Get the monthly weather forecast for Maine, ME, including daily high/low, historical averages, to help you plan ahead.

Average temperatures for September at cities, communities, lakes and other locations throughout Maine are listed below in degrees Fahrenheit and Celsius.

In Bar Harbor during September average daily high temperatures decrease from 69°F to 61°F and it is overcast or mostly cloudy about 39% of the time.

The temperature reaches around 20℃ during the daytime in September, falling away to 8℃ at night. The UV index will be moderate at this time of year, so not ...

Foliage season begins in September, making it a perfect time for day trips to a half dozen waterfalls in the Western Mountains of Maine. October. Maine Fall ...

The weather in Bar Harbor in September is mildly cool and breezy, with average highs of 66°F (19°C) and lows of 55°F (13°C).

The average high and low temperatures will dip 10 degrees, a welcome change from the often muggy conditions of summer. Sailing conditions will improve as fog ...

Annual precipitation in Maine averages 40 inches in the Northern Division, about 42 inches in the South and 46 inches in the Coastal Division. Although Maine is ...

September temperatures in Maine present a mild and comfortable climate, ideal for enjoying the early fall scenery.