S
M
T
W
T
F
S
26
62°
41°
27
69°
41°
28
65°
40°
29
62°
43°
30
54°
44°
1
63°
43°
2
54°
46°
3
54°
38°
4
70°
40°
5
80°
49°
6
71°
55°
7
63°
47°
8
62°
37°
9
61°
37°
10
72°
51°
11
61°
43°
12
64°
41°
13
67°
46°
14
61°
45°
15
60°
43°
16
77°
43°
17
88°
57°
18
83°
57°
19
92°
66°
20
89°
67°
21
68°
49°
22
65°
45°
23
67°
47°
24
56°
53°
25
70°
54°
26
80°
60°
27
84°
56°
28
69°
49°
29
70°
47°
30
71°
56°
31
73°
54°
1
76°
56°
2
74°
56°
3
73°
57°
4
75°
54°
5
78°
58°
6
78°
57°
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 56° to 84°, with overnight lows between 45° and 60°. The average high for May is 72° with an average low of 54°. 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.
