S
M
T
W
T
F
S
26
85°
64°
27
85°
64°
28
84°
63°
29
81°
63°
30
83°
62°
31
84°
63°
1
84°
63°
2
81°
60°
3
77°
58°
4
78°
62°
5
82°
62°
6
83°
63°
7
82°
60°
8
77°
57°
9
78°
61°
10
83°
61°
11
84°
62°
12
84°
62°
13
76°
59°
14
76°
60°
15
79°
61°
16
81°
61°
17
84°
60°
18
84°
61°
19
83°
62°
20
84°
62°
21
74°
52°
22
75°
49°
23
73°
54°
24
74°
49°
25
73°
47°
26
71°
48°
27
70°
48°
28
71°
49°
29
72°
54°
30
78°
58°
31
78°
56°
1
76°
54°
2
80°
59°
3
84°
52°
4
78°
48°
5
77°
50°
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 70° to 85°, with overnight lows between 47° and 64°. The average high for August is 79° with an average low of 58°. 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.
