S
M
T
W
T
F
S
30
84°
42°
31
82°
44°
1
67°
47°
2
53°
48°
3
56°
39°
4
64°
33°
5
71°
39°
6
68°
45°
7
75°
36°
8
83°
41°
9
90°
42°
10
85°
52°
11
83°
47°
12
77°
47°
13
67°
36°
14
73°
42°
15
80°
42°
16
76°
44°
17
68°
39°
18
78°
41°
19
81°
42°
20
86°
45°
21
85°
47°
22
82°
44°
23
81°
45°
24
81°
43°
25
67°
44°
26
72°
43°
27
73°
43°
28
78°
49°
29
84°
49°
30
85°
41°
1
82°
41°
2
77°
39°
3
81°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dunsmuir
Dunsmuir's September 2026 forecast shows daily high temperatures ranging from 67° to 85°, with overnight lows between 38° and 49°. The average high for September is 78° with an average low of 43°. 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 Dunsmuir. See also: October | November | December.
