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

Prolonged Extreme Cold; Eastern U.S. Winter Storm

Another Arctic blast will surge south across the northern Plains Thursday night, crossing the Midwest and reaching the Gulf Coast Friday night. Confidence continues to increase for significant heavy snow across much of the Southern Appalachians, Carolinas, and southern Mid-Atlantic Friday into Sunday. Read More >

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fair

7°F

-14°C

Humidity 72%
Wind Speed N 3 mph
Barometer 30.30 in
Dewpoint 0°F (-18°C)
Visibility 10.00 mi
Last update 29 Jan 2:20 am CST
Extended Forecast for

Mark IL

  • Overnight

    Overnight: Partly cloudy, with a low around 1. Wind chill values as low as -10. North wind around 5 mph.

    Low: 1 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 16. Wind chill values as low as -10. North wind around 5 mph.

    High: 16 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming clear, with a low around 0. Wind chill values as low as -10. North wind around 5 mph.

    Low: 0 °F

    Decreasing
    Clouds

  • Friday

    Friday: Mostly sunny, with a high near 17. Wind chill values as low as -10. North wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 17 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 5.

    Low: 5 °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 7.

    Low: 7 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 26.

    High: 26 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 16.

    Low: 16 °F

    Chance Snow
    then Mostly
    Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 1. Wind chill values as low as -10. North wind around 5 mph.
Thursday
Partly sunny, with a high near 16. Wind chill values as low as -10. North wind around 5 mph.
Thursday Night
Mostly cloudy, then gradually becoming clear, with a low around 0. Wind chill values as low as -10. North wind around 5 mph.
Friday
Mostly sunny, with a high near 17. Wind chill values as low as -10. North wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 5.
Saturday
Mostly sunny, with a high near 22.
Saturday Night
Partly cloudy, with a low around 7.
Sunday
Mostly sunny, with a high near 26.
Sunday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 16.
Monday
Mostly cloudy, with a high near 32.
Monday Night
Mostly cloudy, with a low around 18.
Tuesday
Partly sunny, with a high near 32.
Tuesday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 22.
Wednesday
A 30 percent chance of snow. Mostly cloudy, with a high near 32.
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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:
10:17 pm CST Jan 28, 2026
Forecast Valid:
2am CST Jan 29, 2026-6pm CST Feb 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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