S
M
T
W
T
F
S
29
38°
28°
30
37°
26°
1
36°
27°
2
37°
32°
3
39°
33°
4
42°
33°
5
42°
36°
6
43°
34°
7
40°
34°
8
37°
33°
9
36°
31°
10
34°
31°
11
45°
30°
12
42°
30°
13
44°
25°
14
40°
21°
15
35°
24°
16
32°
25°
17
32°
26°
18
36°
30°
19
38°
32°
20
42°
33°
21
43°
32°
22
44°
32°
23
43°
34°
24
46°
29°
25
45°
23°
26
43°
21°
27
30°
21°
28
32°
29°
29
40°
29°
30
41°
32°
31
43°
33°
1
44°
29°
2
44°
23°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Chatham
Chatham's December 2026 forecast shows daily high temperatures ranging from 30° to 46°, with overnight lows between 21° and 36°. The average high for December is 40° with an average low of 29°. 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 Chatham. See also: January | February | March.
