S
M
T
W
T
F
S
26
59°
33°
27
72°
32°
28
66°
53°
29
60°
44°
30
49°
36°
1
53°
32°
2
47°
37°
3
55°
34°
4
74°
45°
5
72°
46°
6
47°
41°
7
53°
33°
8
54°
35°
9
65°
35°
10
55°
35°
11
53°
31°
12
57°
29°
13
69°
43°
14
51°
41°
15
62°
42°
16
77°
38°
17
77°
56°
18
89°
60°
19
86°
64°
20
75°
46°
21
57°
38°
22
65°
35°
23
57°
49°
24
61°
53°
25
67°
48°
26
79°
55°
27
75°
52°
28
69°
46°
29
62°
48°
30
65°
47°
31
66°
50°
1
68°
51°
2
70°
52°
3
69°
54°
4
72°
54°
5
71°
55°
6
68°
49°
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 57° to 79°, with overnight lows between 46° and 55°. The average high for May is 68° with an average low of 51°. 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.
