Hourly Weather Forecast - McHenry, IL

12 AM
22°F
0%
14mph
WNW
Clear
Humidity
59%
Feels like
10°F
Dew Point
10°F
1 AM
21°F
0%
12mph
WNW
Clear
Humidity
59%
Feels like
9°F
Dew Point
9°F
2 AM
19°F
0%
11mph
WNW
Clear
Humidity
60%
Feels like
7°F
Dew Point
7°F
3 AM
17°F
0%
9mph
WNW
Clear
Humidity
62%
Feels like
6°F
Dew Point
7°F
4 AM
16°F
0%
8mph
NW
Clear
Humidity
64%
Feels like
5°F
Dew Point
6°F
5 AM
15°F
0%
6mph
NW
Clear
Humidity
66%
Feels like
5°F
Dew Point
5°F
6 AM
14°F
0%
5mph
NW
Clear
Humidity
67%
Feels like
6°F
Dew Point
6°F
7 AM
15°F
0%
4mph
NW
Clear
Humidity
64%
Feels like
8°F
Dew Point
6°F
7:18 AM
8 AM
17°F
0%
4mph
WNW
Sunny
Humidity
62%
Feels like
11°F
Dew Point
6°F
9 AM
19°F
0%
3mph
WNW
Sunny
Humidity
58%
Feels like
14°F
Dew Point
7°F
10 AM
21°F
0%
3mph
W
Sunny
Humidity
54%
Feels like
21°F
Dew Point
8°F
11 AM
24°F
0%
4mph
WSW
Sunny
Humidity
51%
Feels like
19°F
Dew Point
9°F
12 PM
26°F
0%
4mph
WSW
Sunny
Humidity
49%
Feels like
21°F
Dew Point
10°F
1 PM
28°F
0%
5mph
WSW
Sunny
Humidity
49%
Feels like
22°F
Dew Point
11°F
2 PM
28°F
0%
5mph
SW
Sunny
Humidity
49%
Feels like
22°F
Dew Point
11°F
3 PM
28°F
0%
5mph
SW
Sunny
Humidity
51%
Feels like
22°F
Dew Point
12°F
4 PM
27°F
0%
4mph
SW
Sunny
Humidity
55%
Feels like
21°F
Dew Point
13°F
4:23 PM
5 PM
25°F
0%
4mph
SSW
Clear
Humidity
58%
Feels like
20°F
Dew Point
13°F
6 PM
24°F
0%
4mph
SSW
Mostly Clear
Humidity
60%
Feels like
19°F
Dew Point
13°F
7 PM
24°F
0%
4mph
S
Partly Cloudy
Humidity
65%
Feels like
18°F
Dew Point
14°F
8 PM
24°F
0%
5mph
S
Partly Cloudy
Humidity
66%
Feels like
18°F
Dew Point
14°F
9 PM
24°F
0%
5mph
S
Mostly Cloudy
Humidity
63%
Feels like
17°F
Dew Point
13°F
10 PM
24°F
0%
6mph
SSW
Mostly Cloudy
Humidity
63%
Feels like
17°F
Dew Point
13°F
11 PM
25°F
10%
6mph
SSW
Cloudy
Humidity
63%
Feels like
18°F
Dew Point
15°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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