S
M
T
W
T
F
S
30
97°
66°
31
97°
73°
1
99°
75°
2
99°
76°
3
100°
75°
4
101°
75°
5
102°
76°
6
103°
75°
7
96°
71°
8
99°
71°
9
97°
76°
10
99°
76°
11
91°
71°
12
93°
71°
13
97°
70°
14
99°
73°
15
99°
74°
16
99°
73°
17
93°
70°
18
91°
64°
19
86°
62°
20
81°
61°
21
85°
62°
22
85°
59°
23
87°
61°
24
84°
60°
25
89°
65°
26
88°
66°
27
88°
64°
28
87°
64°
29
88°
65°
30
85°
64°
1
85°
63°
2
84°
62°
3
86°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Colt
Colt's September 2026 forecast shows daily high temperatures ranging from 81° to 99°, with overnight lows between 59° and 74°. The average high for September is 89° with an average low of 65°. 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 Colt. See also: October | November | December.