Deer Isle Weather in September

What's the weather like in Deer Isle (Maine) in September 2024?

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

September is in the fall / autumn in Deer Isle and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 21°C (69°F), whilst at night 10°C (50°F) is normal.

Deer Isle weather averages (imperial / metric)
Daytime temperature 20.6°C 69.1°F
Nightly temperature 9.8°C 49.6°F
Average temperature 15.2°C 59.4°F
Daily sunshine 7.1 hrs
Avg rainfall 99 mm 3.9 ins
Rainy days 10 days
Sea temperature 13.3°C 55.9°F
Humidity 79%
Windspeed 13kph 8 mph

On average September is the 6th driest month of the year in Deer Isle with around 99mm 3.9 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.1 hours of sunshine per day.

September temperatures in Deer Isle

Deer Isle average temperature in September

September rainfall

Deer Isle average rain in September

September hourly sunshine

Deer Isle 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 Deer Isle 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

Deer Isle weather stats

Deer Isle weather statistics
Hottest month: July 25.7°C 78.3°F
Driest month: August 77mm 3ins
Sunniest month: August 8.2hrs
Coldest month: January -1.6°C 29.1°F
Wettest month: November 130mm 5.1ins
Map showing location of Deer Isle (44.22397, -68.67753) Deer Isle map pin © Google

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