S
M
T
W
T
F
S
26
30°
22°
27
36°
26°
28
45°
16°
29
51°
30°
30
64°
26°
1
76°
36°
2
67°
34°
3
61°
36°
4
40°
30°
5
44°
23°
6
52°
18°
7
61°
29°
8
57°
27°
9
55°
26°
10
70°
26°
11
70°
43°
12
74°
40°
13
83°
38°
14
63°
40°
15
40°
31°
16
37°
31°
17
49°
31°
18
54°
31°
19
63°
36°
20
67°
38°
21
67°
36°
22
69°
36°
23
76°
50°
24
71°
40°
25
77°
35°
26
84°
50°
27
86°
55°
28
92°
57°
29
89°
62°
30
81°
58°
31
75°
60°
1
77°
54°
2
68°
48°
3
62°
49°
4
69°
50°
5
70°
53°
6
76°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Shell Lake
Shell Lake's May 2026 forecast shows daily high temperatures ranging from 62° to 89°, with overnight lows between 48° and 62°. The average high for May is 74° 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 Shell Lake. See also: June | July | August.