S
M
T
W
T
F
S
30
63°
50°
31
77°
51°
1
81°
53°
2
67°
51°
3
64°
49°
4
63°
48°
5
64°
47°
6
74°
47°
7
74°
50°
8
74°
49°
9
72°
48°
10
70°
47°
11
74°
49°
12
72°
47°
13
70°
46°
14
69°
40°
15
71°
43°
16
69°
39°
17
59°
37°
18
59°
36°
19
60°
38°
20
58°
34°
21
57°
33°
22
57°
33°
23
58°
32°
24
55°
31°
25
56°
31°
26
61°
32°
27
65°
40°
28
65°
40°
29
55°
38°
30
56°
30°
1
63°
38°
2
62°
36°
3
62°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Monte Lake
Monte Lake's September 2026 forecast shows daily high temperatures ranging from 55° to 81°, with overnight lows between 30° and 53°. The average high for September is 65° 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 Monte Lake. See also: October | November | December.
