S
M
T
W
T
F
S
26
62°
48°
27
70°
42°
28
60°
49°
29
59°
44°
30
57°
39°
1
51°
37°
2
52°
32°
3
61°
35°
4
75°
54°
5
59°
43°
6
58°
39°
7
56°
40°
8
63°
44°
9
63°
46°
10
63°
45°
11
63°
45°
12
64°
47°
13
65°
49°
14
64°
48°
15
69°
50°
16
72°
52°
17
71°
50°
18
70°
54°
19
72°
55°
20
72°
52°
21
71°
47°
22
67°
46°
23
66°
46°
24
67°
47°
25
67°
49°
26
68°
48°
27
68°
48°
28
69°
49°
29
69°
49°
30
71°
54°
31
76°
54°
1
71°
52°
2
74°
53°
3
75°
60°
4
77°
58°
5
79°
60°
6
81°
62°
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 56° to 81°, with overnight lows between 39° and 62°. The average high for May is 69° with an average low of 50°. 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.
