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

Hazardous Weather Conditions

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fair

13°F

-11°C

Humidity 66%
Wind Speed W 12 mph
Barometer 30.21 in
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Wind Chill-1°F (-18°C)
Last update 17 Mar 9:35 am CDT
Extended Forecast for

Mark IL

  • Today

    Today: Increasing clouds, with a high near 24. Wind chill values as low as zero. Northwest wind 5 to 10 mph becoming southwest in the afternoon.

    High: 24 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Snow, mainly after 8pm. Temperature falling to near 21 by 8pm, then rising to around 27 during the remainder of the night. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

    Low: 21 °F⇑

    Snow

  • Wednesday

    Wednesday: A 10 percent chance of snow before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 43. South wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph.

    High: 43 °F

    Slight Chance
    Snow then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 32. West wind around 5 mph becoming south after midnight.

    Low: 32 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 63.

    High: 63 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 24. Wind chill values as low as zero. Northwest wind 5 to 10 mph becoming southwest in the afternoon.
Tonight
Snow, mainly after 8pm. Temperature falling to near 21 by 8pm, then rising to around 27 during the remainder of the night. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.
Wednesday
A 10 percent chance of snow before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 43. South wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around 32. West wind around 5 mph becoming south after midnight.
Thursday
Mostly sunny, with a high near 58.
Thursday Night
Mostly cloudy, with a low around 38.
Friday
Partly sunny, with a high near 63.
Friday Night
Mostly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 68.
Saturday Night
Partly cloudy, with a low around 45.
Sunday
Partly sunny, with a high near 62.
Sunday Night
Mostly cloudy, with a low around 32.
Monday
Partly sunny, with a high near 49.
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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:
8:37 am CDT Mar 17, 2026
Forecast Valid:
9am CDT Mar 17, 2026-6pm CDT Mar 23, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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