S
M
T
W
T
F
S
26
83°
67°
27
84°
63°
28
84°
63°
29
81°
61°
30
80°
67°
31
81°
65°
1
84°
65°
2
86°
67°
3
86°
68°
4
85°
66°
5
84°
62°
6
81°
61°
7
87°
67°
8
87°
66°
9
84°
67°
10
87°
65°
11
81°
61°
12
85°
66°
13
86°
66°
14
86°
60°
15
79°
59°
16
78°
58°
17
80°
64°
18
78°
66°
19
81°
65°
20
81°
64°
21
82°
65°
22
80°
65°
23
79°
61°
24
85°
57°
25
82°
64°
26
87°
64°
27
85°
63°
28
86°
64°
29
79°
58°
30
78°
57°
31
79°
62°
1
81°
63°
2
76°
64°
3
85°
64°
4
85°
62°
5
82°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Jonestown
Jonestown's August 2026 forecast shows daily high temperatures ranging from 76° to 87°, with overnight lows between 57° and 68°. The average high for August is 83° 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 Jonestown. See also: September | October | November.