S
M
T
W
T
F
S
30
75°
59°
31
76°
60°
1
81°
60°
2
81°
53°
3
80°
51°
4
73°
57°
5
73°
59°
6
80°
52°
7
74°
49°
8
70°
49°
9
72°
55°
10
71°
57°
11
72°
56°
12
79°
56°
13
78°
50°
14
72°
48°
15
68°
47°
16
67°
50°
17
68°
47°
18
67°
45°
19
68°
42°
20
66°
43°
21
65°
50°
22
67°
48°
23
73°
44°
24
70°
51°
25
72°
52°
26
69°
52°
27
73°
50°
28
73°
44°
29
71°
46°
30
62°
48°
1
67°
47°
2
71°
49°
3
61°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cascade Mountain
Cascade Mountain's September 2026 forecast shows daily high temperatures ranging from 61° to 81°, with overnight lows between 39° and 60°. The average high for September is 72° with an average low of 50°. 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 Cascade Mountain. See also: October | November | December.
