S
M
T
W
T
F
S
26
47°
29°
27
51°
28°
28
58°
32°
29
53°
33°
30
54°
36°
1
50°
41°
2
57°
41°
3
51°
35°
4
58°
33°
5
72°
40°
6
70°
52°
7
54°
41°
8
54°
38°
9
61°
44°
10
56°
48°
11
57°
42°
12
46°
37°
13
59°
40°
14
60°
44°
15
61°
42°
16
59°
41°
17
58°
41°
18
58°
42°
19
59°
40°
20
56°
37°
21
55°
43°
22
55°
41°
23
56°
40°
24
57°
43°
25
56°
45°
26
57°
45°
27
62°
40°
28
56°
40°
29
56°
41°
30
57°
43°
31
62°
47°
1
66°
49°
2
66°
49°
3
64°
47°
4
63°
48°
5
63°
50°
6
67°
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 46° to 67°, with overnight lows between 37° and 50°. The average high for May is 59° with an average low of 43°. 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.
