S
M
T
W
T
F
S
30
73°
48°
31
75°
49°
1
77°
49°
2
71°
47°
3
70°
46°
4
74°
46°
5
77°
47°
6
80°
48°
7
80°
48°
8
79°
47°
9
79°
48°
10
76°
47°
11
71°
44°
12
69°
45°
13
66°
38°
14
65°
35°
15
65°
35°
16
68°
42°
17
76°
46°
18
65°
43°
19
63°
36°
20
64°
39°
21
66°
34°
22
64°
33°
23
64°
35°
24
65°
34°
25
68°
36°
26
67°
37°
27
64°
29°
28
60°
26°
29
57°
26°
30
57°
30°
1
59°
32°
2
63°
34°
3
66°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cascade
Cascade's September 2026 forecast shows daily high temperatures ranging from 57° to 80°, with overnight lows between 26° and 49°. The average high for September is 69° with an average low of 40°. 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. See also: October | November | December.
