S
M
T
W
T
F
S
29
88°
54°
30
83°
53°
31
67°
55°
1
71°
53°
2
67°
52°
3
74°
47°
4
81°
45°
5
86°
50°
6
84°
55°
7
78°
51°
8
84°
55°
9
77°
53°
10
71°
54°
11
66°
48°
12
62°
48°
13
68°
45°
14
72°
49°
15
73°
52°
16
73°
51°
17
72°
51°
18
71°
50°
19
73°
50°
20
75°
50°
21
72°
46°
22
72°
51°
23
70°
52°
24
70°
53°
25
71°
51°
26
72°
51°
27
76°
52°
28
78°
53°
29
75°
52°
30
80°
53°
1
81°
54°
2
79°
53°
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 62° to 84°, with overnight lows between 45° and 55°. The average high for April is 74° with an average low of 51°. 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.