S
M
T
W
T
F
S
26
37°
23°
27
41°
21°
28
43°
26°
29
49°
22°
30
54°
20°
1
69°
31°
2
63°
33°
3
67°
32°
4
42°
26°
5
42°
24°
6
50°
26°
7
57°
35°
8
61°
37°
9
59°
36°
10
57°
37°
11
62°
39°
12
65°
41°
13
60°
39°
14
57°
38°
15
64°
38°
16
61°
42°
17
68°
44°
18
68°
45°
19
58°
38°
20
58°
37°
21
59°
36°
22
64°
40°
23
65°
42°
24
62°
39°
25
63°
38°
26
61°
36°
27
62°
37°
28
69°
46°
29
61°
44°
30
66°
47°
31
72°
48°
1
73°
50°
2
74°
49°
3
74°
50°
4
75°
50°
5
73°
49°
6
72°
51°
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 75°, with overnight lows between 24° and 51°. The average high for May is 63° with an average low of 40°. 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.
