S
M
T
W
T
F
S
26
99°
64°
27
87°
66°
28
92°
65°
29
95°
69°
30
90°
67°
31
81°
62°
1
86°
57°
2
90°
65°
3
72°
55°
4
72°
52°
5
83°
46°
6
88°
52°
7
75°
52°
8
85°
48°
9
76°
53°
10
81°
48°
11
81°
58°
12
80°
59°
13
80°
59°
14
78°
58°
15
70°
59°
16
77°
55°
17
83°
57°
18
74°
50°
19
82°
51°
20
84°
56°
21
80°
54°
22
76°
48°
23
83°
47°
24
86°
62°
25
79°
57°
26
79°
50°
27
78°
53°
28
80°
61°
29
79°
61°
30
79°
55°
31
78°
56°
1
79°
55°
2
78°
55°
3
82°
59°
4
80°
56°
5
77°
57°
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 77° to 82°, with overnight lows between 50° and 61°. The average high for August is 79° 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.
