S
M
T
W
T
F
S
26
35°
30°
27
36°
26°
28
58°
25°
29
58°
29°
30
57°
29°
1
53°
33°
2
50°
38°
3
58°
41°
4
45°
40°
5
63°
39°
6
69°
45°
7
57°
44°
8
50°
42°
9
56°
38°
10
53°
39°
11
54°
38°
12
50°
47°
13
55°
41°
14
56°
43°
15
55°
40°
16
54°
39°
17
50°
39°
18
54°
41°
19
52°
40°
20
51°
36°
21
51°
39°
22
51°
39°
23
49°
40°
24
55°
40°
25
55°
39°
26
50°
41°
27
53°
41°
28
52°
39°
29
51°
38°
30
50°
38°
31
50°
39°
1
52°
42°
2
58°
43°
3
54°
42°
4
55°
39°
5
52°
39°
6
55°
41°
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 49° to 58°, with overnight lows between 36° and 47°. The average high for May is 53° with an average low of 40°. 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.
