S
M
T
W
T
F
S
30
90°
71°
31
93°
70°
1
96°
72°
2
96°
72°
3
97°
73°
4
97°
73°
5
96°
72°
6
98°
74°
7
94°
72°
8
92°
70°
9
94°
70°
10
93°
72°
11
89°
72°
12
86°
70°
13
88°
71°
14
91°
70°
15
91°
69°
16
90°
70°
17
89°
68°
18
89°
64°
19
87°
62°
20
83°
63°
21
85°
61°
22
85°
60°
23
88°
65°
24
88°
65°
25
87°
64°
26
86°
63°
27
86°
62°
28
87°
63°
29
86°
63°
30
87°
62°
1
86°
62°
2
86°
61°
3
85°
62°
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 83° to 94°, with overnight lows between 60° and 72°. The average high for September is 88° with an average low of 65°. 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.
