S
M
T
W
T
F
S
30
80°
58°
31
80°
58°
1
79°
62°
2
79°
62°
3
81°
63°
4
81°
56°
5
82°
55°
6
76°
55°
7
77°
57°
8
79°
55°
9
77°
55°
10
80°
54°
11
78°
53°
12
76°
53°
13
75°
52°
14
75°
53°
15
77°
54°
16
79°
56°
17
80°
57°
18
80°
57°
19
81°
58°
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 75° to 82°, with overnight lows between 52° and 63°. The average high for September is 79° with an average low of 56°. 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.
