Hourly Weather Forecast - Crystal Lake, IL

12 AM
42°F
40%
1mph
N
40% Chance of Light Rain
Humidity
96%
Feels like
42°F
Dew Point
40°F
1 AM
41°F
20%
0mph
NNE
Cloudy
Humidity
96%
Feels like
41°F
Dew Point
40°F
2 AM
41°F
10%
0mph
NE
Cloudy
Humidity
97%
Feels like
41°F
Dew Point
40°F
3 AM
40°F
10%
0mph
ENE
Cloudy
Humidity
98%
Feels like
40°F
Dew Point
40°F
4 AM
40°F
10%
0mph
ENE
Foggy
Humidity
99%
Feels like
40°F
Dew Point
40°F
5 AM
40°F
10%
1mph
E
Foggy
Humidity
100%
Feels like
40°F
Dew Point
40°F
6 AM
40°F
10%
1mph
E
Foggy
Humidity
100%
Feels like
40°F
Dew Point
40°F
7 AM
40°F
10%
1mph
ESE
Foggy
Humidity
100%
Feels like
40°F
Dew Point
40°F
7:20 AM
8 AM
42°F
10%
2mph
ESE
Foggy
Humidity
99%
Feels like
42°F
Dew Point
41°F
9 AM
43°F
10%
2mph
SE
Cloudy
Humidity
96%
Feels like
43°F
Dew Point
42°F
10 AM
44°F
10%
2mph
SSE
Cloudy
Humidity
96%
Feels like
44°F
Dew Point
43°F
11 AM
46°F
10%
2mph
SSE
Cloudy
Humidity
95%
Feels like
46°F
Dew Point
44°F
12 PM
47°F
10%
2mph
S
Cloudy
Humidity
95%
Feels like
47°F
Dew Point
45°F
1 PM
47°F
10%
2mph
S
Cloudy
Humidity
93%
Feels like
47°F
Dew Point
46°F
2 PM
48°F
10%
2mph
SSW
Cloudy
Humidity
94%
Feels like
48°F
Dew Point
46°F
3 PM
48°F
10%
2mph
SSW
Cloudy
Humidity
96%
Feels like
48°F
Dew Point
47°F
4 PM
48°F
10%
2mph
SSW
Cloudy
Humidity
97%
Feels like
48°F
Dew Point
47°F
4:26 PM
5 PM
48°F
10%
2mph
SW
Cloudy
Humidity
97%
Feels like
48°F
Dew Point
48°F
6 PM
49°F
20%
2mph
SW
Cloudy
Humidity
93%
Feels like
49°F
Dew Point
47°F
7 PM
50°F
20%
2mph
SW
Cloudy
Humidity
93%
Feels like
50°F
Dew Point
48°F
8 PM
51°F
20%
3mph
WSW
Cloudy
Humidity
94%
Feels like
51°F
Dew Point
49°F
9 PM
50°F
20%
3mph
WSW
Cloudy
Humidity
94%
Feels like
50°F
Dew Point
49°F
10 PM
50°F
10%
4mph
W
Cloudy
Humidity
95%
Feels like
48°F
Dew Point
48°F
11 PM
49°F
10%
5mph
W
Cloudy
Humidity
94%
Feels like
47°F
Dew Point
47°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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