S
M
T
W
T
F
S
28
77°
57°
29
73°
58°
30
71°
56°
1
71°
56°
2
69°
56°
3
66°
54°
4
68°
55°
5
72°
58°
6
71°
59°
7
71°
59°
8
72°
58°
9
69°
58°
10
69°
57°
11
70°
59°
12
72°
59°
13
72°
58°
14
71°
59°
15
73°
60°
16
74°
60°
17
71°
59°
18
72°
59°
19
73°
60°
20
72°
59°
21
71°
60°
22
74°
60°
23
72°
58°
24
69°
60°
25
72°
60°
26
73°
59°
27
74°
60°
28
74°
61°
29
73°
60°
30
73°
60°
31
74°
61°
1
75°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Leiston
Leiston's July 2026 forecast shows daily high temperatures ranging from 66° to 77°, with overnight lows between 54° and 61°. The average high for July is 72° with an average low of 59°. 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 Leiston. See also: August | September | October.