S
M
T
W
T
F
S
28
77°
61°
29
81°
59°
30
74°
56°
1
75°
55°
2
76°
62°
3
79°
63°
4
78°
62°
5
77°
62°
6
79°
63°
7
82°
64°
8
83°
64°
9
83°
63°
10
84°
64°
11
84°
65°
12
83°
64°
13
81°
60°
14
78°
58°
15
82°
64°
16
81°
64°
17
77°
62°
18
78°
61°
19
79°
64°
20
77°
64°
21
77°
63°
22
78°
63°
23
77°
61°
24
77°
61°
25
78°
62°
26
79°
64°
27
79°
58°
28
78°
57°
29
79°
59°
30
82°
63°
31
84°
62°
1
82°
57°
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 74° to 84°, with overnight lows between 55° and 65°. The average high for July is 79° with an average low of 62°. 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.