S
M
T
W
T
F
S
26
57°
28°
27
49°
35°
28
48°
28°
29
48°
32°
30
46°
30°
1
59°
27°
2
72°
43°
3
73°
34°
4
50°
34°
5
39°
32°
6
50°
32°
7
63°
28°
8
68°
36°
9
59°
34°
10
59°
28°
11
75°
37°
12
73°
48°
13
79°
43°
14
79°
59°
15
77°
50°
16
57°
41°
17
46°
41°
18
45°
39°
19
52°
37°
20
68°
34°
21
70°
45°
22
64°
48°
23
66°
46°
24
82°
45°
25
90°
57°
26
93°
59°
27
91°
64°
28
91°
61°
29
81°
63°
30
79°
63°
31
73°
61°
1
77°
59°
2
86°
59°
3
77°
61°
4
79°
54°
5
77°
61°
6
90°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in McHenry
McHenry's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in McHenry. See also: June | July | August.
