S
M
T
W
T
F
S
26
103°
78°
27
102°
77°
28
101°
78°
29
102°
78°
30
103°
79°
31
103°
78°
1
102°
77°
2
101°
77°
3
102°
78°
4
102°
78°
5
101°
77°
6
102°
78°
7
102°
78°
8
101°
77°
9
102°
77°
10
98°
76°
11
99°
76°
12
100°
75°
13
99°
76°
14
98°
73°
15
99°
74°
16
99°
73°
17
98°
74°
18
99°
72°
19
98°
69°
20
93°
67°
21
92°
66°
22
91°
67°
23
92°
68°
24
98°
70°
25
98°
71°
26
97°
71°
27
98°
70°
28
98°
72°
29
97°
71°
30
97°
70°
31
96°
69°
1
96°
66°
2
95°
64°
3
93°
67°
4
95°
71°
5
95°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grandfield
Grandfield's August 2026 forecast shows daily high temperatures ranging from 91° to 103°, with overnight lows between 64° and 79°. The average high for August is 99° with an average low of 73°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Grandfield. See also: September | October | November.