S
M
T
W
T
F
S
26
63°
34°
27
73°
36°
28
72°
46°
29
71°
50°
30
52°
41°
1
55°
36°
2
52°
36°
3
49°
36°
4
69°
44°
5
78°
55°
6
55°
42°
7
58°
34°
8
53°
32°
9
54°
31°
10
65°
38°
11
56°
31°
12
56°
31°
13
58°
40°
14
57°
47°
15
63°
48°
16
73°
49°
17
79°
52°
18
87°
47°
19
87°
71°
20
80°
56°
21
59°
40°
22
65°
32°
23
67°
38°
24
54°
47°
25
71°
50°
26
81°
47°
27
76°
52°
28
64°
49°
29
66°
45°
30
58°
40°
31
60°
45°
1
65°
42°
2
71°
45°
3
79°
52°
4
84°
56°
5
80°
59°
6
78°
55°
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 60° to 84°, with overnight lows between 42° and 59°. 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.
