S
M
T
W
T
F
S
30
72°
56°
31
75°
57°
1
72°
57°
2
73°
54°
3
68°
51°
4
68°
51°
5
70°
54°
6
73°
56°
7
75°
54°
8
71°
50°
9
65°
48°
10
67°
51°
11
64°
40°
12
62°
47°
13
62°
46°
14
64°
45°
15
63°
42°
16
64°
43°
17
62°
43°
18
61°
44°
19
61°
39°
20
59°
39°
21
61°
41°
22
65°
50°
23
68°
45°
24
70°
51°
25
71°
50°
26
72°
50°
27
71°
41°
28
70°
47°
29
62°
42°
30
58°
47°
1
58°
49°
2
67°
36°
3
69°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Beaverton
Beaverton's September 2026 forecast shows daily high temperatures ranging from 58° to 75°, with overnight lows between 34° and 57°. The average high for September is 67° with an average low of 47°. 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 Beaverton. See also: October | November | December.
