S
M
T
W
T
F
S
29
48°
32°
30
47°
37°
1
50°
36°
2
47°
37°
3
50°
38°
4
39°
32°
5
53°
29°
6
56°
27°
7
42°
26°
8
41°
23°
9
40°
20°
10
37°
18°
11
35°
20°
12
35°
21°
13
36°
24°
14
37°
25°
15
39°
30°
16
43°
29°
17
51°
23°
18
50°
23°
19
38°
21°
20
38°
20°
21
40°
20°
22
34°
19°
23
36°
21°
24
38°
31°
25
45°
35°
26
49°
31°
27
50°
29°
28
51°
26°
29
42°
25°
30
41°
27°
31
41°
25°
1
43°
23°
2
40°
26°
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 34° to 56°, with overnight lows between 18° and 38°. The average high for December is 43° with an average low of 27°. 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.
