S
M
T
W
T
F
S
26
77°
54°
27
82°
50°
28
81°
59°
29
68°
52°
30
64°
43°
1
64°
39°
2
60°
38°
3
65°
49°
4
76°
59°
5
73°
57°
6
65°
45°
7
59°
39°
8
64°
48°
9
71°
49°
10
72°
51°
11
72°
54°
12
73°
52°
13
72°
54°
14
69°
53°
15
73°
58°
16
74°
57°
17
74°
59°
18
79°
59°
19
76°
58°
20
77°
60°
21
80°
60°
22
80°
59°
23
78°
59°
24
74°
57°
25
77°
60°
26
79°
61°
27
77°
59°
28
74°
60°
29
76°
58°
30
75°
54°
31
78°
61°
1
78°
61°
2
81°
63°
3
82°
59°
4
77°
55°
5
76°
55°
6
76°
56°
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 59° to 82°, with overnight lows between 38° and 63°. The average high for May is 74° 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.
