S
M
T
W
T
F
S
30
69°
47°
31
68°
48°
1
67°
47°
2
68°
46°
3
70°
48°
4
74°
53°
5
72°
52°
6
66°
51°
7
68°
44°
8
66°
49°
9
69°
53°
10
72°
52°
11
69°
44°
12
67°
44°
13
64°
43°
14
62°
42°
15
61°
41°
16
62°
42°
17
63°
43°
18
64°
49°
19
66°
43°
20
71°
41°
21
63°
40°
22
58°
39°
23
69°
49°
24
67°
49°
25
Hist. Avg.
64°
43°
26
Hist. Avg.
63°
42°
27
Hist. Avg.
63°
42°
28
Hist. Avg.
62°
41°
29
Hist. Avg.
62°
41°
30
Hist. Avg.
61°
40°
1
Hist. Avg.
61°
40°
2
Hist. Avg.
60°
40°
3
Hist. Avg.
60°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Clam Lake
Clam Lake's September 2026 forecast shows daily high temperatures ranging from 58° to 74°, with overnight lows between 39° and 53°. The average high for September is 67° with an average low of 46°. 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 Clam Lake. See also: October | November | December.
