Average Temperatures for Connecticut in September

Average temperatures for September 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 September temperatures
High °F Low °F Place High °C Low °C
75 60 Bridgeport 24 15
74 58 Groton 23 14
75 57 New Haven 24 14
74 57 New London 23 14
76 55 Norwich 24 13
76 56 Stamford 24 13

Inland Connecticut

Average daily temperatures in September
High °F Low °F Place High °C Low °C
75 53 Burlington 24 11
75 55 Danbury 24 13
76 54 Hartford 24 12
69 51 Norfolk 21 11
73 51 Staffordville 23 10
72 49 Torrington 22 10
73 51 West Thompson Lake 23 10
Reference

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

Connecticut Temperatures
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