Portland Weather in September

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

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

September is in the fall / autumn in Portland and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 21°C (70°F), whilst at night 10°C (50°F) is normal.

Portland weather averages (imperial / metric)
Daytime temperature 21°C 69.8°F
Nightly temperature 9.8°C 49.6°F
Average temperature 15.4°C 59.7°F
Daily sunshine 8.1 hrs
Avg rainfall 81 mm 3.2 ins
Rainy days 9 days
Sea temperature 15.5°C 59.8°F
Humidity 77%
Windspeed 13kph 8 mph

On average September is the 3rd driest month of the year in Portland with around 81mm 3.2 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 Portland

Portland average temperature in September

September rainfall

Portland average rain in September

September hourly sunshine

Portland 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 Portland 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

Portland weather stats

Portland weather statistics
Hottest month: July 25.9°C 78.6°F
Driest month: August 75mm 3ins
Sunniest month: August 9.2hrs
Coldest month: January -0.8°C 30.6°F
Wettest month: November 131mm 5.2ins
Map showing location of Portland (43.66147, -70.25533) Portland map pin © Google

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