S
M
T
W
T
F
S
26
66°
42°
27
62°
48°
28
63°
45°
29
51°
34°
30
49°
29°
1
47°
26°
2
62°
24°
3
72°
45°
4
78°
36°
5
55°
36°
6
52°
27°
7
57°
28°
8
70°
25°
9
63°
36°
10
61°
27°
11
60°
27°
12
79°
40°
13
64°
39°
14
71°
31°
15
83°
46°
16
86°
56°
17
63°
48°
18
81°
52°
19
68°
50°
20
62°
46°
21
59°
43°
22
67°
48°
23
74°
53°
24
79°
54°
25
84°
50°
26
92°
53°
27
84°
61°
28
76°
50°
29
82°
43°
30
73°
45°
31
78°
50°
1
77°
47°
2
81°
43°
3
84°
56°
4
86°
62°
5
81°
58°
6
83°
58°
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 73° to 86°, with overnight lows between 43° and 62°. The average high for May is 80° with an average low of 52°. 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.
