S
M
T
W
T
F
S
26
62°
41°
27
72°
37°
28
71°
40°
29
68°
45°
30
58°
48°
1
64°
41°
2
56°
47°
3
56°
40°
4
71°
40°
5
78°
52°
6
68°
54°
7
65°
43°
8
61°
41°
9
57°
50°
10
73°
50°
11
57°
43°
12
60°
43°
13
60°
47°
14
64°
48°
15
66°
54°
16
72°
54°
17
69°
52°
18
71°
52°
19
71°
54°
20
70°
51°
21
65°
48°
22
66°
48°
23
67°
49°
24
68°
51°
25
71°
55°
26
75°
56°
27
70°
54°
28
71°
50°
29
69°
50°
30
71°
54°
31
77°
58°
1
75°
58°
2
74°
55°
3
74°
56°
4
78°
59°
5
79°
60°
6
78°
59°
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 57° to 79°, with overnight lows between 41° and 60°. The average high for May is 69° with an average low of 52°. 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.
