Hourly Weather Forecast - McHenry, IL

12 AM
42°F
30%
2mph
N
30% Chance of Light Rain
Humidity
98%
Feels like
42°F
Dew Point
41°F
1 AM
42°F
20%
2mph
NNE
Cloudy
Humidity
97%
Feels like
42°F
Dew Point
41°F
2 AM
42°F
10%
3mph
NE
Cloudy
Humidity
97%
Feels like
42°F
Dew Point
41°F
3 AM
42°F
10%
3mph
NE
Cloudy
Humidity
97%
Feels like
42°F
Dew Point
41°F
4 AM
42°F
10%
3mph
ENE
Cloudy
Humidity
97%
Feels like
41°F
Dew Point
41°F
5 AM
42°F
10%
3mph
ENE
Foggy
Humidity
100%
Feels like
40°F
Dew Point
42°F
6 AM
41°F
10%
4mph
E
Foggy
Humidity
100%
Feels like
39°F
Dew Point
41°F
7 AM
42°F
10%
4mph
E
Foggy
Humidity
100%
Feels like
39°F
Dew Point
42°F
7:20 AM
8 AM
44°F
10%
5mph
ESE
Foggy
Humidity
99%
Feels like
41°F
Dew Point
43°F
9 AM
46°F
10%
5mph
SE
Cloudy
Humidity
95%
Feels like
43°F
Dew Point
44°F
10 AM
47°F
10%
6mph
SE
Cloudy
Humidity
93%
Feels like
45°F
Dew Point
45°F
11 AM
48°F
10%
6mph
SSE
Cloudy
Humidity
92%
Feels like
45°F
Dew Point
46°F
12 PM
49°F
10%
7mph
S
Cloudy
Humidity
91%
Feels like
46°F
Dew Point
47°F
1 PM
49°F
10%
7mph
S
Cloudy
Humidity
90%
Feels like
46°F
Dew Point
46°F
2 PM
49°F
10%
7mph
S
Cloudy
Humidity
89%
Feels like
46°F
Dew Point
46°F
3 PM
48°F
10%
7mph
SSW
Cloudy
Humidity
91%
Feels like
45°F
Dew Point
46°F
4 PM
47°F
10%
7mph
SSW
Cloudy
Humidity
95%
Feels like
44°F
Dew Point
46°F
4:25 PM
5 PM
47°F
10%
6mph
SSW
Cloudy
Humidity
96%
Feels like
44°F
Dew Point
46°F
6 PM
48°F
10%
6mph
SW
Cloudy
Humidity
95%
Feels like
45°F
Dew Point
46°F
7 PM
49°F
10%
6mph
SW
Cloudy
Humidity
94%
Feels like
46°F
Dew Point
47°F
8 PM
49°F
10%
6mph
WSW
Cloudy
Humidity
95%
Feels like
47°F
Dew Point
48°F
9 PM
50°F
10%
7mph
WSW
Cloudy
Humidity
94%
Feels like
47°F
Dew Point
48°F
10 PM
50°F
10%
7mph
W
Cloudy
Humidity
94%
Feels like
47°F
Dew Point
48°F
11 PM
49°F
10%
7mph
W
Cloudy
Humidity
94%
Feels like
46°F
Dew Point
48°F

Rain And Snow Totals Through Monday

Atmospheric River Takes Aim For Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California later today into Monday bringing heavy rainfall and mountain snow.

NOAA, NCDC

White Christmas? What Are The Odds

Sunday's Weather Outlook

Sunday's Weather Outlook

Cold weather

During Extreme Cold: Watch for Frostbite!

Flu Update Valid For Week Ending December 13, 2025

Weekly Flu Update: Flu Spreading Hard Across U.S.

Watch vs. Warning

Flash Flood Watch and Warning Defined

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