S
M
T
W
T
F
S
26
90°
72°
27
91°
71°
28
87°
72°
29
88°
73°
30
89°
73°
31
91°
72°
1
92°
72°
2
93°
73°
3
94°
65°
4
88°
68°
5
93°
71°
6
94°
67°
7
93°
66°
8
90°
65°
9
88°
65°
10
88°
70°
11
89°
72°
12
94°
70°
13
94°
70°
14
87°
69°
15
86°
71°
16
87°
68°
17
89°
68°
18
86°
64°
19
85°
68°
20
86°
68°
21
86°
70°
22
88°
70°
23
90°
69°
24
91°
68°
25
91°
67°
26
90°
68°
27
88°
68°
28
84°
68°
29
84°
67°
30
88°
66°
31
84°
61°
1
82°
60°
2
82°
60°
3
83°
66°
4
86°
66°
5
88°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Harrison
Harrison's August 2026 forecast shows daily high temperatures ranging from 82° to 94°, with overnight lows between 60° and 73°. The average high for August is 89° with an average low of 68°. 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 Harrison. See also: September | October | November.