S
M
T
W
T
F
S
26
34°
30°
27
35°
24°
28
41°
22°
29
46°
28°
30
46°
28°
1
47°
34°
2
45°
38°
3
58°
38°
4
47°
38°
5
59°
38°
6
68°
46°
7
64°
44°
8
56°
45°
9
54°
33°
10
60°
34°
11
44°
31°
12
52°
36°
13
48°
37°
14
61°
37°
15
48°
38°
16
60°
39°
17
71°
43°
18
47°
37°
19
53°
34°
20
50°
38°
21
61°
37°
22
54°
35°
23
53°
35°
24
61°
36°
25
58°
38°
26
58°
37°
27
57°
38°
28
59°
38°
29
61°
40°
30
59°
41°
31
59°
40°
1
58°
39°
2
59°
40°
3
58°
39°
4
58°
39°
5
59°
38°
6
59°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Harbour Main
Harbour Main's May 2026 forecast shows daily high temperatures ranging from 50° to 61°, with overnight lows between 34° and 41°. The average high for May is 58° with an average low of 38°. 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 Harbour Main. See also: June | July | August.
