S
M
T
W
T
F
S
26
59°
43°
27
63°
45°
28
64°
52°
29
48°
39°
30
52°
34°
1
46°
32°
2
57°
32°
3
70°
52°
4
81°
45°
5
59°
41°
6
54°
34°
7
55°
34°
8
70°
34°
9
68°
41°
10
61°
34°
11
54°
36°
12
77°
34°
13
63°
41°
14
68°
36°
15
76°
59°
16
83°
52°
17
71°
65°
18
76°
63°
19
72°
43°
20
59°
40°
21
62°
43°
22
67°
48°
23
72°
51°
24
69°
53°
25
70°
53°
26
69°
52°
27
71°
53°
28
73°
49°
29
67°
53°
30
66°
50°
31
66°
47°
1
67°
45°
2
66°
45°
3
66°
47°
4
69°
56°
5
77°
58°
6
77°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Hartford
Hartford's May 2026 forecast shows daily high temperatures ranging from 59° to 83°, with overnight lows between 40° and 65°. The average high for May is 70° 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 Hartford. See also: June | July | August.
