S
M
T
W
T
F
S
30
69°
37°
31
78°
35°
1
73°
43°
2
66°
46°
3
57°
41°
4
54°
41°
5
67°
34°
6
57°
39°
7
55°
41°
8
66°
34°
9
73°
36°
10
77°
39°
11
68°
43°
12
74°
38°
13
60°
46°
14
60°
39°
15
65°
31°
16
76°
41°
17
77°
45°
18
63°
42°
19
65°
45°
20
73°
37°
21
74°
38°
22
76°
41°
23
74°
41°
24
80°
40°
25
69°
37°
26
59°
31°
27
63°
39°
28
69°
36°
29
69°
42°
30
71°
40°
1
74°
40°
2
74°
41°
3
74°
39°
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 63° to 74°, with overnight lows between 36° and 42°. The average high for September is 71° 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.
