S
M
T
W
T
F
S
26
87°
66°
27
88°
67°
28
88°
67°
29
86°
66°
30
87°
67°
31
87°
67°
1
86°
66°
2
86°
67°
3
82°
66°
4
82°
66°
5
84°
67°
6
82°
66°
7
82°
66°
8
83°
64°
9
85°
65°
10
85°
66°
11
86°
66°
12
84°
65°
13
83°
65°
14
88°
61°
15
88°
63°
16
87°
65°
17
83°
64°
18
82°
65°
19
83°
64°
20
83°
60°
21
82°
58°
22
81°
57°
23
82°
58°
24
81°
58°
25
82°
59°
26
85°
62°
27
87°
58°
28
87°
63°
29
86°
64°
30
88°
62°
31
88°
62°
1
86°
60°
2
81°
61°
3
84°
62°
4
82°
56°
5
83°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Jonesborough
Jonesborough'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 85° with an average low of 63°. 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 Jonesborough. See also: September | October | November.
