S
M
T
W
T
F
S
30
85°
66°
31
87°
65°
1
86°
62°
2
83°
64°
3
81°
58°
4
79°
57°
5
77°
56°
6
78°
61°
7
83°
56°
8
82°
55°
9
79°
62°
10
78°
61°
11
83°
61°
12
82°
60°
13
83°
60°
14
82°
59°
15
84°
61°
16
74°
55°
17
73°
52°
18
73°
51°
19
Hist. Avg.
76°
53°
20
Hist. Avg.
76°
52°
21
Hist. Avg.
75°
52°
22
Hist. Avg.
75°
52°
23
Hist. Avg.
75°
51°
24
Hist. Avg.
74°
51°
25
Hist. Avg.
74°
50°
26
Hist. Avg.
74°
50°
27
Hist. Avg.
73°
50°
28
Hist. Avg.
73°
49°
29
Hist. Avg.
72°
49°
30
Hist. Avg.
72°
48°
1
Hist. Avg.
72°
48°
2
Hist. Avg.
71°
48°
3
Hist. Avg.
71°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Chillicothe
Chillicothe's September 2026 forecast shows daily high temperatures ranging from 73° to 87°, with overnight lows between 51° and 66°. The average high for September is 81° with an average low of 59°. 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.
