S
M
T
W
T
F
S
30
72°
43°
31
82°
41°
1
84°
53°
2
72°
50°
3
54°
43°
4
63°
43°
5
72°
41°
6
68°
41°
7
64°
46°
8
70°
41°
9
79°
41°
10
84°
46°
11
70°
46°
12
75°
45°
13
54°
45°
14
61°
41°
15
63°
37°
16
72°
43°
17
68°
46°
18
73°
49°
19
75°
46°
20
77°
48°
21
78°
48°
22
73°
42°
23
72°
43°
24
75°
44°
25
73°
42°
26
67°
42°
27
65°
43°
28
67°
40°
29
66°
41°
30
65°
38°
1
57°
33°
2
68°
43°
3
61°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cottonwood
Cottonwood's September 2026 forecast shows daily high temperatures ranging from 57° to 78°, with overnight lows between 33° and 49°. The average high for September is 69° 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 Cottonwood. See also: October | November | December.
