Connecticut weather in December: Statewide normals and every place, NOAA 1991-2020
In December, Connecticut's statewide normal high is 41°F and normal low 24°F; normal highs run from 35°F in Norfolk to 44°F in Groton (NOAA 1991-2020 normals).
- Statewide normal high
- 41°FDecember, 1991-2020
- Statewide normal low
- 24°FDecember, 1991-2020
- Statewide normal precipitation
- 4.37 inDecember
- Warmest place
- 44°Fnormal high, Groton
- Coolest place
- 35°Fnormal high, Norfolk
Where is Connecticut warmest and wettest in December?
Groton has the warmest December afternoons (44°F) and Norfolk the coolest (35°F). Norwich gets the most precipitation (4.97 in) and Groton the least (3.13 in). The most snow falls in Norfolk (15.0 inches).
Statewide, December averaged 37.0°F in 2021, 33.5°F in 2022, 38.5°F in 2023, 31.6°F in 2024, 28.6°F in 2025, against a 1991-2020 normal of 32.7°F.
| Place | High | Low | Precip. | Snow |
|---|---|---|---|---|
| Bridgeport | 44°F | 30°F | 3.98 | 5.5 |
| Stamford | 43°F | 27°F | 4.44 | 5.8 |
| New Haven | 44°F | 29°F | 3.53 | – |
| Hartford | 41°F | 25°F | 4.08 | 10.1 |
| Danbury | 41°F | 24°F | 4.24 | – |
| Meriden | 42°F | 25°F | 4.12 | – |
| Norwich | 43°F | 27°F | 4.97 | 5.6 |
| Ansonia | 41°F | 23°F | 4.57 | – |
| Willimantic | 41°F | 24°F | 3.68 | – |
| Storrs | 40°F | 25°F | 4.50 | 7.2 |
| Groton | 44°F | 29°F | 3.13 | – |
| Norfolk | 35°F | 21°F | 4.86 | 15.0 |
| Falls Village | 40°F | 20°F | 3.75 | – |
| Bakersville | 38°F | 21°F | 5.00 | 12.0 |
| Barkhamsted | 39°F | 21°F | 4.64 | 10.0 |
| Burlington | 41°F | 24°F | 4.81 | 8.3 |
| Hampton | 41°F | 23°F | 4.78 | – |
| Mount Carmel | 42°F | 27°F | 4.51 | – |
| Staffordville | 39°F | 21°F | 4.47 | – |
| West Thompson Lake | 40°F | 22°F | 4.72 | 6.5 |
Source: NOAA NCEI nClimDiv statewide normals; NOAA NCEI 1991-2020 monthly normals for each station.