Hourly Weather Forecast - McHenry, IL

12 AM
38°F
10%
7mph
SW
Partly Cloudy
Humidity
85%
Feels like
33°F
Dew Point
34°F
1 AM
38°F
10%
7mph
SW
Mostly Cloudy
Humidity
89%
Feels like
33°F
Dew Point
35°F
2 AM
38°F
0%
7mph
SW
Mostly Cloudy
Humidity
91%
Feels like
33°F
Dew Point
36°F
3 AM
38°F
0%
8mph
WSW
Mostly Cloudy
Humidity
95%
Feels like
32°F
Dew Point
36°F
4 AM
37°F
0%
8mph
WSW
Cloudy
Humidity
95%
Feels like
32°F
Dew Point
36°F
5 AM
37°F
0%
8mph
WSW
Cloudy
Humidity
97%
Feels like
31°F
Dew Point
36°F
6 AM
36°F
0%
7mph
W
Cloudy
Humidity
93%
Feels like
30°F
Dew Point
35°F
7 AM
37°F
0%
7mph
W
Cloudy
Humidity
95%
Feels like
31°F
Dew Point
35°F
7:19 AM
8 AM
38°F
0%
7mph
W
Mostly Cloudy
Humidity
93%
Feels like
33°F
Dew Point
36°F
9 AM
39°F
0%
6mph
WNW
Mostly Cloudy
Humidity
90%
Feels like
35°F
Dew Point
37°F
10 AM
41°F
0%
7mph
WNW
Mostly Cloudy
Humidity
84%
Feels like
37°F
Dew Point
37°F
11 AM
43°F
0%
7mph
WNW
Partly Cloudy
Humidity
78%
Feels like
39°F
Dew Point
37°F
12 PM
44°F
0%
7mph
WNW
Partly Cloudy
Humidity
74%
Feels like
40°F
Dew Point
36°F
1 PM
44°F
0%
7mph
WNW
Partly Cloudy
Humidity
71%
Feels like
40°F
Dew Point
35°F
2 PM
43°F
0%
7mph
WNW
Partly Cloudy
Humidity
70%
Feels like
39°F
Dew Point
34°F
3 PM
42°F
0%
6mph
WNW
Partly Cloudy
Humidity
73%
Feels like
38°F
Dew Point
33°F
4 PM
39°F
0%
5mph
WNW
Mostly Sunny
Humidity
78%
Feels like
35°F
Dew Point
33°F
4:24 PM
5 PM
37°F
0%
4mph
WNW
Mostly Clear
Humidity
79%
Feels like
34°F
Dew Point
31°F
6 PM
36°F
0%
4mph
NW
Mostly Clear
Humidity
81%
Feels like
32°F
Dew Point
30°F
7 PM
35°F
0%
4mph
NW
Mostly Clear
Humidity
83%
Feels like
32°F
Dew Point
30°F
8 PM
34°F
0%
3mph
NW
Mostly Clear
Humidity
83%
Feels like
32°F
Dew Point
29°F
9 PM
33°F
0%
3mph
NW
Clear
Humidity
83%
Feels like
33°F
Dew Point
29°F
10 PM
32°F
0%
2mph
NNW
Clear
Humidity
84%
Feels like
32°F
Dew Point
28°F
11 PM
32°F
0%
2mph
N
Clear
Humidity
85%
Feels like
32°F
Dew Point
28°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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