S
M
T
W
T
F
S
26
75°
57°
27
80°
59°
28
76°
64°
29
72°
61°
30
74°
59°
31
81°
56°
1
80°
62°
2
74°
63°
3
73°
58°
4
81°
53°
5
83°
62°
6
81°
67°
7
78°
66°
8
80°
65°
9
79°
64°
10
77°
64°
11
79°
61°
12
80°
61°
13
77°
60°
14
78°
54°
15
76°
59°
16
80°
62°
17
75°
56°
18
79°
57°
19
78°
59°
20
79°
59°
21
76°
58°
22
76°
59°
23
78°
58°
24
77°
55°
25
74°
55°
26
78°
59°
27
80°
59°
28
80°
56°
29
73°
52°
30
72°
51°
31
72°
52°
1
73°
58°
2
74°
58°
3
74°
57°
4
75°
59°
5
78°
58°
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 72° to 80°, with overnight lows between 51° and 62°. The average high for August is 77° with an average low of 57°. 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.
