S
M
T
W
T
F
S
29
43°
31°
30
46°
34°
1
47°
33°
2
45°
33°
3
47°
31°
4
45°
30°
5
45°
30°
6
42°
31°
7
45°
30°
8
39°
28°
9
36°
28°
10
37°
26°
11
36°
28°
12
37°
26°
13
37°
21°
14
38°
17°
15
33°
18°
16
31°
21°
17
32°
19°
18
31°
26°
19
36°
25°
20
40°
22°
21
35°
19°
22
32°
19°
23
31°
14°
24
33°
21°
25
32°
16°
26
36°
11°
27
29°
11°
28
25°
12°
29
29°
10°
30
27°
14°
31
28°
23°
1
41°
18°
2
39°
12°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Peterborough
Peterborough's December 2026 forecast shows daily high temperatures ranging from 25° to 47°, with overnight lows between 10° and 34°. The average high for December is 37° with an average low of 23°. 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 Peterborough. See also: January | February | March.
