S
M
T
W
T
F
S
26
55°
25°
27
50°
36°
28
43°
28°
29
45°
30°
30
41°
25°
1
57°
21°
2
70°
34°
3
73°
32°
4
48°
34°
5
39°
30°
6
48°
30°
7
57°
21°
8
64°
37°
9
54°
32°
10
52°
27°
11
68°
30°
12
68°
41°
13
79°
37°
14
79°
57°
15
75°
46°
16
54°
36°
17
50°
32°
18
45°
39°
19
48°
32°
20
64°
28°
21
70°
46°
22
70°
45°
23
57°
39°
24
79°
39°
25
84°
54°
26
90°
46°
27
86°
55°
28
93°
55°
29
93°
65°
30
82°
62°
31
82°
62°
1
78°
56°
2
86°
59°
3
86°
61°
4
79°
55°
5
73°
54°
6
77°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grafton
Grafton's May 2026 forecast shows daily high temperatures ranging from 73° to 93°, with overnight lows between 54° and 65°. The average high for May is 82° with an average low of 59°. 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 Grafton. See also: June | July | August.
