Hourly Weather Forecast - McHenry, IL

12 AM
25°F
10%
12mph
S
Cloudy
Humidity
66%
Feels like
14°F
Dew Point
15°F
1 AM
26°F
10%
12mph
S
Cloudy
Humidity
66%
Feels like
15°F
Dew Point
16°F
2 AM
27°F
10%
12mph
S
Cloudy
Humidity
66%
Feels like
16°F
Dew Point
17°F
3 AM
28°F
10%
13mph
S
Cloudy
Humidity
67%
Feels like
17°F
Dew Point
18°F
4 AM
28°F
10%
13mph
S
Cloudy
Humidity
67%
Feels like
18°F
Dew Point
19°F
5 AM
29°F
10%
12mph
S
Cloudy
Humidity
69%
Feels like
18°F
Dew Point
20°F
6 AM
28°F
10%
12mph
SSW
Cloudy
Humidity
72%
Feels like
18°F
Dew Point
20°F
7 AM
29°F
10%
12mph
SSW
Mostly Cloudy
Humidity
73%
Feels like
19°F
Dew Point
21°F
7:18 AM
8 AM
30°F
10%
12mph
SSW
Mostly Cloudy
Humidity
72%
Feels like
21°F
Dew Point
22°F
9 AM
33°F
10%
12mph
SSW
Partly Cloudy
Humidity
68%
Feels like
24°F
Dew Point
23°F
10 AM
35°F
10%
12mph
SSW
Partly Cloudy
Humidity
65%
Feels like
27°F
Dew Point
24°F
11 AM
37°F
10%
12mph
SSW
Mostly Cloudy
Humidity
64%
Feels like
29°F
Dew Point
26°F
12 PM
38°F
10%
12mph
SSW
Mostly Cloudy
Humidity
63%
Feels like
31°F
Dew Point
27°F
1 PM
39°F
10%
11mph
SW
Partly Cloudy
Humidity
63%
Feels like
32°F
Dew Point
28°F
2 PM
39°F
10%
11mph
SW
Partly Cloudy
Humidity
65%
Feels like
32°F
Dew Point
28°F
3 PM
39°F
10%
10mph
SW
Partly Cloudy
Humidity
68%
Feels like
32°F
Dew Point
29°F
4 PM
38°F
10%
9mph
SW
Partly Cloudy
Humidity
72%
Feels like
32°F
Dew Point
30°F

Wind chill temperatures Monday A.M.

Cold Weather Chills the Nation Down to the Gulf

Extreme cold paired with their wind chill values will shiver much of the nation.

Snowfall forecast through Monday evening.

Mid-Atlantic, Great Lakes Snow Piles Up

Monday's Weather Outlook

Monday's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

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