S
M
T
W
T
F
S
26
60°
38°
27
69°
38°
28
60°
47°
29
54°
48°
30
51°
39°
1
51°
35°
2
47°
30°
3
50°
40°
4
62°
51°
5
70°
51°
6
55°
42°
7
50°
34°
8
48°
35°
9
53°
40°
10
56°
42°
11
56°
44°
12
57°
44°
13
56°
45°
14
58°
46°
15
60°
44°
16
61°
46°
17
61°
44°
18
62°
52°
19
68°
52°
20
67°
51°
21
70°
53°
22
69°
52°
23
63°
52°
24
68°
47°
25
62°
45°
26
63°
49°
27
63°
53°
28
64°
54°
29
70°
54°
30
66°
52°
31
68°
46°
1
64°
46°
2
63°
47°
3
64°
47°
4
64°
48°
5
65°
48°
6
65°
49°
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 47° to 70°, with overnight lows between 30° and 54°. The average high for May is 61° with an average low of 46°. 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.
