S
M
T
W
T
F
S
30
96°
75°
31
97°
74°
1
97°
71°
2
96°
72°
3
96°
72°
4
95°
69°
5
98°
70°
6
94°
68°
7
92°
67°
8
88°
66°
9
89°
67°
10
86°
65°
11
83°
57°
12
82°
57°
13
83°
61°
14
79°
56°
15
84°
62°
16
84°
61°
17
83°
62°
18
84°
62°
19
84°
63°
20
83°
62°
21
83°
62°
22
82°
61°
23
83°
61°
24
82°
60°
25
82°
59°
26
81°
58°
27
82°
59°
28
81°
58°
29
80°
57°
30
81°
58°
1
81°
57°
2
80°
57°
3
80°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chillicothe
Chillicothe's September 2026 forecast shows daily high temperatures ranging from 79° to 98°, with overnight lows between 56° and 72°. The average high for September is 85° with an average low of 62°. 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 Chillicothe. See also: October | November | December.
