S
M
T
W
T
F
S
28
65°
35°
29
70°
32°
30
73°
34°
1
75°
32°
2
81°
36°
3
85°
41°
4
89°
46°
5
86°
51°
6
87°
51°
7
88°
47°
8
88°
47°
9
88°
47°
10
85°
40°
11
83°
47°
12
85°
48°
13
82°
51°
14
86°
48°
15
90°
44°
16
89°
44°
17
85°
45°
18
84°
44°
19
84°
42°
20
83°
43°
21
87°
45°
22
86°
45°
23
84°
40°
24
78°
41°
25
85°
43°
26
86°
44°
27
86°
44°
28
85°
43°
29
86°
44°
30
86°
43°
31
79°
38°
1
80°
42°
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 78° to 90°, with overnight lows between 38° and 51°. The average high for July is 85° with an average low of 44°. 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.