S
M
T
W
T
F
S
26
63°
43°
27
59°
45°
28
46°
37°
29
63°
32°
30
66°
36°
1
59°
36°
2
70°
32°
3
73°
46°
4
81°
45°
5
57°
45°
6
61°
39°
7
73°
41°
8
77°
52°
9
81°
43°
10
75°
43°
11
84°
45°
12
82°
54°
13
81°
45°
14
84°
59°
15
95°
54°
16
86°
59°
17
86°
57°
18
54°
48°
19
61°
43°
20
59°
43°
21
66°
46°
22
72°
54°
23
75°
48°
24
87°
63°
25
90°
59°
26
86°
60°
27
80°
61°
28
73°
62°
29
76°
60°
30
78°
58°
31
79°
56°
1
80°
58°
2
76°
55°
3
78°
56°
4
81°
58°
5
80°
59°
6
82°
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 90°, with overnight lows between 55° and 63°. The average high for May is 80° 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.
