S
M
T
W
T
F
S
26
67°
34°
27
74°
32°
28
72°
40°
29
69°
37°
30
54°
43°
1
61°
36°
2
56°
36°
3
56°
40°
4
72°
44°
5
80°
41°
6
60°
44°
7
58°
31°
8
55°
31°
9
52°
29°
10
67°
45°
11
60°
31°
12
63°
34°
13
54°
41°
14
56°
48°
15
65°
48°
16
78°
43°
17
86°
49°
18
91°
50°
19
88°
63°
20
78°
59°
21
61°
41°
22
67°
39°
23
65°
41°
24
54°
51°
25
72°
48°
26
81°
57°
27
83°
54°
28
69°
47°
29
64°
47°
30
64°
43°
31
70°
46°
1
69°
50°
2
68°
48°
3
77°
55°
4
75°
54°
5
77°
54°
6
75°
50°
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 54° to 83°, with overnight lows between 43° and 57°. The average high for May is 71° with an average low of 50°. 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.
