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

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Mostly Cloudy

22°F

-6°C

Humidity 87%
Wind Speed S 14 mph
Barometer 30.01 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill9°F (-13°C)
Last update 3 Dec 12:15 am CST
Extended Forecast for

Mark IL

  • Overnight

    Overnight: Mostly cloudy, with a temperature rising to around 23 by 5am. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 20 °F⇑

    Mostly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of snow, mainly between 10am and 4pm. Cloudy, with a high near 33. Southwest wind around 10 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 33 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around -1. Wind chill values as low as -15. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: -1 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 11. Wind chill values as low as -15. Northwest wind around 5 mph becoming calm in the morning.

    High: 11 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around -4.

    Low: -4 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 25.

    High: 25 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 26.

    High: 26 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 15.

    Low: 15 °F

    Chance Snow

Detailed Forecast

Overnight
Mostly cloudy, with a temperature rising to around 23 by 5am. South wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday
A 40 percent chance of snow, mainly between 10am and 4pm. Cloudy, with a high near 33. Southwest wind around 10 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around -1. Wind chill values as low as -15. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 11. Wind chill values as low as -15. Northwest wind around 5 mph becoming calm in the morning.
Thursday Night
Mostly clear, with a low around -4.
Friday
Partly sunny, with a high near 25.
Friday Night
Mostly cloudy, with a low around 15.
Saturday
Mostly cloudy, with a high near 26.
Saturday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 15.
Sunday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 24.
Sunday Night
Mostly cloudy, with a low around 6.
Monday
Partly sunny, with a high near 25.
Monday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 15.
Tuesday
Mostly cloudy, with a high near 31.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mark IL
 41.26°N 89.26°W (Elev. 699 ft)
Last Update:
9:21 pm CST Dec 2, 2025
Forecast Valid:
12am CST Dec 3, 2025-6pm CST Dec 9, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation