S
M
T
W
T
F
S
26
101°
79°
27
101°
78°
28
103°
79°
29
96°
76°
30
93°
74°
31
95°
75°
1
88°
73°
2
90°
70°
3
92°
65°
4
93°
65°
5
98°
68°
6
97°
75°
7
98°
72°
8
92°
73°
9
99°
72°
10
100°
77°
11
100°
75°
12
102°
78°
13
103°
82°
14
103°
78°
15
104°
74°
16
105°
81°
17
99°
80°
18
100°
74°
19
98°
79°
20
103°
80°
21
102°
75°
22
104°
73°
23
94°
69°
24
83°
69°
25
95°
73°
26
93°
71°
27
94°
68°
28
93°
66°
29
95°
69°
30
96°
73°
31
94°
69°
1
94°
68°
2
89°
67°
3
88°
66°
4
89°
67°
5
90°
68°
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 83° to 96°, with overnight lows between 66° and 73°. The average high for August is 92° with an average low of 69°. 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.
