S
M
T
W
T
F
S
26
85°
67°
27
84°
67°
28
82°
66°
29
82°
67°
30
83°
64°
31
82°
61°
1
81°
62°
2
82°
65°
3
82°
67°
4
83°
66°
5
82°
64°
6
84°
66°
7
84°
67°
8
82°
66°
9
83°
63°
10
88°
65°
11
83°
66°
12
83°
66°
13
85°
65°
14
84°
66°
15
85°
65°
16
88°
65°
17
88°
64°
18
86°
65°
19
86°
59°
20
81°
58°
21
81°
58°
22
82°
58°
23
82°
57°
24
83°
57°
25
82°
58°
26
82°
57°
27
83°
58°
28
85°
58°
29
84°
59°
30
84°
58°
31
86°
61°
1
85°
62°
2
86°
57°
3
81°
56°
4
82°
57°
5
84°
58°
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 88°, with overnight lows between 56° and 67°. The average high for August is 84° with an average low of 62°. 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.
