S
M
T
W
T
F
S
26
86°
66°
27
86°
66°
28
85°
65°
29
84°
65°
30
83°
60°
31
78°
58°
1
78°
58°
2
79°
59°
3
80°
65°
4
79°
61°
5
79°
60°
6
81°
65°
7
84°
65°
8
81°
64°
9
80°
62°
10
81°
58°
11
81°
57°
12
83°
59°
13
82°
64°
14
85°
65°
15
84°
63°
16
85°
65°
17
86°
64°
18
85°
59°
19
82°
56°
20
77°
56°
21
76°
57°
22
77°
55°
23
77°
55°
24
78°
56°
25
79°
55°
26
80°
55°
27
81°
56°
28
79°
56°
29
76°
55°
30
75°
55°
31
78°
58°
1
81°
53°
2
76°
52°
3
74°
53°
4
75°
54°
5
77°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Harrisonville
Harrisonville's August 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 52° and 66°. The average high for August is 80° with an average low of 59°. 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 Harrisonville. See also: September | October | November.