Danbury Weather in September

What's the weather like in Danbury (Connecticut) in September 2025?

The climate in Danbury during September can be summarized as mild and damp.

September is in the fall / autumn in Danbury and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 23°C (73°F), whilst at night 11°C (51°F) is normal.

Danbury weather averages (imperial / metric)
Daytime temperature 22.9°C 73.1°F
Nightly temperature 10.8°C 51.4°F
Average temperature 16.8°C 62.2°F
Daily sunshine 7.8 hrs
Avg rainfall 101 mm 4 ins
Rainy days 9 days
Sea temperature 20°C 68°F
Humidity 73%
Windspeed 15.5kph 10 mph

On average September is the 6th driest month of the year in Danbury with around 101mm 4 inches of rain making it a damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.8 hours of sunshine per day.

September temperatures in Danbury

Danbury average temperature in September

September rainfall

Danbury average rain in September

September hourly sunshine

Danbury average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Danbury in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Danbury weather stats

Danbury weather statistics
Hottest month: July 27.5°C 81.5°F
Driest month: February 83mm 3.3ins
Sunniest month: August 9hrs
Coldest month: January 0.9°C 33.6°F
Wettest month: August 111mm 4.4ins
Map showing location of Danbury (41.39482, -73.45401) Danbury map pin © Google

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