S
M
T
W
T
F
S
26
90°
69°
27
93°
73°
28
94°
74°
29
94°
73°
30
92°
73°
31
93°
72°
1
93°
73°
2
90°
73°
3
89°
72°
4
91°
73°
5
93°
73°
6
93°
72°
7
92°
73°
8
93°
73°
9
94°
74°
10
94°
73°
11
92°
72°
12
91°
73°
13
91°
73°
14
90°
72°
15
89°
70°
16
87°
70°
17
86°
72°
18
88°
72°
19
88°
71°
20
89°
72°
21
89°
72°
22
90°
71°
23
88°
72°
24
91°
70°
25
92°
71°
26
92°
69°
27
91°
70°
28
92°
69°
29
91°
71°
30
92°
71°
31
92°
70°
1
91°
71°
2
87°
71°
3
88°
70°
4
87°
70°
5
88°
69°
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 86° to 94°, with overnight lows between 69° and 74°. The average high for August is 91° with an average low of 72°. 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.
