S
M
T
W
T
F
S
26
100°
75°
27
100°
73°
28
100°
73°
29
95°
75°
30
91°
73°
31
97°
75°
1
84°
72°
2
90°
68°
3
91°
63°
4
95°
66°
5
97°
66°
6
97°
70°
7
95°
70°
8
91°
72°
9
97°
70°
10
99°
70°
11
99°
70°
12
100°
72°
13
102°
72°
14
102°
70°
15
102°
68°
16
104°
72°
17
97°
75°
18
99°
73°
19
104°
73°
20
104°
75°
21
102°
72°
22
102°
70°
23
93°
68°
24
79°
70°
25
93°
72°
26
97°
70°
27
95°
66°
28
91°
66°
29
91°
63°
30
93°
61°
31
97°
64°
1
97°
68°
2
95°
70°
3
95°
70°
4
99°
72°
5
100°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Greenbrier
Greenbrier's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Greenbrier. See also: September | October | November.