S
M
T
W
T
F
S
26
93°
72°
27
92°
71°
28
92°
72°
29
91°
71°
30
89°
71°
31
88°
70°
1
86°
70°
2
87°
71°
3
87°
71°
4
88°
67°
5
87°
66°
6
86°
65°
7
86°
65°
8
87°
70°
9
85°
70°
10
86°
69°
11
86°
68°
12
87°
66°
13
86°
67°
14
87°
68°
15
87°
70°
16
90°
71°
17
92°
70°
18
92°
70°
19
91°
69°
20
92°
70°
21
87°
61°
22
84°
61°
23
85°
63°
24
87°
62°
25
86°
63°
26
92°
68°
27
93°
68°
28
93°
67°
29
88°
68°
30
92°
62°
31
91°
62°
1
87°
66°
2
91°
65°
3
92°
66°
4
92°
67°
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 84° to 93°, with overnight lows between 61° and 72°. The average high for August is 89° with an average low of 68°. 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.
