S
M
T
W
T
F
S
26
91°
69°
27
94°
67°
28
93°
66°
29
93°
71°
30
96°
71°
31
95°
71°
1
96°
71°
2
96°
70°
3
95°
71°
4
95°
70°
5
94°
69°
6
92°
65°
7
85°
64°
8
85°
64°
9
87°
67°
10
88°
69°
11
94°
70°
12
94°
71°
13
95°
70°
14
94°
70°
15
93°
69°
16
93°
69°
17
92°
68°
18
93°
69°
19
93°
68°
20
86°
67°
21
85°
66°
22
84°
65°
23
84°
66°
24
85°
67°
25
83°
67°
26
84°
65°
27
83°
63°
28
89°
64°
29
91°
64°
30
91°
63°
31
90°
64°
1
92°
65°
2
91°
64°
3
91°
62°
4
90°
65°
5
92°
64°
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 83° to 96°, with overnight lows between 62° and 71°. The average high for August is 91° with an average low of 67°. 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.
