S
M
T
W
T
F
S
26
88°
66°
27
93°
63°
28
89°
62°
29
88°
64°
30
89°
65°
31
94°
70°
1
95°
64°
2
96°
63°
3
89°
62°
4
87°
61°
5
88°
62°
6
86°
60°
7
87°
61°
8
88°
62°
9
88°
65°
10
92°
66°
11
92°
69°
12
94°
69°
13
95°
68°
14
94°
68°
15
94°
65°
16
93°
63°
17
89°
62°
18
90°
62°
19
90°
64°
20
89°
66°
21
90°
66°
22
89°
65°
23
90°
66°
24
91°
67°
25
92°
66°
26
89°
65°
27
86°
63°
28
86°
60°
29
87°
61°
30
87°
62°
31
88°
61°
1
88°
63°
2
86°
61°
3
88°
60°
4
90°
56°
5
84°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Johnson
Johnson's August 2026 forecast shows daily high temperatures ranging from 84° to 96°, with overnight lows between 56° and 70°. The average high for August is 90° with an average low of 64°. 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 Johnson. See also: September | October | November.