S
M
T
W
T
F
S
26
97°
73°
27
96°
73°
28
98°
72°
29
99°
74°
30
99°
75°
31
98°
74°
1
99°
75°
2
99°
75°
3
98°
74°
4
100°
75°
5
100°
75°
6
96°
74°
7
99°
75°
8
99°
74°
9
94°
74°
10
93°
73°
11
94°
72°
12
94°
73°
13
96°
74°
14
96°
72°
15
93°
71°
16
93°
72°
17
94°
71°
18
93°
71°
19
94°
73°
20
95°
74°
21
96°
73°
22
94°
73°
23
94°
72°
24
92°
72°
25
92°
73°
26
93°
72°
27
91°
71°
28
95°
70°
29
95°
67°
30
96°
67°
31
97°
68°
1
95°
67°
2
91°
68°
3
91°
67°
4
96°
66°
5
96°
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 91° to 100°, with overnight lows between 66° and 75°. The average high for August is 95° with an average low of 72°. 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.
