S
M
T
W
T
F
S
30
77°
60°
31
78°
57°
1
80°
56°
2
77°
55°
3
76°
58°
4
78°
64°
5
83°
61°
6
82°
54°
7
79°
55°
8
75°
54°
9
78°
61°
10
79°
58°
11
77°
60°
12
74°
60°
13
74°
54°
14
73°
52°
15
71°
51°
16
72°
52°
17
72°
58°
18
76°
58°
19
79°
59°
20
80°
58°
21
76°
51°
22
75°
56°
23
70°
49°
24
76°
48°
25
69°
47°
26
69°
51°
27
75°
55°
28
68°
56°
29
75°
55°
30
Hist. Avg.
70°
50°
1
Hist. Avg.
70°
50°
2
Hist. Avg.
70°
49°
3
Hist. Avg.
69°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Oregon
Oregon's September 2026 forecast shows daily high temperatures ranging from 68° to 83°, with overnight lows between 47° and 64°. The average high for September is 76° with an average low of 56°. 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 Oregon. See also: October | November | December.
