Chelmsford Weather in September

What's the weather like in Chelmsford (Massachusetts) in September 2024?

The climate in Chelmsford during September can be summarized as mild and a little damp.

September is in the fall / autumn in Chelmsford and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 23°C (73°F), whilst at night 10°C (50°F) is normal.

Chelmsford weather averages (imperial / metric)
Daytime temperature 22.6°C 72.6°F
Nightly temperature 10.1°C 50.1°F
Average temperature 16.3°C 61.3°F
Daily sunshine 8.1 hrs
Avg rainfall 89 mm 3.5 ins
Rainy days 9 days
Sea temperature 17.8°C 64.1°F
Humidity 74%
Windspeed 13.3kph 8 mph

On average September is the 4th driest month of the year in Chelmsford with around 89mm 3.5 inches of rain making it a a little 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 8.1 hours of sunshine per day.

September temperatures in Chelmsford

Chelmsford average temperature in September

September rainfall

Chelmsford average rain in September

September hourly sunshine

Chelmsford 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 Chelmsford in September 2024.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Chelmsford weather stats

Chelmsford weather statistics
Hottest month: July 27.8°C 82°F
Driest month: February 87mm 3.4ins
Sunniest month: July 10.1hrs
Coldest month: January 0.4°C 32.7°F
Wettest month: November 116mm 4.6ins
Map showing location of Chelmsford (42.59981, -71.36728) Chelmsford map pin © Google

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