S
M
T
W
T
F
S
30
73°
47°
31
74°
51°
1
71°
52°
2
71°
46°
3
72°
46°
4
76°
49°
5
71°
47°
6
70°
45°
7
71°
46°
8
77°
46°
9
80°
50°
10
80°
54°
11
79°
53°
12
80°
54°
13
80°
54°
14
76°
44°
15
74°
46°
16
73°
52°
17
79°
53°
18
80°
49°
19
79°
50°
20
77°
51°
21
72°
52°
22
77°
52°
23
78°
50°
24
76°
51°
25
75°
54°
26
76°
53°
27
77°
51°
28
67°
48°
29
65°
49°
30
66°
49°
1
65°
47°
2
62°
43°
3
61°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cascade Locks
Cascade Locks's September 2026 forecast shows daily high temperatures ranging from 61° to 80°, with overnight lows between 43° and 54°. The average high for September is 74° with an average low of 49°. 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 Locks. See also: October | November | December.
