S
M
T
W
T
F
S
26
78°
60°
27
85°
72°
28
79°
62°
29
66°
55°
30
63°
46°
1
66°
44°
2
71°
44°
3
78°
54°
4
77°
63°
5
74°
58°
6
65°
49°
7
70°
49°
8
74°
54°
9
77°
56°
10
75°
59°
11
76°
61°
12
77°
58°
13
78°
56°
14
77°
58°
15
79°
63°
16
79°
62°
17
78°
63°
18
79°
63°
19
79°
64°
20
78°
64°
21
76°
63°
22
74°
63°
23
74°
61°
24
79°
65°
25
79°
65°
26
74°
60°
27
74°
58°
28
77°
64°
29
79°
65°
30
82°
66°
31
82°
66°
1
81°
65°
2
82°
66°
3
82°
67°
4
83°
67°
5
79°
64°
6
77°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grandfield
Grandfield's May 2026 forecast shows daily high temperatures ranging from 65° to 83°, with overnight lows between 44° and 67°. The average high for May is 77° with an average low of 60°. 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 Grandfield. See also: June | July | August.