S
M
T
W
T
F
S
28
94°
62°
29
90°
61°
30
87°
59°
1
90°
62°
2
93°
63°
3
95°
63°
4
93°
62°
5
89°
59°
6
91°
61°
7
90°
62°
8
90°
62°
9
91°
63°
10
94°
62°
11
94°
62°
12
97°
65°
13
98°
65°
14
97°
64°
15
94°
63°
16
93°
61°
17
94°
62°
18
97°
64°
19
98°
65°
20
94°
60°
21
94°
62°
22
95°
66°
23
98°
65°
24
99°
65°
25
98°
64°
26
100°
66°
27
100°
65°
28
99°
64°
29
99°
61°
30
96°
60°
31
93°
60°
1
92°
61°
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 87° to 100°, with overnight lows between 59° and 66°. The average high for July is 94° with an average low of 63°. 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.