S
M
T
W
T
F
S
26
99°
77°
27
99°
78°
28
98°
78°
29
98°
77°
30
98°
78°
31
99°
78°
1
98°
77°
2
99°
78°
3
99°
78°
4
98°
79°
5
100°
79°
6
100°
78°
7
99°
79°
8
100°
79°
9
100°
78°
10
99°
79°
11
99°
79°
12
100°
78°
13
99°
78°
14
99°
79°
15
98°
78°
16
98°
77°
17
94°
74°
18
94°
74°
19
96°
75°
20
95°
74°
21
94°
76°
22
93°
74°
23
94°
71°
24
93°
71°
25
95°
75°
26
94°
70°
27
90°
69°
28
93°
68°
29
91°
68°
30
93°
69°
31
96°
70°
1
96°
73°
2
95°
71°
3
95°
71°
4
94°
73°
5
94°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grapevine
Grapevine's August 2026 forecast shows daily high temperatures ranging from 90° to 100°, with overnight lows between 68° and 79°. The average high for August is 97° with an average low of 75°. 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 Grapevine. See also: September | October | November.
