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

Maine Weather in September, USA ; High Temperature. 20°C · 68°F ; Low Temperature. 8°C · 46°F ; Rainfall. 34 mm ; Chance of Rain. 43 % ; Chance of Snow Day. 0 %.

September weather in Portland Maine, United States. Daily high temperatures decrease by 10°F, from 73°F to 63°F, rarely falling below 55°F or exceeding 82°F.

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 ...

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

The high seasonal norm is 70°F. In the morning the temperature drops to 56°F. Thus, the mean temperature average in september in Maine is 63°F. Note that these ...

In the Southern Interior Division during a very warm summer, temperatures may reach 90° for as many as 25 days, and in the Coastal Division, two to seven days.

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 ...

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