S
M
T
W
T
F
S
26
75°
54°
27
70°
47°
28
60°
45°
29
60°
41°
30
61°
38°
1
60°
37°
2
61°
36°
3
72°
48°
4
82°
53°
5
56°
46°
6
58°
41°
7
69°
39°
8
69°
43°
9
78°
49°
10
69°
38°
11
78°
43°
12
82°
56°
13
77°
51°
14
77°
59°
15
89°
64°
16
83°
65°
17
85°
69°
18
77°
53°
19
64°
47°
20
68°
51°
21
65°
50°
22
73°
53°
23
72°
52°
24
78°
56°
25
79°
59°
26
75°
54°
27
77°
59°
28
76°
58°
29
79°
55°
30
71°
54°
31
71°
56°
1
72°
52°
2
72°
56°
3
73°
62°
4
81°
63°
5
82°
64°
6
79°
64°
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 64° to 89°, with overnight lows between 47° and 69°. The average high for May is 76° with an average low of 57°. 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.
