S
M
T
W
T
F
S
26
74°
43°
27
71°
57°
28
64°
50°
29
61°
39°
30
63°
39°
1
55°
39°
2
59°
34°
3
72°
46°
4
82°
46°
5
57°
46°
6
58°
35°
7
60°
43°
8
63°
45°
9
75°
52°
10
63°
41°
11
64°
45°
12
66°
47°
13
72°
50°
14
76°
53°
15
76°
51°
16
69°
51°
17
68°
50°
18
73°
52°
19
75°
51°
20
68°
47°
21
67°
48°
22
66°
47°
23
68°
50°
24
69°
51°
25
70°
50°
26
70°
49°
27
72°
50°
28
72°
51°
29
74°
55°
30
79°
56°
31
80°
59°
1
80°
57°
2
75°
56°
3
81°
61°
4
82°
62°
5
82°
61°
6
76°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Princeton
Princeton's May 2026 forecast shows daily high temperatures ranging from 58° to 82°, with overnight lows between 35° and 62°. The average high for May is 72° with an average low of 51°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Princeton. See also: June | July | August.
