Edgartown Weather in September

What's the weather like in Edgartown (Massachusetts) in September 2025?

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

September is in the fall / autumn in Edgartown and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 22°C (71°F), whilst at night 14°C (57°F) is normal.

Edgartown weather averages (imperial / metric)
Daytime temperature 21.8°C 71.2°F
Nightly temperature 13.9°C 56.9°F
Average temperature 17.8°C 64°F
Daily sunshine 8.2 hrs
Avg rainfall 88 mm 3.5 ins
Rainy days 8 days
Sea temperature 18.4°C 65.2°F
Humidity 75%
Windspeed 15.5kph 10 mph

On average September is the 4th driest month of the year in Edgartown with around 88mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.2 hours of sunshine per day.

September temperatures in Edgartown

Edgartown average temperature in September

September rainfall

Edgartown average rain in September

September hourly sunshine

Edgartown 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 Edgartown 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

Edgartown weather stats

Edgartown weather statistics
Hottest month: July 25.5°C 77.9°F
Driest month: June 68mm 2.7ins
Sunniest month: October 7.4hrs
Coldest month: January 2.7°C 36.9°F
Wettest month: December 117mm 4.6ins
Map showing location of Edgartown (41.38901, -70.51336) Edgartown map pin © Google

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