S
M
T
W
T
F
S
30
84°
62°
31
84°
62°
1
85°
61°
2
84°
62°
3
85°
62°
4
84°
61°
5
84°
60°
6
83°
62°
7
85°
61°
8
82°
59°
9
81°
59°
10
82°
58°
11
83°
59°
12
81°
58°
13
80°
56°
14
68°
46°
15
69°
55°
16
69°
52°
17
71°
51°
18
70°
48°
19
76°
51°
20
78°
54°
21
76°
54°
22
72°
51°
23
78°
44°
24
71°
51°
25
70°
52°
26
69°
48°
27
75°
39°
28
69°
40°
29
68°
48°
30
67°
49°
1
68°
50°
2
71°
53°
3
74°
52°
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 67° to 85°, with overnight lows between 39° and 62°. The average high for September is 76° with an average low of 54°. 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.
