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

45°F

7°C

Humidity 87%
Wind Speed S 5 mph
Barometer 29.93 in
Dewpoint 41°F (5°C)
Visibility 7.00 mi
Wind Chill42°F (6°C)
Last update 21 Mar 6:37 am CDT
Extended Forecast for

Mark IL

  • Today

    Today: Sunny, with a high near 82. East wind 5 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 52. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 52 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of rain after 1pm. Increasing clouds, with a temperature falling to around 49 by 5pm. Breezy, with a southwest wind 15 to 20 mph becoming northeast in the morning. Winds could gust as high as 30 mph.

    High: 54 °F⇓

    Partly Sunny
    then Slight
    Chance Rain
    and Breezy

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 31. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 31 °F

    Decreasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 61.

    High: 61 °F

    Mostly Cloudy

Detailed Forecast

Today
Sunny, with a high near 82. East wind 5 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph.
Tonight
Mostly clear, with a low around 52. South wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
A 20 percent chance of rain after 1pm. Increasing clouds, with a temperature falling to around 49 by 5pm. Breezy, with a southwest wind 15 to 20 mph becoming northeast in the morning. Winds could gust as high as 30 mph.
Sunday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 31. North wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 50.
Monday Night
Mostly cloudy, with a low around 34.
Tuesday
Partly sunny, with a high near 59.
Tuesday Night
Mostly cloudy, with a low around 40.
Wednesday
Mostly cloudy, with a high near 61.
Wednesday Night
Mostly cloudy, with a low around 49.
Thursday
A 30 percent chance of rain. Partly sunny, with a high near 68.
Thursday Night
Mostly cloudy, with a low around 34.
Friday
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:
2:26 am CDT Mar 21, 2026
Forecast Valid:
6am CDT Mar 21, 2026-6pm CDT Mar 27, 2026
 
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