S
M
T
W
T
F
S
29
49°
35°
30
49°
34°
1
50°
35°
2
51°
33°
3
42°
30°
4
38°
17°
5
37°
15°
6
32°
22°
7
40°
30°
8
39°
23°
9
38°
21°
10
37°
19°
11
35°
16°
12
34°
21°
13
37°
29°
14
42°
32°
15
45°
28°
16
46°
24°
17
42°
26°
18
40°
24°
19
39°
19°
20
35°
21°
21
40°
24°
22
42°
26°
23
39°
26°
24
40°
24°
25
38°
21°
26
38°
19°
27
39°
20°
28
40°
21°
29
38°
18°
30
36°
20°
31
35°
23°
1
36°
19°
2
37°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Chillicothe
Chillicothe's December 2026 forecast shows daily high temperatures ranging from 32° to 51°, with overnight lows between 15° and 35°. The average high for December is 40° with an average low of 24°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Chillicothe. See also: January | February | March.
