S
M
T
W
T
F
S
30
75°
48°
31
82°
50°
1
73°
58°
2
63°
52°
3
65°
50°
4
70°
51°
5
73°
53°
6
74°
53°
7
74°
54°
8
73°
54°
9
76°
56°
10
80°
55°
11
78°
54°
12
76°
54°
13
75°
51°
14
77°
52°
15
72°
54°
16
70°
54°
17
70°
49°
18
71°
48°
19
70°
54°
20
69°
51°
21
69°
46°
22
70°
47°
23
68°
46°
24
67°
46°
25
67°
48°
26
68°
46°
27
72°
54°
28
66°
53°
29
68°
49°
30
69°
51°
1
66°
50°
2
65°
44°
3
65°
46°
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 63° to 80°, with overnight lows between 44° and 58°. The average high for September is 71° 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.
