Average May Temperatures for Maine

Average temperatures for May 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 May temperatures
High °F	Low °F	Place	High °C	Low °C
65	45	Acadia National Park	18	7
63	41	Belfast	17	5
64	44	Brunswick	18	7
60	43	Eastport	16	6
61	42	Jonesboro	16	6
62	43	Kennebunkport	16	6
65	45	Newcastle	18	7
64	46	Portland	18	8
61	43	Tenants Harbor	16	6

Central Maine

Average daily temperatures in May
High °F	Low °F	Place	High °C	Low °C
66	45	Augusta	19	7
66	43	Bangor	19	6
65	40	Dover-Foxcroft	19	4
62	40	Flagstaff Lake, Long Falls Dam	17	4
64	42	Grand Lake Stream	18	6
65	46	Lewiston	19	8
62	39	Lower Richardson Lake, Middle Dam	16	4
63	37	Rangeley	17	3
67	43	Rumford	19	6
66	43	Waterville	19	6

Northern Maine

May temperatures: daily averages
High °F	Low °F	Place	High °C	Low °C
61	37	Fort Kent	16	3
64	41	Millinocket	18	5
62	38	Moosehead Lake, Brassua Dam	16	3
65	41	Presque Isle	18	5

Average Temperatures for Maine in May

Maine Coast

Central Maine

Northern Maine

Reference

More Maine Weather Information