S
M
T
W
T
F
S
30
69°
46°
31
63°
46°
1
67°
48°
2
69°
48°
3
69°
45°
4
64°
36°
5
57°
37°
6
58°
37°
7
57°
35°
8
56°
33°
9
55°
35°
10
54°
39°
11
55°
41°
12
56°
40°
13
58°
43°
14
63°
45°
15
59°
40°
16
63°
36°
17
58°
31°
18
53°
41°
19
53°
42°
20
62°
42°
21
56°
39°
22
52°
32°
23
52°
35°
24
53°
32°
25
50°
31°
26
52°
32°
27
51°
38°
28
50°
39°
29
51°
29°
30
50°
39°
1
49°
37°
2
53°
37°
3
53°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Loon Lake
Loon Lake's September 2026 forecast shows daily high temperatures ranging from 49° to 69°, with overnight lows between 29° and 48°. The average high for September is 57° with an average low of 38°. 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 Loon Lake. See also: October | November | December.
