S
M
T
W
T
F
S
30
102°
76°
31
N/A
1
100°
75°
2
90°
74°
3
89°
75°
4
98°
72°
5
96°
73°
6
100°
73°
7
101°
72°
8
100°
75°
9
96°
71°
10
97°
72°
11
89°
67°
12
90°
69°
13
92°
70°
14
93°
70°
15
93°
70°
16
92°
69°
17
92°
70°
18
91°
70°
19
92°
69°
20
91°
70°
21
91°
69°
22
86°
68°
23
88°
68°
24
90°
67°
25
90°
67°
26
89°
66°
27
90°
67°
28
90°
66°
29
89°
65°
30
89°
66°
1
88°
66°
2
88°
65°
3
87°
65°
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 86° to 101°, with overnight lows between 65° and 75°. The average high for September is 92° with an average low of 69°. 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.
