S
M
T
W
T
F
S
26
60°
39°
27
65°
41°
28
69°
52°
29
56°
42°
30
55°
40°
1
52°
38°
2
51°
37°
3
66°
37°
4
78°
48°
5
61°
52°
6
54°
43°
7
59°
38°
8
63°
37°
9
71°
43°
10
62°
37°
11
56°
37°
12
60°
32°
13
62°
44°
14
65°
41°
15
70°
38°
16
81°
46°
17
82°
56°
18
88°
60°
19
90°
61°
20
73°
43°
21
60°
38°
22
66°
45°
23
54°
51°
24
68°
54°
25
79°
55°
26
83°
58°
27
79°
53°
28
74°
50°
29
71°
49°
30
73°
51°
31
72°
52°
1
74°
54°
2
75°
55°
3
73°
56°
4
75°
56°
5
76°
53°
6
72°
58°
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 54° to 83°, with overnight lows between 49° and 58°. The average high for May is 73° with an average low of 54°. 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.
