S
M
T
W
T
F
S
26
61°
35°
27
61°
30°
28
60°
28°
29
54°
39°
30
57°
39°
1
53°
46°
2
62°
40°
3
46°
35°
4
59°
35°
5
76°
46°
6
74°
56°
7
58°
42°
8
56°
42°
9
60°
40°
10
66°
47°
11
60°
46°
12
48°
40°
13
58°
38°
14
67°
45°
15
59°
47°
16
73°
47°
17
76°
52°
18
67°
46°
19
75°
50°
20
87°
52°
21
61°
37°
22
59°
34°
23
62°
34°
24
69°
35°
25
56°
45°
26
72°
50°
27
63°
45°
28
51°
42°
29
50°
41°
30
50°
38°
31
55°
36°
1
57°
43°
2
60°
43°
3
65°
44°
4
76°
50°
5
80°
51°
6
81°
52°
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 50° to 81°, with overnight lows between 36° and 52°. The average high for May is 63° with an average low of 44°. 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.
