S
M
T
W
T
F
S
30
87°
59°
31
85°
60°
1
85°
57°
2
84°
58°
3
85°
55°
4
85°
52°
5
83°
50°
6
74°
49°
7
74°
50°
8
73°
58°
9
72°
52°
10
73°
54°
11
74°
47°
12
72°
53°
13
73°
57°
14
73°
54°
15
71°
51°
16
70°
49°
17
71°
51°
18
73°
53°
19
79°
51°
20
79°
50°
21
78°
47°
22
69°
44°
23
68°
48°
24
69°
49°
25
68°
45°
26
67°
46°
27
68°
48°
28
68°
49°
29
66°
46°
30
65°
45°
1
66°
50°
2
69°
53°
3
73°
50°
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 65° to 87°, with overnight lows between 44° and 60°. The average high for September is 74° with an average low of 51°. 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.
