S
M
T
W
T
F
S
26
81°
64°
27
85°
61°
28
84°
66°
29
80°
59°
30
85°
54°
31
85°
59°
1
79°
69°
2
76°
64°
3
81°
60°
4
82°
54°
5
86°
63°
6
86°
68°
7
79°
68°
8
84°
63°
9
85°
69°
10
88°
69°
11
83°
66°
12
80°
65°
13
78°
63°
14
78°
61°
15
77°
59°
16
78°
60°
17
78°
62°
18
77°
62°
19
78°
61°
20
85°
65°
21
83°
64°
22
85°
65°
23
86°
66°
24
85°
65°
25
84°
65°
26
82°
64°
27
81°
64°
28
79°
63°
29
80°
64°
30
79°
63°
31
81°
63°
1
83°
62°
2
79°
58°
3
76°
57°
4
78°
59°
5
82°
59°
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 76° to 88°, with overnight lows between 57° and 69°. The average high for August is 81° with an average low of 63°. 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.
