S
M
T
W
T
F
S
29
72°
56°
30
76°
61°
31
79°
68°
1
78°
72°
2
81°
66°
3
82°
67°
4
82°
66°
5
72°
51°
6
68°
50°
7
78°
52°
8
77°
56°
9
76°
60°
10
78°
59°
11
79°
59°
12
80°
60°
13
80°
59°
14
81°
61°
15
77°
55°
16
79°
59°
17
79°
60°
18
77°
60°
19
74°
59°
20
76°
60°
21
77°
60°
22
78°
59°
23
79°
60°
24
78°
60°
25
78°
61°
26
80°
61°
27
81°
59°
28
77°
59°
29
80°
62°
30
77°
58°
1
76°
58°
2
77°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in McHenry
McHenry's April 2026 forecast shows daily high temperatures ranging from 68° to 82°, with overnight lows between 50° and 67°. The average high for April is 78° with an average low of 59°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in McHenry. See also: May | June | July.