S
M
T
W
T
F
S
30
80°
50°
31
74°
48°
1
73°
48°
2
72°
49°
3
72°
48°
4
73°
48°
5
71°
49°
6
71°
48°
7
72°
49°
8
71°
53°
9
70°
48°
10
70°
47°
11
69°
47°
12
69°
46°
13
70°
49°
14
69°
48°
15
68°
51°
16
68°
44°
17
69°
45°
18
68°
45°
19
68°
51°
20
67°
50°
21
66°
44°
22
Hist. Avg.
70°
46°
23
Hist. Avg.
69°
46°
24
Hist. Avg.
69°
45°
25
Hist. Avg.
68°
45°
26
Hist. Avg.
68°
45°
27
Hist. Avg.
67°
44°
28
Hist. Avg.
67°
44°
29
Hist. Avg.
67°
44°
30
Hist. Avg.
66°
43°
1
Hist. Avg.
66°
43°
2
Hist. Avg.
65°
42°
3
Hist. Avg.
65°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Beaverton
Beaverton's September 2026 forecast shows daily high temperatures ranging from 66° to 80°, with overnight lows between 44° and 53°. The average high for September is 70° with an average low of 48°. 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.
