S
M
T
W
T
F
S
30
79°
64°
31
90°
66°
1
86°
59°
2
88°
68°
3
86°
68°
4
88°
72°
5
86°
70°
6
86°
70°
7
86°
68°
8
82°
68°
9
82°
61°
10
81°
52°
11
86°
63°
12
77°
55°
13
72°
46°
14
68°
45°
15
73°
50°
16
77°
46°
17
72°
57°
18
66°
59°
19
62°
50°
20
65°
44°
21
62°
40°
22
66°
43°
23
67°
48°
24
67°
53°
25
69°
52°
26
69°
55°
27
68°
51°
28
68°
51°
29
66°
48°
30
67°
49°
1
70°
50°
2
63°
42°
3
61°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Shell Lake
Shell Lake's September 2026 forecast shows daily high temperatures ranging from 61° to 70°, with overnight lows between 40° and 55°. The average high for September is 66° 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 September weather will actually feel in Shell Lake. See also: October | November | December.
