Average September Temperatures for Maine

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

You can jump to a separate table for Maine's Coast, Central Maine and Northern Maine.

The tables give the normals for maximum and minimum monthly temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Maine Coast

Average September temperatures
High °F	Low °F	Place	High °C	Low °C
71	53	Acadia National Park	22	12
70	48	Belfast	21	9
70	50	Brunswick	21	10
67	51	Eastport	20	10
69	49	Jonesboro	21	9
69	49	Kennebunkport	21	9
69	52	Newcastle	21	11
71	52	Portland	22	11
68	52	Tenants Harbor	20	11

Central Maine

Average daily temperatures in September
High °F	Low °F	Place	High °C	Low °C
71	51	Augusta	22	11
71	49	Bangor	22	9
71	45	Dover-Foxcroft	22	7
68	46	Flagstaff Lake, Long Falls Dam	20	8
70	49	Grand Lake Stream	21	9
70	52	Lewiston	21	11
68	45	Lower Richardson Lake, Middle Dam	20	7
68	44	Rangeley	20	7
71	48	Rumford	22	9
72	50	Waterville	22	10

Northern Maine

September temperatures: daily averages
High °F	Low °F	Place	High °C	Low °C
66	43	Fort Kent	19	6
70	48	Millinocket	21	9
67	45	Moosehead Lake, Brassua Dam	20	7
69	47	Presque Isle	21	8

Average Temperatures for Maine in September

Maine Coast

Central Maine

Northern Maine

Reference

More Maine Weather Information