S
M
T
W
T
F
S
28
66°
50°
29
67°
54°
30
62°
48°
1
72°
46°
2
74°
44°
3
80°
49°
4
85°
46°
5
84°
45°
6
89°
46°
7
91°
53°
8
82°
49°
9
79°
46°
10
80°
49°
11
85°
50°
12
86°
51°
13
88°
54°
14
90°
53°
15
91°
57°
16
86°
51°
17
79°
54°
18
83°
55°
19
88°
56°
20
89°
57°
21
89°
57°
22
90°
56°
23
90°
57°
24
82°
56°
25
80°
56°
26
81°
54°
27
81°
56°
28
86°
55°
29
86°
56°
30
87°
57°
31
87°
56°
1
90°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Diamond Lake
Diamond Lake's July 2026 forecast shows daily high temperatures ranging from 79° to 91°, with overnight lows between 45° and 57°. The average high for July is 85° with an average low of 53°. 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 Diamond Lake. See also: August | September | October.