S
M
T
W
T
F
S
28
73°
58°
29
75°
59°
30
74°
54°
1
72°
52°
2
73°
57°
3
73°
53°
4
72°
54°
5
73°
54°
6
75°
60°
7
80°
61°
8
81°
61°
9
81°
60°
10
77°
59°
11
80°
60°
12
81°
56°
13
74°
54°
14
75°
59°
15
79°
60°
16
79°
53°
17
74°
53°
18
73°
54°
19
74°
60°
20
74°
59°
21
75°
57°
22
75°
58°
23
76°
56°
24
75°
60°
25
78°
61°
26
81°
60°
27
81°
54°
28
75°
55°
29
75°
59°
30
76°
57°
31
76°
58°
1
79°
56°
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 72° to 81°, with overnight lows between 52° and 61°. The average high for July is 76° with an average low of 57°. 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.