S
M
T
W
T
F
S
26
82°
69°
27
83°
69°
28
82°
68°
29
83°
69°
30
83°
65°
31
82°
62°
1
81°
64°
2
81°
68°
3
86°
68°
4
83°
65°
5
84°
67°
6
87°
69°
7
86°
68°
8
82°
67°
9
83°
66°
10
84°
63°
11
84°
67°
12
87°
68°
13
88°
66°
14
86°
67°
15
85°
66°
16
88°
67°
17
87°
66°
18
87°
59°
19
84°
59°
20
80°
60°
21
80°
59°
22
81°
59°
23
81°
60°
24
82°
59°
25
84°
59°
26
83°
60°
27
86°
59°
28
84°
57°
29
81°
58°
30
81°
57°
31
82°
58°
1
85°
59°
2
83°
60°
3
80°
62°
4
85°
61°
5
85°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Jamestown
Jamestown's August 2026 forecast shows daily high temperatures ranging from 80° to 88°, with overnight lows between 57° and 69°. The average high for August is 84° 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 Jamestown. See also: September | October | November.
