S
M
T
W
T
F
S
26
110°
73°
27
109°
75°
28
100°
70°
29
96°
69°
30
101°
67°
31
95°
69°
1
93°
62°
2
99°
67°
3
106°
69°
4
96°
64°
5
98°
66°
6
104°
69°
7
105°
68°
8
101°
69°
9
100°
68°
10
99°
70°
11
101°
68°
12
100°
69°
13
96°
67°
14
91°
64°
15
89°
69°
16
94°
70°
17
94°
70°
18
94°
70°
19
93°
69°
20
94°
69°
21
93°
70°
22
94°
69°
23
93°
69°
24
94°
70°
25
94°
68°
26
89°
67°
27
93°
69°
28
94°
69°
29
93°
68°
30
94°
69°
31
94°
68°
1
93°
67°
2
92°
68°
3
91°
67°
4
91°
67°
5
92°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Johnson City
Johnson City's August 2026 forecast shows daily high temperatures ranging from 89° to 106°, with overnight lows between 62° and 70°. The average high for August is 95° 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 Johnson City. See also: September | October | November.
