S
M
T
W
T
F
S
26
65°
37°
27
64°
38°
28
68°
38°
29
60°
41°
30
55°
40°
1
48°
36°
2
50°
35°
3
49°
36°
4
52°
36°
5
56°
37°
6
54°
36°
7
56°
37°
8
55°
36°
9
54°
38°
10
59°
39°
11
59°
34°
12
62°
36°
13
63°
40°
14
59°
35°
15
56°
35°
16
56°
36°
17
58°
36°
18
56°
37°
19
60°
44°
20
62°
39°
21
58°
37°
22
58°
38°
23
60°
39°
24
59°
38°
25
61°
40°
26
60°
39°
27
60°
39°
28
62°
48°
29
70°
49°
30
72°
48°
31
66°
46°
1
65°
43°
2
65°
44°
3
66°
43°
4
64°
45°
5
69°
44°
6
64°
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 48° to 72°, with overnight lows between 34° and 49°. The average high for May is 60° 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.
