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.

Overcast

63°F

17°C

Humidity 94%
Wind Speed S 9 mph
Barometer 29.73 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 16 Apr 4:38 am CDT
Extended Forecast for

Mark IL

  • Today

    Today: Mostly cloudy through mid morning, then gradual clearing, with a high near 75. Southwest wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph.

    High: 75 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Clear, with a low around 56. West wind around 5 mph becoming east in the evening.

    Low: 56 °F

    Clear

  • Friday

    Friday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 83. Breezy, with a southeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    High: 83 °F

    Mostly Sunny
    then Chance
    T-storms and
    Breezy

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 4am, then showers likely. Low around 45. South wind around 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 45 °F

    Showers

  • Saturday

    Saturday: A 30 percent chance of showers before 1pm. Mostly sunny, with a high near 52.

    High: 52 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy through mid morning, then gradual clearing, with a high near 75. Southwest wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph.
Tonight
Clear, with a low around 56. West wind around 5 mph becoming east in the evening.
Friday
A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 83. Breezy, with a southeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Friday Night
Showers and possibly a thunderstorm before 4am, then showers likely. Low around 45. South wind around 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
A 30 percent chance of showers before 1pm. Mostly sunny, with a high near 52.
Saturday Night
Mostly clear, with a low around 35.
Sunday
Sunny, with a high near 54.
Sunday Night
Partly cloudy, with a low around 35.
Monday
Sunny, with a high near 62.
Monday Night
Mostly clear, with a low around 49.
Tuesday
Mostly sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 52.
Wednesday
Mostly sunny, with a high near 72.
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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:
4:46 am CDT Apr 16, 2026
Forecast Valid:
4am CDT Apr 16, 2026-6pm CDT Apr 22, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation