Hourly Weather Forecast - McHenry, IL

9 AM
30°F
0%
13mph
WSW
Cloudy
Humidity
85%
Feels like
20°F
Dew Point
26°F
10 AM
31°F
0%
13mph
WSW
Cloudy
Humidity
84%
Feels like
22°F
Dew Point
27°F
11 AM
32°F
0%
12mph
WSW
Cloudy
Humidity
84%
Feels like
23°F
Dew Point
28°F
12 PM
33°F
0%
12mph
WSW
Cloudy
Humidity
84%
Feels like
24°F
Dew Point
28°F
1 PM
33°F
0%
11mph
WSW
Cloudy
Humidity
84%
Feels like
25°F
Dew Point
29°F
2 PM
33°F
10%
10mph
WSW
Cloudy
Humidity
85%
Feels like
25°F
Dew Point
29°F
3 PM
33°F
10%
9mph
SW
Cloudy
Humidity
88%
Feels like
25°F
Dew Point
30°F
4 PM
33°F
20%
9mph
SW
Cloudy
Humidity
90%
Feels like
26°F
Dew Point
31°F
4:20 PM
5 PM
34°F
30%
8mph
SSW
30% Chance of Flurries
Humidity
90%
Feels like
27°F
Dew Point
31°F
6 PM
35°F
50%
9mph
SSW
50% Chance Frozen Mix
Humidity
91%
Feels like
28°F
Dew Point
32°F
7 PM
35°F
60%
10mph
S
60% Chance Frozen Mix
Humidity
90%
Feels like
28°F
Dew Point
33°F
8 PM
36°F
70%
13mph
SSW
70% Chance of Light Rain
Humidity
92%
Feels like
27°F
Dew Point
34°F
9 PM
36°F
60%
14mph
SSW
60% Chance of Light Rain
Humidity
93%
Feels like
27°F
Dew Point
34°F
10 PM
37°F
60%
15mph
SSW
60% Chance of Light Rain
Humidity
91%
Feels like
28°F
Dew Point
35°F
11 PM
38°F
50%
16mph
SW
50% Chance of Light Rain
Humidity
90%
Feels like
29°F
Dew Point
35°F

Rainfall Forecast for Northwest through Thursday

Heavy Rain, Flooding Soaks The Northwest

A fast-moving series of atmospheric rivers continue to drench the Pacific Northwest today through Thursday.

Snow and ice forecast through Thursday A.M.

Snow Barrels Across the Northern U.S.

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

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide