S
M
T
W
T
F
S
26
61°
21°
27
65°
29°
28
62°
35°
29
72°
28°
30
75°
32°
1
76°
36°
2
77°
38°
3
82°
43°
4
79°
45°
5
82°
44°
6
78°
44°
7
73°
41°
8
69°
40°
9
74°
42°
10
77°
43°
11
79°
44°
12
75°
42°
13
71°
40°
14
70°
39°
15
67°
33°
16
59°
41°
17
62°
34°
18
58°
34°
19
59°
35°
20
60°
33°
21
68°
37°
22
69°
40°
23
62°
35°
24
71°
41°
25
71°
39°
26
66°
37°
27
71°
39°
28
72°
40°
29
72°
39°
30
73°
43°
31
74°
45°
1
74°
44°
2
73°
42°
3
73°
42°
4
70°
39°
5
69°
38°
6
68°
38°
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 33° and 45°. The average high for May is 71° with an average low of 40°. 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.
