S
M
T
W
T
F
S
26
87°
68°
27
87°
69°
28
88°
69°
29
84°
62°
30
82°
57°
31
87°
55°
1
79°
61°
2
89°
70°
3
86°
67°
4
84°
67°
5
83°
66°
6
83°
67°
7
84°
66°
8
85°
67°
9
86°
66°
10
87°
67°
11
85°
66°
12
84°
65°
13
83°
67°
14
81°
67°
15
82°
64°
16
81°
66°
17
82°
63°
18
88°
65°
19
88°
67°
20
89°
66°
21
87°
65°
22
87°
65°
23
88°
66°
24
88°
66°
25
87°
65°
26
86°
65°
27
86°
64°
28
85°
65°
29
85°
63°
30
86°
64°
31
86°
64°
1
86°
63°
2
87°
63°
3
85°
62°
4
81°
58°
5
81°
57°
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 81° to 89°, with overnight lows between 57° and 67°. The average high for August is 85° with an average low of 65°. 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.
