S
M
T
W
T
F
S
26
89°
69°
27
88°
75°
28
88°
74°
29
78°
63°
30
65°
60°
1
60°
55°
2
76°
53°
3
82°
49°
4
82°
59°
5
85°
66°
6
80°
55°
7
72°
53°
8
80°
59°
9
81°
64°
10
85°
68°
11
77°
64°
12
83°
54°
13
87°
56°
14
88°
65°
15
91°
65°
16
90°
71°
17
91°
73°
18
90°
75°
19
86°
69°
20
77°
69°
21
75°
68°
22
77°
68°
23
79°
66°
24
80°
67°
25
81°
69°
26
82°
68°
27
85°
69°
28
84°
67°
29
85°
66°
30
84°
68°
31
89°
67°
1
89°
71°
2
88°
71°
3
85°
70°
4
84°
67°
5
85°
69°
6
88°
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 75° to 90°, with overnight lows between 66° and 75°. The average high for May is 84° with an average low of 69°. 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.
