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.

Mostly Cloudy

62°F

17°C

Humidity 94%
Wind Speed Calm
Barometer 29.81 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 15 Apr 7:15 am CDT
Extended Forecast for

Mark IL

  • Today

    Today: Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms likely, mainly between 1pm and 5pm. High near 75. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 75 °F

    Showers then
    T-storms
    Likely

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 11pm. Mostly cloudy, with a low around 61. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 61 °F

    T-storms
    Likely

  • Thursday

    Thursday: A chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Mostly sunny, with a high near 74. West wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

    High: 74 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55. West wind around 5 mph becoming south after midnight.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 82.

    High: 82 °F

    Partly Sunny

  • Friday Night

    Friday Night: Showers, with thunderstorms also possible after 7pm. Low around 49. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 49 °F

    Showers

  • Saturday

    Saturday: A 30 percent chance of showers. Partly sunny, with a high near 62. Breezy.

    High: 62 °F

    Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

Detailed Forecast

Today
Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms likely, mainly between 1pm and 5pm. High near 75. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and thunderstorms likely, mainly before 11pm. Mostly cloudy, with a low around 61. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Mostly sunny, with a high near 74. West wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Thursday Night
Mostly clear, with a low around 55. West wind around 5 mph becoming south after midnight.
Friday
Partly sunny, with a high near 82.
Friday Night
Showers, with thunderstorms also possible after 7pm. Low around 49. 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. Partly sunny, with a high near 62. Breezy.
Saturday Night
Partly cloudy, with a low around 36.
Sunday
Sunny, with a high near 53.
Sunday Night
Mostly clear, with a low around 36.
Monday
Sunny, with a high near 64.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Sunny, with a high near 72.
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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:
5:21 am CDT Apr 15, 2026
Forecast Valid:
7am CDT Apr 15, 2026-6pm CDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation