Weather in Maine, United States in September

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Visiting Maine, United States in September

September is one of the best months to visit Maine for the best beach weather. It has the most sunshine and best sunbathing and swimming conditions of the year.

The weather in September is cooler than the previous month and temperatures continue to drop markedly into October. September has average maximum temperatures of 22°C (71°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 46% making it quite sunny but with regular periods of cloudy and overcast skies. There are 5.8 hours of sunshine per day.

September has total rainfall of 8.7cm (3.4inches) making it mostly dry with only light showers. There are just 9.9 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days.

Sea temperatures are a cold 15°C (58°F). September is too cold for swimming in Maine for any length of time, unless you have a wetsuit. The sea temperature in September is marginally cooler than the previous month and temperatures continue to drop slightly into October.

Also consider visiting Maine in one of the other best months of June, July, August, for the best beach weather. Also consider one of our other suggestions for September.

Can you sunbathe in Maine in September?

Yes, September is a good time for sunbathing in Maine.

September has average maximum temperatures of 22°C (71°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 46% making it quite sunny but with regular periods of cloudy and overcast skies. There are 5.8 hours of sunshine per day. September has total rainfall of 8.7cm (3.4inches) making it mostly dry with only light showers. There are just 9.9 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days.

More about September temperature and sunshine.

Can you swim in Maine in September?

No, September is too cold for swimming in Maine for any length of time, with the sea water at 15°C (58°F), unless you have a wetsuit.

More about September sea temperatures.

Is September a good time to holiday in Maine?

Yes, September is a good time for a holiday in Maine.

September has average maximum temperatures of 22°C (71°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 46% making it quite sunny but with regular periods of cloudy and overcast skies. There are 5.8 hours of sunshine per day. September has total rainfall of 8.7cm (3.4inches) making it mostly dry with only light showers. There are just 9.9 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days. Sea temperatures are a cold 15°C (58°F). September is too cold for swimming in Maine for any length of time, unless you have a wetsuit.

More about the September temperatures and sunshine.

Is Maine warm in September?

Yes, Maine is nice and warm and makes sunbathing pleasant on clear days in September.

The average maximum temperature in Maine in September is 22°C (71°F). The average maximum temperature is 26°C (78°) in the previous month and 15°C (60°F) in the next month.

The average temperature in Maine in September is 16°C (61°F). The average temperature is 20°C (68°F) in the previous month and 10°C (51°F) in the next month.

More info about the September temperatures and sunshine.

How sunny is Maine in September?

The average day light hours per day in Maine in September are 12.5. The sunshine percentage is 46% making it quite sunny but with regular periods of cloudy and overcast skies. There are 5.8 hours of sunshine per day.

More about September sunshine.

Temperature in Maine in September

The weather in September is cooler than the previous month and temperatures continue to drop markedly into October. The average maximum temperature in Maine in September is 22°C (71°F). The average maximum temperature is 26°C (78°F) in the previous month and 15°C (60°F) in the next month.

The average temperature in Maine in September is 16°C (61°F). The average temperature is 20°C (68°F) in the previous month and 10°C (51°F) in the next month.

The average minimum temperature in Maine in September is 11°C (51°F). The minimum temperature is 15°C (58°F) in the previous month and 5°C (41°F) in the next month.

Sunshine in Maine in September

The days in September are shorter than the previous month and days continue to get shorter into October. September has less hours of sunshine than the previous month and hours of sunshine continue to drop slightly into October. During September the average day light hours are 12.5 per day in Maine. The sunshine percentage is 46% making it quite sunny but with regular periods of cloudy and overcast skies. There are 5.8 hours of sunshine per day.

The ultraviolet index in Maine in September is typically 5.9 during September. An ultraviolet index reading of 6 to 7 indicates a high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 20 minutes. Protection against skin and eye damage is needed. Tanning will be safest before 10am and after 4pm. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Maine in September

The average sea water temperature in Maine in September is 14.5°C (58.1°F) which is cold for swimming, a full wet suit is required to spend any length of time in the sea. The sea temperature in September is marginally cooler than the previous month and temperatures continue to drop slightly into October.

Rainfall in Maine in September

September weather is slightly drier than the previous month. September has fewer days of rain than the previous month. The average total rainfall in Maine in September is 8.7cm (3.4inches) and on average there are 9.9 rainy days in September making it a quite rainy time to visit the beach.

Humidity in Maine in September

The maximum dew point (an indicator of humidity) in Maine in September is 14°C (58°F) which is comfortable for everyone. The dew point is 18°C (64°F) in the previous month and 9°C (9°F) in the next month.

The average maximum relative humidity in Maine in September is typically 94.2%. The maximum relative humidity is 94.1% in the previous month and 91.5% in the next month.

The average relative humidity in Maine in September is typically 75.1%. The average relative humidity is 74.6% in the previous month and 73.2% in the next month.

Wind Speed in Maine in September

The average maximum wind speed in Maine in September is typically 24KM/H (15MPH). The average maximum wind speed is 25KM/H (15MPH) in the previous month and 26KM/H (16MPH) in the next month.

The average wind speed in Maine in September is typically 9KM/H (5MPH). The average wind speed is 9KM/H (5MPH) in the previous month and 11KM/H (7MPH) in the next month.

The average wind direction in Maine in September is from the West-Southwest.

Monthly Averages

Suggested Beaches in September

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Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.

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Need Inspiration?

Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.