S
M
T
W
T
F
S
26
59°
22°
27
58°
25°
28
65°
26°
29
66°
39°
30
69°
30°
1
76°
30°
2
79°
35°
3
80°
35°
4
79°
37°
5
77°
39°
6
81°
36°
7
82°
45°
8
81°
43°
9
79°
43°
10
91°
35°
11
89°
50°
12
95°
44°
13
79°
41°
14
78°
34°
15
72°
37°
16
61°
42°
17
56°
32°
18
64°
30°
19
70°
31°
20
76°
35°
21
74°
40°
22
80°
34°
23
87°
39°
24
88°
48°
25
90°
52°
26
62°
43°
27
73°
44°
28
65°
42°
29
60°
40°
30
64°
38°
31
68°
41°
1
76°
47°
2
83°
49°
3
77°
48°
4
78°
51°
5
85°
54°
6
79°
45°
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 85°, with overnight lows between 38° and 54°. The average high for May is 74° with an average low of 46°. 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.
