S
M
T
W
T
F
S
30
78°
55°
31
77°
46°
1
70°
45°
2
70°
51°
3
69°
54°
4
76°
47°
5
77°
43°
6
69°
44°
7
69°
44°
8
70°
52°
9
69°
50°
10
68°
47°
11
66°
47°
12
67°
43°
13
66°
41°
14
64°
42°
15
65°
46°
16
65°
50°
17
66°
50°
18
71°
49°
19
71°
46°
20
70°
47°
21
68°
42°
22
63°
40°
23
62°
38°
24
61°
39°
25
62°
40°
26
62°
38°
27
68°
46°
28
70°
45°
29
Hist. Avg.
62°
37°
30
Hist. Avg.
62°
37°
1
Hist. Avg.
62°
37°
2
Hist. Avg.
61°
36°
3
Hist. Avg.
61°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Stone Lake
Stone Lake's September 2026 forecast shows daily high temperatures ranging from 61° to 78°, with overnight lows between 38° and 55°. The average high for September is 68° 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 Stone Lake. See also: October | November | December.