S
M
T
W
T
F
S
26
81°
51°
27
78°
62°
28
63°
55°
29
64°
48°
30
66°
42°
1
62°
43°
2
62°
44°
3
79°
40°
4
81°
56°
5
72°
46°
6
62°
47°
7
68°
41°
8
73°
44°
9
80°
50°
10
70°
48°
11
77°
44°
12
84°
51°
13
75°
53°
14
74°
47°
15
85°
59°
16
77°
66°
17
88°
65°
18
78°
63°
19
78°
59°
20
67°
55°
21
72°
52°
22
67°
62°
23
77°
63°
24
81°
60°
25
82°
64°
26
77°
68°
27
78°
68°
28
80°
65°
29
80°
62°
30
77°
56°
31
78°
60°
1
79°
59°
2
77°
59°
3
79°
61°
4
82°
63°
5
91°
73°
6
83°
67°
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 77° to 91°, with overnight lows between 56° and 73°. The average high for May is 80° with an average low of 63°. 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.
