Hourly Weather Forecast - Mount Vernon, IL

12 AM
49°F
10%
7mph
SSW
Partly Cloudy
Humidity
84%
Feels like
46°F
Dew Point
45°F
1 AM
48°F
10%
6mph
S
Mostly Cloudy
Humidity
87%
Feels like
45°F
Dew Point
45°F
2 AM
47°F
0%
6mph
S
Mostly Cloudy
Humidity
89%
Feels like
44°F
Dew Point
44°F
3 AM
47°F
0%
6mph
S
Mostly Cloudy
Humidity
91%
Feels like
44°F
Dew Point
45°F
4 AM
47°F
0%
6mph
S
Mostly Cloudy
Humidity
92%
Feels like
44°F
Dew Point
45°F

Rain And Snow Totals Through Monday

Atmospheric River Impacts Northern California

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

NOAA, NCDC

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Today's Weather Outlook

Today'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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