S
M
T
W
T
F
S
26
79°
61°
27
82°
60°
28
77°
61°
29
76°
60°
30
78°
61°
31
82°
62°
1
82°
62°
2
80°
61°
3
84°
61°
4
84°
60°
5
79°
55°
6
78°
57°
7
79°
56°
8
75°
57°
9
74°
54°
10
75°
54°
11
77°
60°
12
83°
60°
13
77°
54°
14
78°
53°
15
76°
52°
16
77°
60°
17
79°
57°
18
76°
52°
19
76°
52°
20
78°
53°
21
78°
55°
22
82°
59°
23
83°
59°
24
83°
58°
25
81°
58°
26
82°
59°
27
83°
54°
28
81°
58°
29
82°
58°
30
80°
51°
31
75°
48°
1
73°
49°
2
73°
48°
3
72°
48°
4
73°
49°
5
72°
49°
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 84°, with overnight lows between 48° and 62°. The average high for August is 78° with an average low of 56°. 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.
