S
M
T
W
T
F
S
28
92°
72°
29
94°
72°
30
94°
74°
1
92°
72°
2
93°
71°
3
96°
70°
4
97°
72°
5
94°
73°
6
92°
71°
7
95°
71°
8
93°
72°
9
94°
73°
10
94°
71°
11
95°
71°
12
94°
75°
13
88°
71°
14
82°
71°
15
87°
71°
16
88°
70°
17
90°
72°
18
90°
71°
19
87°
72°
20
89°
71°
21
92°
70°
22
91°
70°
23
88°
71°
24
88°
70°
25
89°
71°
26
88°
70°
27
91°
72°
28
88°
72°
29
92°
71°
30
91°
72°
31
92°
72°
1
92°
73°
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 82° to 92°, with overnight lows between 70° and 73°. The average high for July is 89° 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 Preston. See also: August | September | October.