S
M
T
W
T
F
S
26
46°
27°
27
34°
30°
28
50°
28°
29
54°
32°
30
55°
25°
1
61°
30°
2
72°
43°
3
68°
45°
4
50°
37°
5
43°
23°
6
54°
21°
7
61°
30°
8
68°
41°
9
61°
41°
10
72°
37°
11
82°
54°
12
70°
43°
13
90°
45°
14
72°
46°
15
72°
43°
16
73°
41°
17
54°
39°
18
41°
34°
19
57°
32°
20
70°
45°
21
55°
41°
22
61°
37°
23
72°
36°
24
83°
52°
25
84°
61°
26
84°
61°
27
80°
57°
28
79°
58°
29
79°
55°
30
76°
54°
31
73°
52°
1
70°
51°
2
73°
55°
3
70°
52°
4
70°
53°
5
74°
55°
6
73°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in New Haven
New Haven's May 2026 forecast shows daily high temperatures ranging from 70° to 84°, with overnight lows between 47° and 61°. The average high for May is 76° with an average low of 55°. 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 New Haven. See also: June | July | August.
