United States · 1991–2020 normal
Groton in
December.
Typical December weather in Groton: 6.9°C by day, -1.6°C at night, 119 mm of rain over 10.3 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high6.9°C
Typical low-1.6°C
Rain119 mm
Wet days10.3
Comfort score 5 this month (June leads the year at 87). Daylight is calculated as 9 h 12 from latitude 41.35°. Open-water sea temperature is 9.0°C (25 km from the place centre).
Event window
Frost-level nights in December
The measured night-time normal is -1.6°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4835461
- NOAA station
- USC00063207 · GROTON
- Station distance
- 3.4 km from the place centre
- Coverage
- Good coverage · 23 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.