S
M
T
W
T
F
S
30
81°
55°
31
83°
57°
1
85°
56°
2
81°
55°
3
80°
61°
4
85°
60°
5
86°
61°
6
85°
60°
7
81°
54°
8
78°
53°
9
81°
60°
10
81°
59°
11
80°
60°
12
82°
59°
13
83°
55°
14
76°
50°
15
75°
50°
16
75°
51°
17
76°
52°
18
79°
56°
19
82°
56°
20
81°
57°
21
74°
53°
22
78°
55°
23
76°
55°
24
80°
48°
25
73°
47°
26
72°
53°
27
79°
53°
28
78°
54°
29
Hist. Avg.
74°
49°
30
Hist. Avg.
73°
49°
1
Hist. Avg.
73°
48°
2
Hist. Avg.
72°
48°
3
Hist. Avg.
72°
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 72° to 86°, with overnight lows between 47° and 61°. The average high for September is 80° with an average low of 55°. 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.
