S
M
T
W
T
F
S
28
62°
45°
29
67°
50°
30
69°
51°
1
69°
53°
2
70°
56°
3
73°
58°
4
75°
59°
5
74°
60°
6
75°
60°
7
76°
58°
8
76°
58°
9
79°
59°
10
79°
62°
11
81°
66°
12
74°
67°
13
78°
64°
14
80°
64°
15
80°
65°
16
79°
63°
17
79°
63°
18
79°
63°
19
81°
64°
20
80°
65°
21
79°
67°
22
75°
60°
23
79°
60°
24
81°
65°
25
79°
62°
26
78°
61°
27
78°
61°
28
79°
61°
29
79°
65°
30
81°
66°
31
84°
67°
1
87°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Crystal Lake
Crystal Lake's July 2026 forecast shows daily high temperatures ranging from 79° to 87°, with overnight lows between 61° and 67°. The average high for July is 82° with an average low of 65°. 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 Crystal Lake. See also: August | September | October.
