Hourly Weather Forecast - McHenry, IL

5 AM
25°F
10%
14mph
SSW
Mostly Cloudy
Humidity
89%
Feels like
13°F
Dew Point
22°F
6 AM
26°F
0%
14mph
SW
Cloudy
Humidity
90%
Feels like
14°F
Dew Point
24°F
7 AM
28°F
0%
14mph
SW
Cloudy
Humidity
90%
Feels like
17°F
Dew Point
25°F
7:10 AM
8 AM
30°F
0%
13mph
SW
Cloudy
Humidity
90%
Feels like
19°F
Dew Point
27°F
9 AM
31°F
0%
13mph
WSW
Cloudy
Humidity
90%
Feels like
21°F
Dew Point
28°F
10 AM
32°F
0%
13mph
WSW
Cloudy
Humidity
88%
Feels like
23°F
Dew Point
29°F
11 AM
33°F
0%
12mph
WSW
Cloudy
Humidity
87%
Feels like
24°F
Dew Point
29°F
12 PM
33°F
0%
11mph
WSW
Cloudy
Humidity
85%
Feels like
25°F
Dew Point
29°F
1 PM
33°F
0%
11mph
WSW
Cloudy
Humidity
86%
Feels like
25°F
Dew Point
30°F
2 PM
33°F
10%
10mph
WSW
Mostly Cloudy
Humidity
87%
Feels like
25°F
Dew Point
30°F
3 PM
33°F
10%
10mph
SW
Cloudy
Humidity
90%
Feels like
25°F
Dew Point
31°F
4 PM
33°F
20%
9mph
SW
Cloudy
Humidity
91%
Feels like
26°F
Dew Point
31°F
4:20 PM
5 PM
34°F
30%
8mph
SSW
30% Chance of Flurries
Humidity
92%
Feels like
27°F
Dew Point
32°F
6 PM
35°F
40%
9mph
SSW
40% Chance Frozen Mix
Humidity
93%
Feels like
28°F
Dew Point
33°F
7 PM
35°F
50%
11mph
S
50% Chance Frozen Mix
Humidity
92%
Feels like
28°F
Dew Point
33°F
8 PM
35°F
60%
13mph
S
60% Chance of Rain
Humidity
93%
Feels like
27°F
Dew Point
34°F
9 PM
36°F
70%
14mph
SSW
70% Chance of Rain
Humidity
94%
Feels like
27°F
Dew Point
34°F
10 PM
37°F
60%
14mph
SSW
60% Chance of Light Rain
Humidity
93%
Feels like
28°F
Dew Point
35°F
11 PM
37°F
50%
15mph
SW
50% Chance of Light Rain
Humidity
92%
Feels like
28°F
Dew Point
35°F

Snow and ice forecast through Thursday A.M.

Snow Barrels Across the Northern U.S.

Low pressure will produce a swath of snow from Minnesota to Maine into Thursday.

Rainfall Forecast for Northwest through Thursday

Heavy, Flooding Rain Impacts the Northwest

Today's Weather Outlook

Today's Weather Outlook

Weekly Drought Map for December 4, 2025

Active Week of Weather Leads to Mixed Drought Results

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

Cold Air Damming - Cause And Effects

People skating on a frozen pond on a clear day. (Image by Q K from Pixabay)

Safety Tips For Icy Surfaces

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

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Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide