S
M
T
W
T
F
S
29
38°
29°
30
41°
29°
1
42°
27°
2
34°
26°
3
35°
26°
4
37°
24°
5
36°
17°
6
27°
15°
7
27°
22°
8
34°
25°
9
36°
23°
10
35°
24°
11
39°
23°
12
37°
22°
13
32°
17°
14
26°
14°
15
24°
15°
16
29°
20°
17
33°
21°
18
35°
21°
19
37°
20°
20
33°
20°
21
34°
18°
22
28°
18°
23
29°
17°
24
34°
19°
25
26°
13°
26
29°
10°
27
29°
13°
28
27°
14°
29
28°
15°
30
27°
6°
31
26°
5°
1
26°
9°
2
27°
6°
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 24° to 42°, with overnight lows between 5° and 29°. The average high for December is 32° with an average low of 18°. 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.
