S
M
T
W
T
F
S
26
70°
54°
27
71°
50°
28
63°
51°
29
79°
56°
30
75°
53°
1
66°
50°
2
61°
39°
3
67°
33°
4
79°
38°
5
82°
59°
6
74°
62°
7
66°
44°
8
68°
47°
9
77°
53°
10
78°
54°
11
70°
40°
12
66°
43°
13
72°
51°
14
79°
57°
15
80°
57°
16
81°
60°
17
81°
59°
18
77°
53°
19
79°
57°
20
81°
58°
21
79°
57°
22
76°
50°
23
72°
50°
24
72°
51°
25
74°
54°
26
77°
52°
27
73°
51°
28
74°
52°
29
75°
54°
30
77°
56°
31
76°
59°
1
80°
61°
2
78°
60°
3
77°
60°
4
78°
59°
5
82°
61°
6
82°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Maine
Maine's May 2026 forecast shows daily high temperatures ranging from 66° to 82°, with overnight lows between 40° and 62°. The average high for May is 76° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Maine. See also: June | July | August.
