S
M
T
W
T
F
S
26
69°
45°
27
67°
49°
28
62°
50°
29
53°
41°
30
50°
39°
1
49°
27°
2
49°
33°
3
62°
44°
4
76°
47°
5
55°
36°
6
51°
38°
7
49°
34°
8
57°
44°
9
58°
41°
10
61°
44°
11
62°
45°
12
62°
45°
13
63°
44°
14
62°
45°
15
64°
43°
16
61°
42°
17
63°
50°
18
69°
51°
19
66°
52°
20
70°
53°
21
71°
53°
22
69°
52°
23
70°
46°
24
63°
44°
25
64°
48°
26
68°
54°
27
70°
54°
28
66°
50°
29
66°
48°
30
67°
51°
31
67°
47°
1
68°
50°
2
70°
54°
3
68°
48°
4
68°
47°
5
69°
48°
6
68°
49°
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 49° to 76°, with overnight lows between 27° and 54°. The average high for May is 64° with an average low of 46°. 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.
