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

41°F

5°C

Humidity 81%
Wind Speed NE 16 mph
Barometer 30.18 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 1 Apr 12:35 pm CDT
Extended Forecast for

Mark IL

  • This Afternoon

    This Afternoon: A 20 percent chance of showers before 1pm. Cloudy, with a high near 47. Northeast wind around 15 mph, with gusts as high as 30 mph.

    High: 47 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10pm. Low around 42. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 42 °F

    Showers

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 4pm. High near 71. Breezy, with a southeast wind 15 to 20 mph becoming south 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 71 °F

    Breezy.
    Showers then
    T-storms

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm between 10pm and 1am. Partly cloudy, with a low around 49. Breezy, with a south wind 20 to 25 mph becoming west 10 to 15 mph after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 49 °F

    Breezy.
    T-storms
    Likely then
    Showers
    Likely

  • Friday

    Friday: A 40 percent chance of showers after 1pm. Partly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers before 7pm, then showers and possibly a thunderstorm between 7pm and 4am, then showers after 4am. Low around 50. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 50 °F

    Showers

  • Saturday

    Saturday: A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 59. Breezy.

    High: 59 °F

    Chance
    Showers and
    Breezy

  • Saturday Night

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

    Low: 35 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers before 1pm. Cloudy, with a high near 47. Northeast wind around 15 mph, with gusts as high as 30 mph.
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10pm. Low around 42. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Showers and thunderstorms, mainly before 4pm. High near 71. Breezy, with a southeast wind 15 to 20 mph becoming south 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm between 10pm and 1am. Partly cloudy, with a low around 49. Breezy, with a south wind 20 to 25 mph becoming west 10 to 15 mph after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A 40 percent chance of showers after 1pm. Partly sunny, with a high near 73.
Friday Night
Showers before 7pm, then showers and possibly a thunderstorm between 7pm and 4am, then showers after 4am. Low around 50. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 59. Breezy.
Saturday Night
Mostly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 35.
Monday
Mostly sunny, with a high near 56.
Monday Night
Partly cloudy, with a low around 32.
Tuesday
Mostly sunny, with a high near 51.
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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:
12:31 pm CDT Apr 1, 2026
Forecast Valid:
12pm CDT Apr 1, 2026-6pm CDT Apr 7, 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