S
M
T
W
T
F
S
26
89°
74°
27
88°
73°
28
86°
72°
29
87°
73°
30
88°
73°
31
87°
69°
1
86°
68°
2
85°
71°
3
84°
73°
4
87°
73°
5
87°
71°
6
88°
71°
7
89°
73°
8
87°
73°
9
87°
72°
10
90°
72°
11
90°
71°
12
88°
72°
13
89°
70°
14
88°
72°
15
91°
71°
16
91°
72°
17
90°
72°
18
90°
71°
19
90°
67°
20
90°
67°
21
85°
68°
22
85°
67°
23
86°
66°
24
85°
66°
25
85°
67°
26
86°
68°
27
86°
67°
28
87°
68°
29
89°
67°
30
89°
66°
31
86°
68°
1
88°
70°
2
89°
67°
3
84°
65°
4
85°
66°
5
84°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Johnsonville
Johnsonville's August 2026 forecast shows daily high temperatures ranging from 84° to 91°, with overnight lows between 65° and 74°. The average high for August is 87° 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 Johnsonville. See also: September | October | November.