S
M
T
W
T
F
S
26
63°
46°
27
82°
41°
28
77°
55°
29
68°
53°
30
57°
41°
1
61°
36°
2
55°
35°
3
64°
31°
4
75°
48°
5
76°
60°
6
64°
52°
7
63°
39°
8
71°
37°
9
72°
54°
10
71°
53°
11
71°
47°
12
76°
44°
13
75°
48°
14
62°
43°
15
70°
39°
16
73°
47°
17
87°
62°
18
91°
62°
19
88°
70°
20
76°
59°
21
61°
52°
22
70°
57°
23
79°
61°
24
75°
64°
25
79°
65°
26
76°
63°
27
77°
60°
28
80°
49°
29
78°
52°
30
77°
48°
31
76°
48°
1
73°
49°
2
76°
51°
3
78°
55°
4
79°
54°
5
78°
56°
6
80°
57°
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 73° to 80°, with overnight lows between 48° and 60°. The average high for May is 77° with an average low of 53°. 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.
