S
M
T
W
T
F
S
30
86°
68°
31
91°
70°
1
94°
72°
2
96°
72°
3
97°
72°
4
95°
73°
5
98°
69°
6
91°
70°
7
88°
65°
8
89°
64°
9
90°
69°
10
92°
72°
11
96°
71°
12
87°
71°
13
91°
68°
14
94°
72°
15
86°
65°
16
88°
61°
17
91°
68°
18
94°
69°
19
89°
70°
20
89°
67°
21
91°
68°
22
88°
66°
23
66°
60°
24
61°
53°
25
73°
49°
26
80°
53°
27
82°
56°
28
84°
55°
29
86°
60°
30
86°
61°
1
86°
65°
2
85°
64°
3
84°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chapin
Chapin's September 2026 forecast shows daily high temperatures ranging from 73° to 86°, with overnight lows between 49° and 65°. The average high for September is 83° with an average low of 58°. 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 Chapin. See also: October | November | December.
