S
M
T
W
T
F
S
26
65°
51°
27
68°
44°
28
74°
49°
29
80°
50°
30
85°
53°
1
85°
56°
2
79°
55°
3
75°
55°
4
67°
55°
5
74°
58°
6
81°
58°
7
86°
58°
8
86°
57°
9
85°
56°
10
90°
58°
11
88°
57°
12
87°
61°
13
89°
60°
14
82°
52°
15
77°
53°
16
76°
53°
17
78°
51°
18
77°
55°
19
76°
50°
20
80°
52°
21
82°
56°
22
86°
58°
23
87°
60°
24
88°
59°
25
88°
58°
26
86°
58°
27
84°
56°
28
80°
55°
29
79°
54°
30
80°
55°
31
80°
54°
1
81°
56°
2
83°
56°
3
85°
59°
4
87°
60°
5
86°
57°
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 67° to 90°, with overnight lows between 50° and 61°. The average high for May is 82° with an average low of 56°. 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.
