S
M
T
W
T
F
S
30
82°
51°
31
76°
50°
1
74°
48°
2
75°
52°
3
76°
51°
4
82°
49°
5
80°
57°
6
78°
54°
7
72°
47°
8
72°
46°
9
73°
47°
10
72°
48°
11
72°
52°
12
77°
52°
13
81°
49°
14
81°
51°
15
80°
55°
16
76°
55°
17
72°
50°
18
71°
54°
19
74°
55°
20
79°
56°
21
80°
55°
22
79°
54°
23
70°
55°
24
73°
45°
25
69°
46°
26
68°
53°
27
69°
46°
28
68°
45°
29
67°
49°
30
69°
52°
1
74°
53°
2
76°
50°
3
75°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wilsonville
Wilsonville's September 2026 forecast shows daily high temperatures ranging from 67° to 82°, with overnight lows between 45° and 57°. The average high for September is 75° 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 Wilsonville. See also: October | November | December.
