S
M
T
W
T
F
S
26
63°
51°
27
68°
48°
28
72°
39°
29
76°
51°
30
72°
53°
1
56°
51°
2
54°
48°
3
67°
42°
4
79°
45°
5
80°
52°
6
82°
56°
7
73°
53°
8
72°
47°
9
74°
49°
10
84°
58°
11
70°
47°
12
72°
40°
13
78°
46°
14
75°
53°
15
76°
46°
16
85°
49°
17
91°
61°
18
93°
68°
19
92°
65°
20
92°
65°
21
92°
64°
22
76°
62°
23
72°
61°
24
84°
64°
25
78°
69°
26
83°
71°
27
84°
69°
28
86°
63°
29
83°
62°
30
73°
55°
31
70°
52°
1
69°
56°
2
74°
58°
3
76°
58°
4
83°
60°
5
82°
62°
6
85°
63°
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 69° to 86°, with overnight lows between 52° and 71°. The average high for May is 79° with an average low of 61°. 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.
