S
M
T
W
T
F
S
26
61°
39°
27
70°
39°
28
68°
41°
29
64°
43°
30
54°
46°
1
63°
41°
2
59°
46°
3
55°
41°
4
68°
45°
5
73°
52°
6
65°
47°
7
65°
43°
8
62°
44°
9
55°
48°
10
72°
47°
11
58°
41°
12
61°
41°
13
57°
46°
14
63°
47°
15
67°
52°
16
69°
51°
17
66°
50°
18
65°
50°
19
69°
50°
20
64°
46°
21
65°
47°
22
65°
47°
23
66°
48°
24
66°
51°
25
69°
55°
26
74°
55°
27
69°
54°
28
71°
51°
29
68°
49°
30
71°
56°
31
75°
57°
1
73°
57°
2
72°
56°
3
73°
55°
4
76°
58°
5
77°
59°
6
76°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Haddam
Haddam's May 2026 forecast shows daily high temperatures ranging from 55° to 77°, with overnight lows between 41° and 59°. The average high for May is 68° 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 Haddam. See also: June | July | August.
