S
M
T
W
T
F
S
30
70°
44°
31
73°
46°
1
76°
43°
2
70°
42°
3
67°
40°
4
71°
42°
5
75°
47°
6
75°
46°
7
73°
40°
8
65°
38°
9
65°
38°
10
67°
39°
11
71°
40°
12
70°
45°
13
69°
46°
14
63°
47°
15
62°
44°
16
62°
44°
17
63°
43°
18
61°
43°
19
60°
37°
20
62°
36°
21
61°
32°
22
59°
34°
23
60°
34°
24
64°
39°
25
67°
41°
26
63°
37°
27
59°
42°
28
56°
33°
29
57°
39°
30
Hist. Avg.
57°
35°
1
Hist. Avg.
56°
35°
2
Hist. Avg.
55°
34°
3
Hist. Avg.
55°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Loon Lake
Loon Lake's September 2026 forecast shows daily high temperatures ranging from 56° to 76°, with overnight lows between 32° and 47°. The average high for September is 66° with an average low of 41°. 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.
