S
M
T
W
T
F
S
26
77°
58°
27
76°
62°
28
86°
63°
29
85°
62°
30
86°
63°
31
86°
64°
1
86°
62°
2
86°
61°
3
88°
63°
4
Hist. Avg.
81°
57°
5
Hist. Avg.
81°
57°
6
Hist. Avg.
81°
57°
7
Hist. Avg.
80°
57°
8
Hist. Avg.
80°
56°
9
Hist. Avg.
80°
56°
10
Hist. Avg.
80°
56°
11
Hist. Avg.
80°
56°
12
Hist. Avg.
80°
56°
13
Hist. Avg.
80°
56°
14
Hist. Avg.
80°
55°
15
Hist. Avg.
79°
55°
16
Hist. Avg.
79°
55°
17
Hist. Avg.
79°
55°
18
Hist. Avg.
79°
54°
19
Hist. Avg.
78°
54°
20
Hist. Avg.
78°
54°
21
Hist. Avg.
78°
54°
22
Hist. Avg.
78°
53°
23
Hist. Avg.
78°
53°
24
Hist. Avg.
77°
53°
25
Hist. Avg.
77°
52°
26
Hist. Avg.
77°
52°
27
Hist. Avg.
76°
52°
28
Hist. Avg.
76°
52°
29
Hist. Avg.
76°
51°
30
Hist. Avg.
75°
51°
31
Hist. Avg.
75°
50°
1
Hist. Avg.
74°
50°
2
Hist. Avg.
74°
50°
3
Hist. Avg.
74°
49°
4
Hist. Avg.
73°
49°
5
Hist. Avg.
73°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in McHenry
McHenry's August 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 58° and 64°. The average high for August is 84° with an average low of 62°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in McHenry. See also: September | October | November.
