S
M
T
W
T
F
S
26
99°
72°
27
98°
72°
28
102°
72°
29
98°
74°
30
95°
74°
31
96°
73°
1
88°
70°
2
92°
65°
3
94°
63°
4
100°
69°
5
98°
73°
6
96°
74°
7
93°
72°
8
98°
70°
9
100°
71°
10
98°
72°
11
93°
73°
12
94°
72°
13
97°
72°
14
95°
71°
15
95°
72°
16
96°
69°
17
92°
67°
18
95°
72°
19
94°
71°
20
95°
72°
21
95°
71°
22
94°
72°
23
94°
71°
24
93°
71°
25
94°
70°
26
94°
71°
27
93°
70°
28
94°
71°
29
93°
69°
30
94°
70°
31
93°
70°
1
92°
69°
2
92°
69°
3
91°
68°
4
92°
68°
5
92°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Harvey
Harvey's August 2026 forecast shows daily high temperatures ranging from 91° to 100°, with overnight lows between 67° and 74°. The average high for August is 95° with an average low of 71°. 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 Harvey. See also: September | October | November.