S
M
T
W
T
F
S
26
57°
35°
27
59°
36°
28
62°
37°
29
59°
38°
30
54°
38°
1
51°
37°
2
52°
35°
3
55°
37°
4
54°
36°
5
52°
32°
6
54°
33°
7
58°
35°
8
53°
34°
9
56°
33°
10
62°
35°
11
63°
34°
12
62°
39°
13
64°
44°
14
58°
43°
15
61°
41°
16
58°
38°
17
63°
40°
18
68°
46°
19
67°
47°
20
68°
43°
21
60°
40°
22
59°
44°
23
65°
45°
24
63°
46°
25
61°
39°
26
61°
39°
27
62°
40°
28
60°
42°
29
62°
41°
30
63°
40°
31
65°
48°
1
66°
40°
2
68°
44°
3
66°
47°
4
71°
44°
5
72°
51°
6
75°
47°
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 51° to 75°, with overnight lows between 32° and 51°. The average high for May is 61° with an average low of 40°. 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.
