S
M
T
W
T
F
S
30
72°
64°
31
69°
65°
1
75°
67°
2
73°
66°
3
74°
64°
4
73°
61°
5
74°
58°
6
72°
56°
7
73°
55°
8
78°
56°
9
73°
65°
10
69°
61°
11
72°
49°
12
76°
55°
13
71°
54°
14
63°
51°
15
68°
51°
16
69°
56°
17
69°
51°
18
64°
48°
19
63°
49°
20
69°
44°
21
59°
42°
22
62°
45°
23
65°
46°
24
65°
46°
25
67°
49°
26
69°
53°
27
69°
51°
28
63°
54°
29
67°
53°
30
64°
52°
1
63°
53°
2
67°
50°
3
59°
47°
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 59° to 69°, with overnight lows between 42° and 54°. The average high for September is 65° with an average low of 49°. 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.
