S
M
T
W
T
F
S
26
89°
72°
27
90°
72°
28
87°
73°
29
87°
72°
30
89°
73°
31
90°
73°
1
92°
72°
2
94°
73°
3
94°
74°
4
93°
72°
5
94°
73°
6
93°
72°
7
90°
73°
8
91°
73°
9
89°
72°
10
88°
69°
11
87°
70°
12
88°
72°
13
91°
73°
14
90°
73°
15
89°
72°
16
89°
72°
17
92°
71°
18
93°
71°
19
91°
70°
20
90°
71°
21
92°
72°
22
93°
71°
23
92°
70°
24
92°
69°
25
91°
69°
26
92°
68°
27
88°
70°
28
88°
70°
29
87°
67°
30
88°
67°
31
91°
68°
1
91°
69°
2
90°
68°
3
89°
70°
4
90°
70°
5
91°
66°
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 87° to 94°, with overnight lows between 66° and 74°. The average high for August is 90° with an average low of 71°. 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.
