S
M
T
W
T
F
S
28
81°
60°
29
91°
75°
30
92°
76°
1
91°
72°
2
92°
71°
3
87°
69°
4
83°
67°
5
84°
66°
6
80°
62°
7
85°
68°
8
85°
65°
9
84°
64°
10
84°
66°
11
87°
64°
12
86°
64°
13
87°
65°
14
84°
62°
15
80°
60°
16
82°
64°
17
78°
59°
18
79°
65°
19
79°
66°
20
81°
66°
21
84°
65°
22
86°
67°
23
87°
67°
24
83°
66°
25
86°
67°
26
87°
68°
27
88°
68°
28
87°
67°
29
88°
67°
30
87°
68°
31
86°
66°
1
80°
63°
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 78° to 92°, with overnight lows between 59° and 72°. The average high for July is 85° with an average low of 66°. 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.
