S
M
T
W
T
F
S
26
76°
56°
27
85°
62°
28
86°
61°
29
87°
58°
30
78°
51°
31
81°
53°
1
78°
52°
2
75°
51°
3
77°
53°
4
77°
54°
5
80°
55°
6
82°
55°
7
82°
60°
8
84°
61°
9
85°
61°
10
87°
62°
11
86°
61°
12
86°
53°
13
79°
51°
14
75°
50°
15
74°
51°
16
76°
53°
17
74°
51°
18
75°
54°
19
78°
60°
20
81°
60°
21
86°
61°
22
85°
60°
23
86°
50°
24
84°
49°
25
72°
50°
26
72°
54°
27
71°
58°
28
73°
58°
29
80°
56°
30
81°
55°
31
80°
48°
1
76°
53°
2
79°
52°
3
79°
55°
4
80°
54°
5
80°
55°
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 71° to 87°, with overnight lows between 48° and 62°. The average high for August is 80° with an average low of 55°. 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.
