S
M
T
W
T
F
S
26
55°
35°
27
58°
36°
28
59°
39°
29
64°
35°
30
71°
40°
1
73°
44°
2
75°
45°
3
78°
45°
4
81°
46°
5
76°
47°
6
73°
46°
7
74°
45°
8
70°
41°
9
70°
43°
10
69°
41°
11
67°
42°
12
65°
39°
13
60°
39°
14
61°
35°
15
67°
41°
16
67°
42°
17
65°
44°
18
63°
43°
19
63°
44°
20
61°
45°
21
63°
43°
22
61°
39°
23
61°
39°
24
66°
43°
25
69°
42°
26
71°
46°
27
72°
48°
28
71°
47°
29
69°
45°
30
71°
48°
31
65°
48°
1
67°
46°
2
68°
46°
3
72°
48°
4
68°
47°
5
69°
45°
6
71°
49°
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 60° to 81°, with overnight lows between 35° and 49°. The average high for May is 68° with an average low of 44°. 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.
