S
M
T
W
T
F
S
26
59°
43°
27
63°
45°
28
64°
52°
29
48°
39°
30
52°
34°
1
46°
32°
2
57°
32°
3
70°
52°
4
81°
45°
5
59°
41°
6
54°
34°
7
55°
34°
8
70°
34°
9
68°
41°
10
61°
34°
11
54°
36°
12
77°
34°
13
63°
41°
14
63°
47°
15
72°
54°
16
80°
52°
17
63°
60°
18
84°
57°
19
72°
50°
20
59°
42°
21
57°
44°
22
59°
45°
23
65°
50°
24
67°
52°
25
70°
56°
26
69°
54°
27
70°
50°
28
72°
54°
29
66°
54°
30
65°
52°
31
65°
49°
1
66°
47°
2
65°
47°
3
65°
49°
4
68°
57°
5
76°
59°
6
76°
59°
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 57° to 84°, with overnight lows between 42° and 60°. The average high for May is 68° 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 Grafton. See also: June | July | August.
