S
M
T
W
T
F
S
26
76°
67°
27
76°
68°
28
77°
65°
29
78°
66°
30
79°
67°
31
80°
68°
1
81°
61°
2
79°
60°
3
76°
62°
4
76°
62°
5
75°
61°
6
76°
61°
7
76°
62°
8
77°
63°
9
76°
65°
10
76°
67°
11
77°
67°
12
77°
66°
13
78°
67°
14
81°
64°
15
81°
62°
16
78°
66°
17
78°
61°
18
77°
60°
19
76°
61°
20
75°
60°
21
76°
64°
22
75°
63°
23
75°
62°
24
76°
67°
25
75°
66°
26
80°
67°
27
78°
67°
28
80°
66°
29
80°
67°
30
77°
62°
31
79°
60°
1
75°
60°
2
74°
61°
3
74°
65°
4
73°
61°
5
78°
60°
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 73° to 81°, with overnight lows between 60° and 68°. The average high for August is 77° with an average low of 64°. 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.
