S
M
T
W
T
F
S
30
74°
47°
31
76°
54°
1
79°
56°
2
84°
54°
3
86°
55°
4
80°
47°
5
74°
47°
6
75°
52°
7
75°
47°
8
73°
47°
9
74°
51°
10
72°
52°
11
73°
51°
12
72°
48°
13
72°
50°
14
73°
52°
15
80°
52°
16
81°
45°
17
76°
45°
18
75°
44°
19
79°
46°
20
79°
52°
21
78°
48°
22
71°
45°
23
70°
46°
24
70°
43°
25
68°
43°
26
71°
42°
27
69°
50°
28
68°
49°
29
67°
46°
30
68°
48°
1
74°
50°
2
72°
48°
3
73°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chehalem Mountains
Chehalem Mountains's September 2026 forecast shows daily high temperatures ranging from 67° to 86°, with overnight lows between 42° and 56°. The average high for September is 74° 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 Chehalem Mountains. See also: October | November | December.
