Average Rainfall for Connecticut in September
The tables below give monthly averages for rainfall during September at cities and towns in Connecticut.
Each place has a total for the amount of precipitation it usually receives this month. There is also a count of the number of days with wet weather, when precipitation amounts to 0.01 inches (0.25 millimetres) or more.
The rainfall totals are averages based on weather data collected from 1991 to 2020 for the US National Centers for Environmental Information.
You can jump to a separate table for places in Coastal Connecticut and Inland Connecticut.
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NOAA National Centers for Environmental Information (NCEI). Climate Normals.