S
M
T
W
T
F
S
26
85°
71°
27
95°
73°
28
90°
71°
29
66°
57°
30
62°
59°
1
63°
46°
2
76°
52°
3
78°
56°
4
84°
66°
5
84°
63°
6
81°
52°
7
77°
57°
8
77°
62°
9
78°
61°
10
82°
64°
11
85°
62°
12
83°
62°
13
82°
63°
14
83°
60°
15
86°
66°
16
85°
66°
17
86°
65°
18
86°
66°
19
87°
67°
20
87°
67°
21
84°
66°
22
80°
65°
23
81°
66°
24
86°
68°
25
83°
66°
26
81°
60°
27
80°
61°
28
82°
67°
29
84°
68°
30
87°
67°
31
88°
69°
1
90°
68°
2
90°
70°
3
91°
70°
4
92°
69°
5
91°
70°
6
89°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Granbury
Granbury's May 2026 forecast shows daily high temperatures ranging from 63° to 92°, with overnight lows between 46° and 70°. The average high for May is 83° 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 Granbury. See also: June | July | August.