S
M
T
W
T
F
S
26
86°
67°
27
91°
72°
28
91°
72°
29
92°
71°
30
88°
72°
31
88°
72°
1
90°
71°
2
90°
72°
3
89°
73°
4
91°
73°
5
92°
72°
6
91°
72°
7
90°
71°
8
91°
72°
9
92°
73°
10
92°
72°
11
91°
71°
12
85°
72°
13
86°
72°
14
88°
71°
15
85°
68°
16
82°
68°
17
83°
70°
18
84°
71°
19
85°
71°
20
85°
70°
21
86°
71°
22
85°
70°
23
86°
71°
24
90°
70°
25
90°
69°
26
89°
69°
27
88°
70°
28
89°
70°
29
85°
69°
30
87°
69°
31
84°
67°
1
81°
68°
2
82°
68°
3
86°
69°
4
85°
69°
5
82°
68°
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 81° to 92°, with overnight lows between 67° and 73°. The average high for August is 87° with an average low of 70°. 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.
