S
M
T
W
T
F
S
29
38°
27°
30
47°
23°
1
47°
21°
2
42°
28°
3
45°
20°
4
46°
19°
5
33°
17°
6
32°
17°
7
31°
18°
8
32°
22°
9
34°
29°
10
42°
26°
11
43°
24°
12
35°
23°
13
32°
22°
14
32°
19°
15
33°
14°
16
29°
12°
17
27°
14°
18
26°
25°
19
33°
25°
20
34°
18°
21
39°
18°
22
28°
27°
23
40°
29°
24
40°
24°
25
39°
23°
26
38°
22°
27
35°
23°
28
37°
25°
29
37°
25°
30
38°
26°
31
40°
24°
1
41°
22°
2
39°
21°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Pittsfield
Pittsfield's December 2026 forecast shows daily high temperatures ranging from 26° to 47°, with overnight lows between 12° and 29°. The average high for December is 37° with an average low of 22°. 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 Pittsfield. See also: January | February | March.