Average Temperatures for Connecticut in December

Average temperatures for December at cities and towns throughout Connecticut are listed below in degrees Fahrenheit and Celsius.

You can jump to a separate table for places in Coastal Connecticut and Inland Connecticut.

The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Coastal Connecticut

Average December temperatures
High °F Low °F Place High °C Low °C
44 30 Bridgeport 7 -1
44 30 Groton 7 -1
44 29 New Haven 7 -2
44 29 New London 7 -2
43 27 Norwich 6 -3
43 27 Stamford 6 -3

Inland Connecticut

Average daily temperatures in December
High °F Low °F Place High °C Low °C
41 24 Burlington 5 -4
40 26 Danbury 5 -3
41 25 Hartford 5 -4
35 21 Norfolk 1 -6
39 21 Staffordville 4 -6
38 21 Torrington 3 -6
40 22 West Thompson Lake 5 -6
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Connecticut Temperatures
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