S
M
T
W
T
F
S
26
58°
35°
27
58°
36°
28
53°
41°
29
52°
35°
30
49°
35°
1
41°
34°
2
48°
35°
3
N/A
4
63°
38°
5
48°
31°
6
47°
30°
7
47°
34°
8
50°
34°
9
51°
35°
10
53°
36°
11
52°
34°
12
56°
37°
13
57°
40°
14
59°
39°
15
59°
38°
16
58°
39°
17
59°
43°
18
57°
40°
19
57°
40°
20
58°
43°
21
59°
40°
22
57°
36°
23
57°
37°
24
58°
36°
25
57°
37°
26
58°
37°
27
58°
38°
28
59°
38°
29
60°
41°
30
60°
44°
31
61°
42°
1
62°
43°
2
63°
44°
3
64°
47°
4
63°
44°
5
63°
50°
6
67°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Birch Island
Birch Island's May 2026 forecast shows daily high temperatures ranging from 47° to 67°, with overnight lows between 30° and 51°. The average high for May is 58° with an average low of 39°. 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 Birch Island. See also: June | July | August.