S
M
T
W
T
F
S
28
92°
72°
29
92°
69°
30
94°
68°
1
98°
70°
2
102°
72°
3
104°
73°
4
102°
73°
5
90°
71°
6
90°
71°
7
91°
69°
8
93°
70°
9
87°
72°
10
92°
73°
11
93°
73°
12
92°
72°
13
88°
72°
14
88°
71°
15
89°
72°
16
90°
73°
17
92°
73°
18
92°
72°
19
93°
73°
20
93°
74°
21
92°
74°
22
93°
73°
23
94°
74°
24
94°
74°
25
93°
73°
26
92°
73°
27
89°
72°
28
90°
73°
29
93°
74°
30
93°
73°
31
91°
73°
1
87°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Preston
Preston's July 2026 forecast shows daily high temperatures ranging from 87° to 104°, with overnight lows between 68° and 74°. The average high for July is 93° with an average low of 72°. 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 Preston. See also: August | September | October.