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°
50°
13
77°
52°
14
77°
59°
15
89°
64°
16
85°
65°
17
85°
67°
18
77°
53°
19
72°
49°
20
73°
53°
21
74°
52°
22
77°
58°
23
76°
56°
24
78°
56°
25
75°
54°
26
77°
60°
27
78°
59°
28
78°
60°
29
75°
56°
30
71°
52°
31
73°
57°
1
73°
61°
2
75°
62°
3
76°
61°
4
78°
61°
5
81°
62°
6
78°
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 71° to 89°, with overnight lows between 49° and 67°. The average high for May is 77° with an average low of 58°. 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.
