S
M
T
W
T
F
S
26
37°
23°
27
41°
21°
28
43°
26°
29
49°
22°
30
54°
20°
1
68°
40°
2
61°
32°
3
65°
35°
4
44°
26°
5
42°
26°
6
50°
29°
7
57°
35°
8
58°
34°
9
59°
36°
10
59°
39°
11
60°
39°
12
61°
38°
13
62°
39°
14
63°
38°
15
55°
33°
16
58°
42°
17
57°
44°
18
59°
40°
19
66°
34°
20
57°
34°
21
59°
38°
22
59°
43°
23
62°
42°
24
62°
36°
25
63°
45°
26
70°
46°
27
71°
44°
28
61°
39°
29
68°
37°
30
61°
39°
31
66°
46°
1
62°
48°
2
62°
48°
3
63°
47°
4
63°
49°
5
64°
49°
6
63°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grayson
Grayson's May 2026 forecast shows daily high temperatures ranging from 42° to 71°, with overnight lows between 26° and 50°. The average high for May is 61° with an average low of 39°. 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 Grayson. See also: June | July | August.
