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

62°F

17°C

Humidity 49%
Wind Speed S 15 mph
Barometer 30.00 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 8 Apr 8:55 pm CDT
Extended Forecast for

Mark IL

  • Tonight

    Tonight: A chance of showers before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Increasing clouds, with a low around 54. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.

    Low: 54 °F

    Breezy.
    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers before 7am, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 70. West wind 5 to 10 mph. Chance of precipitation is 10%.

    High: 70 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 48. Northwest wind 5 to 10 mph becoming east after midnight. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 48 °F

    Showers

  • Friday

    Friday: A 50 percent chance of showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 60. North wind around 10 mph.

    High: 60 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Saturday

    Saturday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 40 percent chance of showers after 1pm. Mostly cloudy, with a high near 76. Breezy.

    High: 76 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Breezy. Chance of precipitation is 60%.

    Low: 64 °F

    Showers
    Likely and
    Breezy

Detailed Forecast

Tonight
A chance of showers before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Increasing clouds, with a low around 54. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.
Thursday
A slight chance of showers before 7am, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 70. West wind 5 to 10 mph. Chance of precipitation is 10%.
Thursday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 48. Northwest wind 5 to 10 mph becoming east after midnight. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Friday
A 50 percent chance of showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 60. North wind around 10 mph.
Friday Night
Mostly clear, with a low around 38.
Saturday
Partly sunny, with a high near 62.
Saturday Night
Mostly cloudy, with a low around 55.
Sunday
A 40 percent chance of showers after 1pm. Mostly cloudy, with a high near 76. Breezy.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Breezy. Chance of precipitation is 60%.
Monday
A 40 percent chance of showers. Partly sunny, with a high near 80. Breezy.
Monday Night
Showers likely. Mostly cloudy, with a low around 64. Chance of precipitation is 70%.
Tuesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 76. Chance of precipitation is 70%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 48. Chance of precipitation is 60%.
Wednesday
A 40 percent chance of showers. Partly sunny, with a high near 60.
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ABOUT THIS FORECAST

 
Point Forecast:
Mark IL
 41.26°N 89.26°W (Elev. 699 ft)
Last Update:
5:42 pm CDT Apr 8, 2026
Forecast Valid:
9pm CDT Apr 8, 2026-6pm CDT Apr 15, 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