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

80°F

27°C

Humidity 79%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 14 Jul 7:55 pm CDT
Extended Forecast for

Mark IL

  • Tonight

    Tonight: Mostly clear, with a low around 66. Calm wind becoming east around 5 mph.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 87. Calm wind becoming south around 5 mph in the morning.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 71. South wind around 5 mph.

    Low: 71 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. Southwest wind around 5 mph.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 10pm, then showers and thunderstorms likely, mainly between 10pm and 1am. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.

    Low: 69 °F

    T-storms
    Likely

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82.

    High: 82 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 63.

    Low: 63 °F

    Chance
    T-storms

  • Friday

    Friday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 66. Calm wind becoming east around 5 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 87. Calm wind becoming south around 5 mph in the morning.
Tuesday Night
A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 71. South wind around 5 mph.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. Southwest wind around 5 mph.
Wednesday Night
Showers likely and possibly a thunderstorm before 10pm, then showers and thunderstorms likely, mainly between 10pm and 1am. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82.
Thursday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 63.
Friday
Mostly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 66.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Sunday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Sunday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Monday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
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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:
6:32 pm CDT Jul 14, 2025
Forecast Valid:
8pm CDT Jul 14, 2025-6pm CDT Jul 21, 2025
 
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