S
M
T
W
T
F
S
26
68°
48°
27
71°
45°
28
65°
43°
29
69°
46°
30
65°
43°
1
67°
51°
2
67°
52°
3
76°
48°
4
66°
42°
5
65°
41°
6
66°
43°
7
73°
51°
8
71°
46°
9
68°
45°
10
67°
44°
11
67°
48°
12
75°
55°
13
79°
56°
14
78°
54°
15
75°
47°
16
69°
47°
17
71°
55°
18
79°
58°
19
80°
57°
20
79°
55°
21
72°
50°
22
74°
55°
23
76°
56°
24
77°
56°
25
79°
56°
26
79°
58°
27
81°
58°
28
82°
59°
29
85°
56°
30
81°
57°
31
84°
52°
1
80°
51°
2
76°
52°
3
76°
51°
4
77°
54°
5
78°
54°
6
76°
62°
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 65° to 85°, with overnight lows between 41° and 62°. The average high for May is 74° with an average low of 51°. 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.
