S
M
T
W
T
F
S
28
77°
57°
29
73°
54°
30
75°
59°
1
75°
59°
2
72°
50°
3
77°
50°
4
75°
61°
5
73°
63°
6
82°
66°
7
79°
63°
8
84°
63°
9
88°
57°
10
86°
59°
11
72°
59°
12
73°
59°
13
70°
57°
14
68°
59°
15
70°
59°
16
72°
52°
17
66°
51°
18
62°
48°
19
62°
47°
20
63°
51°
21
65°
55°
22
71°
54°
23
72°
57°
24
71°
58°
25
73°
58°
26
69°
56°
27
68°
58°
28
69°
57°
29
63°
60°
30
64°
59°
31
63°
59°
1
64°
60°
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 62° to 73°, with overnight lows between 47° and 60°. The average high for July is 67° with an average low of 55°. 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.