S
M
T
W
T
F
S
26
99°
79°
27
100°
80°
28
100°
80°
29
99°
81°
30
101°
81°
31
103°
82°
1
98°
80°
2
96°
73°
3
101°
74°
4
101°
80°
5
101°
81°
6
101°
81°
7
101°
81°
8
101°
82°
9
100°
78°
10
99°
79°
11
101°
78°
12
102°
81°
13
102°
82°
14
102°
80°
15
102°
81°
16
104°
82°
17
106°
81°
18
105°
82°
19
105°
83°
20
105°
82°
21
99°
85°
22
105°
80°
23
109°
84°
24
109°
86°
25
101°
82°
26
102°
76°
27
100°
78°
28
100°
79°
29
101°
80°
30
100°
81°
31
100°
78°
1
100°
79°
2
98°
78°
3
97°
77°
4
97°
76°
5
96°
77°
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 96° to 102°, with overnight lows between 76° and 81°. The average high for August is 99° with an average low of 78°. 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.
