S
M
T
W
T
F
S
26
60°
44°
27
59°
43°
28
63°
45°
29
63°
47°
30
64°
48°
1
58°
48°
2
57°
47°
3
58°
48°
4
61°
46°
5
65°
48°
6
60°
48°
7
59°
49°
8
58°
47°
9
62°
48°
10
58°
47°
11
58°
47°
12
59°
45°
13
62°
48°
14
60°
50°
15
59°
48°
16
59°
47°
17
60°
46°
18
60°
47°
19
62°
48°
20
67°
52°
21
69°
52°
22
68°
51°
23
61°
48°
24
60°
46°
25
60°
45°
26
64°
53°
27
69°
48°
28
70°
53°
29
71°
56°
30
72°
54°
31
70°
46°
1
69°
45°
2
70°
50°
3
71°
55°
4
72°
49°
5
71°
49°
6
72°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Bellingham
South Bellingham's May 2026 forecast shows daily high temperatures ranging from 57° to 72°, with overnight lows between 43° and 56°. The average high for May is 64° with an average low of 48°. 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 South Bellingham. See also: June | July | August.
