S
M
T
W
T
F
S
26
84°
61°
27
81°
65°
28
73°
64°
29
81°
64°
30
72°
58°
1
66°
54°
2
70°
48°
3
71°
41°
4
80°
46°
5
78°
57°
6
80°
66°
7
73°
54°
8
70°
52°
9
77°
58°
10
84°
63°
11
79°
63°
12
79°
60°
13
82°
54°
14
76°
52°
15
82°
50°
16
84°
61°
17
91°
66°
18
89°
70°
19
90°
67°
20
86°
68°
21
83°
62°
22
80°
63°
23
81°
63°
24
82°
64°
25
81°
62°
26
83°
61°
27
82°
62°
28
85°
63°
29
84°
60°
30
86°
64°
31
85°
63°
1
87°
65°
2
88°
65°
3
86°
64°
4
82°
63°
5
83°
63°
6
84°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grayson Valley
Grayson Valley's May 2026 forecast shows daily high temperatures ranging from 80° to 91°, with overnight lows between 60° and 70°. The average high for May is 85° with an average low of 64°. 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 Valley. See also: June | July | August.
