S
M
T
W
T
F
S
26
59°
41°
27
69°
38°
28
62°
40°
29
65°
48°
30
63°
47°
1
64°
42°
2
61°
46°
3
60°
43°
4
72°
42°
5
82°
54°
6
68°
55°
7
65°
49°
8
66°
44°
9
64°
48°
10
77°
47°
11
61°
47°
12
66°
40°
13
74°
49°
14
65°
51°
15
67°
50°
16
82°
45°
17
87°
61°
18
94°
62°
19
96°
68°
20
93°
63°
21
63°
54°
22
66°
53°
23
54°
50°
24
58°
51°
25
73°
55°
26
82°
57°
27
82°
64°
28
77°
58°
29
77°
53°
30
65°
44°
31
77°
54°
1
75°
49°
2
73°
49°
3
76°
51°
4
81°
56°
5
86°
63°
6
87°
62°
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 65° to 87°, with overnight lows between 44° and 63°. The average high for May is 78° with an average low of 54°. 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.
