S
M
T
W
T
F
S
26
90°
74°
27
94°
74°
28
97°
72°
29
96°
75°
30
98°
74°
31
93°
72°
1
87°
75°
2
91°
72°
3
85°
68°
4
90°
70°
5
92°
71°
6
92°
73°
7
91°
71°
8
93°
71°
9
93°
72°
10
93°
71°
11
94°
73°
12
95°
75°
13
97°
74°
14
97°
72°
15
95°
72°
16
96°
71°
17
96°
74°
18
97°
73°
19
97°
72°
20
98°
74°
21
93°
73°
22
90°
69°
23
93°
70°
24
90°
69°
25
89°
70°
26
90°
69°
27
91°
71°
28
89°
69°
29
88°
69°
30
87°
68°
31
85°
71°
1
84°
70°
2
84°
70°
3
85°
67°
4
83°
64°
5
83°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Postoak
Postoak's August 2026 forecast shows daily high temperatures ranging from 83° to 98°, with overnight lows between 64° and 74°. The average high for August is 90° with an average low of 70°. 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 Postoak. See also: September | October | November.
