S
M
T
W
T
F
S
28
96°
78°
29
95°
79°
30
93°
71°
1
91°
70°
2
93°
75°
3
98°
73°
4
93°
68°
5
89°
68°
6
91°
69°
7
90°
72°
8
93°
73°
9
97°
69°
10
92°
70°
11
91°
71°
12
97°
69°
13
96°
71°
14
101°
72°
15
100°
71°
16
91°
66°
17
94°
72°
18
96°
75°
19
97°
74°
20
95°
73°
21
96°
74°
22
96°
74°
23
97°
73°
24
96°
74°
25
95°
74°
26
94°
73°
27
94°
73°
28
93°
72°
29
93°
70°
30
94°
71°
31
87°
71°
1
88°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Jamestown
Jamestown's July 2026 forecast shows daily high temperatures ranging from 87° to 101°, with overnight lows between 66° and 75°. The average high for July is 94° with an average low of 71°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Jamestown. See also: August | September | October.