S
M
T
W
T
F
S
26
71°
51°
27
61°
45°
28
60°
43°
29
55°
36°
30
49°
32°
1
55°
37°
2
64°
32°
3
72°
46°
4
67°
44°
5
52°
38°
6
45°
33°
7
57°
31°
8
71°
35°
9
62°
46°
10
60°
37°
11
65°
34°
12
75°
49°
13
71°
48°
14
77°
42°
15
88°
57°
16
81°
56°
17
64°
53°
18
74°
54°
19
62°
50°
20
62°
42°
21
67°
43°
22
68°
51°
23
73°
53°
24
82°
46°
25
85°
64°
26
88°
63°
27
84°
53°
28
81°
53°
29
83°
54°
30
77°
50°
31
75°
53°
1
77°
52°
2
76°
54°
3
76°
55°
4
74°
55°
5
74°
54°
6
76°
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 74° to 88°, with overnight lows between 50° and 64°. The average high for May is 79° 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.
