S
M
T
W
T
F
S
26
56°
37°
27
52°
37°
28
51°
36°
29
44°
39°
30
46°
40°
1
52°
41°
2
52°
38°
3
44°
39°
4
53°
39°
5
53°
40°
6
52°
43°
7
53°
42°
8
52°
40°
9
57°
38°
10
49°
43°
11
56°
43°
12
56°
42°
13
57°
37°
14
59°
45°
15
54°
43°
16
55°
44°
17
58°
44°
18
53°
44°
19
57°
51°
20
59°
47°
21
57°
44°
22
52°
45°
23
50°
46°
24
51°
46°
25
53°
47°
26
52°
48°
27
53°
44°
28
54°
46°
29
56°
48°
30
54°
48°
31
52°
49°
1
54°
49°
2
55°
48°
3
55°
48°
4
54°
46°
5
54°
49°
6
55°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grand Manan
Grand Manan's May 2026 forecast shows daily high temperatures ranging from 50° to 59°, with overnight lows between 43° and 51°. The average high for May is 54° with an average low of 47°. 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 Grand Manan. See also: June | July | August.
