National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Late January Extreme Cold; Watching East Coast Storm Threat This Weekend

The next blast of Arctic air surges south down the Plains, across the Great Lakes and through the Southeast and East Friday through Saturday. This could be longest duration of cold in several decades. Forecast models are being closely monitored for potential of another significant winter storm to impact the eastern United States this coming weekend. Confidence in coastal impacts has increased. Read More >

Hazardous Weather Conditions

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fair

7°F

-14°C

Humidity 66%
Wind Speed NW 9 mph
Barometer 30.33 in
Dewpoint -2°F (-19°C)
Visibility 10.00 mi
Wind Chill-6°F (-21°C)
Last update 27 Jan 9:00 pm CST
Extended Forecast for

Mark IL

  • Tonight

    Tonight: Mostly clear, with a low around 1. Wind chill values as low as -10. West wind around 5 mph.

    Low: 1 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 18. Wind chill values as low as -15. West wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 18 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 1. Wind chill values as low as -10. Northwest wind 5 to 10 mph.

    Low: 1 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Partly sunny, with a high near 15. Wind chill values as low as -10. North wind around 5 mph.

    High: 15 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 0.

    Low: 0 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 15.

    High: 15 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 4.

    Low: 4 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 22.

    High: 22 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 6.

    Low: 6 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 1. Wind chill values as low as -10. West wind around 5 mph.
Wednesday
Mostly sunny, with a high near 18. Wind chill values as low as -15. West wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Increasing clouds, with a low around 1. Wind chill values as low as -10. Northwest wind 5 to 10 mph.
Thursday
Partly sunny, with a high near 15. Wind chill values as low as -10. North wind around 5 mph.
Thursday Night
Mostly clear, with a low around 0.
Friday
Mostly sunny, with a high near 15.
Friday Night
Partly cloudy, with a low around 4.
Saturday
Mostly sunny, with a high near 22.
Saturday Night
Partly cloudy, with a low around 6.
Sunday
Partly sunny, with a high near 25.
Sunday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 15.
Monday
Mostly cloudy, with a high near 29.
Monday Night
Mostly cloudy, with a low around 14.
Tuesday
Partly sunny, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mark IL
 41.26°N 89.26°W (Elev. 699 ft)
Last Update:
8:46 pm CST Jan 27, 2026
Forecast Valid:
9pm CST Jan 27, 2026-6pm CST Feb 3, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation