snowfall3.3 in (83 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)