S
M
T
W
T
F
S
26
70°
50°
27
64°
45°
28
70°
48°
29
70°
54°
30
61°
45°
1
61°
41°
2
55°
41°
3
59°
36°
4
72°
45°
5
72°
52°
6
68°
55°
7
59°
48°
8
64°
41°
9
70°
50°
10
75°
48°
11
63°
43°
12
68°
39°
13
70°
50°
14
52°
43°
15
70°
41°
16
77°
52°
17
82°
61°
18
82°
63°
19
86°
64°
20
82°
59°
21
75°
59°
22
61°
54°
23
61°
54°
24
72°
55°
25
72°
64°
26
77°
64°
27
81°
64°
28
79°
52°
29
78°
59°
30
77°
51°
31
67°
58°
1
76°
50°
2
74°
51°
3
75°
50°
4
76°
56°
5
77°
57°
6
76°
60°
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 67° to 79°, with overnight lows between 50° and 60°. The average high for May is 76° with an average low of 54°. 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.
