S
M
T
W
T
F
S
26
53°
39°
27
64°
35°
28
63°
37°
29
61°
40°
30
54°
47°
1
60°
43°
2
58°
48°
3
57°
41°
4
65°
39°
5
69°
45°
6
62°
54°
7
64°
45°
8
61°
46°
9
64°
50°
10
60°
52°
11
61°
46°
12
61°
45°
13
66°
53°
14
58°
50°
15
61°
48°
16
74°
55°
17
79°
55°
18
72°
56°
19
81°
63°
20
79°
53°
21
67°
50°
22
66°
51°
23
68°
53°
24
70°
53°
25
68°
52°
26
73°
53°
27
66°
53°
28
65°
51°
29
66°
53°
30
66°
58°
31
73°
57°
1
67°
55°
2
68°
55°
3
67°
54°
4
68°
52°
5
69°
59°
6
72°
60°
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 58° to 81°, with overnight lows between 48° and 63°. The average high for May is 69° with an average low of 54°. 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.
