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

28°F

-2°C

Humidity 77%
Wind Speed NW 3 mph
Barometer 30.66 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 28 Mar 7:35 am CDT
Extended Forecast for

Mark IL

  • Today

    Today: Sunny, with a high near 50. Light and variable wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 25 mph.

    High: 50 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 39. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 63. South wind around 15 mph, with gusts as high as 25 mph.

    High: 63 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 51. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 51 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 40 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 64. Breezy.

    Low: 64 °F

    Chance
    T-storms and
    Breezy

  • Tuesday

    Tuesday: A chance of rain, then rain likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 78. Breezy. Chance of precipitation is 70%.

    High: 78 °F

    Breezy.
    Chance Rain
    then Rain
    Likely

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 1am. Mostly cloudy, with a low around 40. Chance of precipitation is 70%.

    Low: 40 °F

    Rain Likely

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 51.

    High: 51 °F

    Mostly Cloudy

Detailed Forecast

Today
Sunny, with a high near 50. Light and variable wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 25 mph.
Tonight
Partly cloudy, with a low around 39. South wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday
Mostly sunny, with a high near 63. South wind around 15 mph, with gusts as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 51. South wind around 10 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 79.
Monday Night
A 40 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 64. Breezy.
Tuesday
A chance of rain, then rain likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 78. Breezy. Chance of precipitation is 70%.
Tuesday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 40. Chance of precipitation is 70%.
Wednesday
Mostly cloudy, with a high near 51.
Wednesday Night
Partly cloudy, with a low around 33.
Thursday
A 40 percent chance of rain. Partly sunny, with a high near 50.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 38.
Friday
A 30 percent chance of rain. Partly sunny, with a high near 62.
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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:
5:47 am CDT Mar 28, 2026
Forecast Valid:
7am CDT Mar 28, 2026-6pm CDT Apr 3, 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