S
M
T
W
T
F
S
28
72°
64°
29
81°
63°
30
84°
66°
1
84°
72°
2
86°
72°
3
86°
73°
4
86°
66°
5
82°
64°
6
79°
64°
7
77°
66°
8
82°
64°
9
77°
64°
10
73°
64°
11
75°
64°
12
79°
63°
13
79°
61°
14
81°
64°
15
84°
68°
16
82°
68°
17
82°
63°
18
76°
68°
19
72°
59°
20
77°
57°
21
73°
63°
22
70°
55°
23
72°
52°
24
72°
55°
25
75°
61°
26
73°
61°
27
77°
63°
28
72°
63°
29
66°
59°
30
72°
55°
31
77°
57°
1
77°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in McHenry
McHenry's July 2026 forecast shows daily high temperatures ranging from 77° to 77°, with overnight lows between 64° and 64°. The average high for July is 77° with an average low of 64°. 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 McHenry. See also: August | September | October.