S
M
T
W
T
F
S
26
84°
56°
27
84°
59°
28
75°
64°
29
81°
61°
30
67°
53°
1
68°
46°
2
69°
47°
3
69°
40°
4
80°
47°
5
77°
54°
6
72°
57°
7
70°
51°
8
72°
47°
9
75°
55°
10
82°
55°
11
78°
52°
12
79°
51°
13
82°
57°
14
75°
47°
15
81°
47°
16
84°
57°
17
91°
60°
18
90°
63°
19
91°
71°
20
92°
70°
21
80°
68°
22
76°
68°
23
85°
68°
24
78°
66°
25
75°
67°
26
80°
69°
27
84°
68°
28
82°
71°
29
81°
63°
30
79°
64°
31
80°
63°
1
79°
66°
2
80°
66°
3
82°
65°
4
83°
66°
5
95°
73°
6
83°
67°
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 75° to 95°, with overnight lows between 63° and 73°. The average high for May is 82° with an average low of 67°. 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.
