S
M
T
W
T
F
S
26
85°
69°
27
88°
71°
28
84°
67°
29
67°
59°
30
63°
56°
1
66°
53°
2
76°
47°
3
82°
50°
4
82°
61°
5
90°
59°
6
60°
53°
7
75°
50°
8
78°
57°
9
85°
66°
10
76°
61°
11
77°
58°
12
80°
55°
13
87°
57°
14
89°
64°
15
88°
68°
16
85°
78°
17
86°
81°
18
90°
78°
19
82°
64°
20
81°
63°
21
74°
67°
22
84°
68°
23
84°
66°
24
86°
66°
25
89°
65°
26
87°
66°
27
77°
66°
28
83°
68°
29
84°
67°
30
87°
66°
31
80°
64°
1
83°
64°
2
83°
63°
3
81°
62°
4
83°
64°
5
88°
68°
6
86°
71°
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 77° to 89°, with overnight lows between 62° and 71°. The average high for May is 84° with an average low of 66°. 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.
