S
M
T
W
T
F
S
30
91°
61°
31
90°
61°
1
86°
65°
2
90°
65°
3
91°
64°
4
91°
66°
5
90°
65°
6
90°
58°
7
82°
58°
8
82°
59°
9
83°
64°
10
88°
62°
11
88°
63°
12
87°
62°
13
80°
58°
14
82°
63°
15
87°
60°
16
87°
55°
17
80°
55°
18
79°
54°
19
78°
55°
20
78°
54°
21
77°
53°
22
76°
53°
23
77°
58°
24
77°
57°
25
78°
58°
26
83°
58°
27
83°
57°
28
82°
59°
29
82°
58°
30
77°
56°
1
75°
55°
2
77°
50°
3
73°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chapmansboro
Chapmansboro's September 2026 forecast shows daily high temperatures ranging from 73° to 91°, with overnight lows between 48° and 66°. 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 Chapmansboro. See also: October | November | December.