S
M
T
W
T
F
S
30
75°
51°
31
86°
49°
1
71°
58°
2
65°
57°
3
64°
53°
4
70°
53°
5
73°
51°
6
65°
56°
7
74°
54°
8
83°
51°
9
86°
56°
10
76°
50°
11
71°
53°
12
63°
53°
13
70°
51°
14
75°
51°
15
82°
57°
16
78°
56°
17
81°
57°
18
79°
55°
19
81°
56°
20
78°
56°
21
64°
50°
22
69°
50°
23
69°
50°
24
73°
49°
25
74°
55°
26
68°
53°
27
67°
50°
28
67°
47°
29
66°
45°
30
67°
46°
1
74°
52°
2
75°
52°
3
75°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Washougal
Washougal's September 2026 forecast shows daily high temperatures ranging from 63° to 86°, with overnight lows between 45° and 57°. The average high for September is 74° with an average low of 52°. 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 Washougal. See also: October | November | December.
