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