S
M
T
W
T
F
S
30
99°
75°
31
100°
75°
1
98°
76°
2
99°
76°
3
99°
77°
4
96°
74°
5
97°
75°
6
97°
75°
7
90°
70°
8
92°
72°
9
94°
73°
10
94°
73°
11
93°
72°
12
94°
72°
13
95°
73°
14
94°
73°
15
93°
72°
16
93°
72°
17
92°
71°
18
92°
71°
19
91°
70°
20
92°
71°
21
93°
71°
22
92°
70°
23
92°
70°
24
91°
69°
25
92°
69°
26
91°
68°
27
90°
68°
28
90°
67°
29
89°
68°
30
90°
67°
1
90°
67°
2
89°
66°
3
90°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Coolidge
Coolidge's September 2026 forecast shows daily high temperatures ranging from 89° to 100°, with overnight lows between 65° and 77°. The average high for September is 93° with an average low of 71°. 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 Coolidge. See also: October | November | December.