S
M
T
W
T
F
S
29
44°
29°
30
42°
32°
1
42°
30°
2
44°
32°
3
45°
31°
4
34°
22°
5
36°
29°
6
51°
26°
7
43°
21°
8
41°
18°
9
35°
17°
10
33°
15°
11
32°
16°
12
33°
17°
13
33°
19°
14
34°
25°
15
38°
22°
16
41°
26°
17
44°
19°
18
45°
18°
19
32°
15°
20
32°
13°
21
33°
15°
22
30°
13°
23
30°
15°
24
32°
19°
25
36°
26°
26
40°
29°
27
46°
25°
28
47°
26°
29
44°
24°
30
42°
24°
31
40°
23°
1
41°
18°
2
36°
20°
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 30° to 51°, with overnight lows between 13° and 32°. The average high for December is 39° 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 Princeton. See also: January | February | March.
