National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fair

22°C

72°F

Humidity 91%
Wind Speed W 7 km/h
Barometer 29.99 in
Dewpoint 21°C (69°F)
Visibility 16 km
Last update 12 Jul 10:35 pm CDT
Extended Forecast for

Illinois Valley Rgnl-Walter A Duncan Field Airport IL

  • Tonight

    Tonight: Mostly clear, with a low around 17. West northwest wind 5 to 10 km/h.

    Low: 17 °C

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 28. North northwest wind 5 to 10 km/h becoming south southwest in the morning.

    High: 28 °C

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 18. Calm wind.

    Low: 18 °C

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 31. Southwest wind around 10 km/h, with gusts as high as 20 km/h.

    High: 31 °C

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 20. Calm wind.

    Low: 20 °C

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 31.

    High: 31 °C

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 21.

    Low: 21 °C

    Slight Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 31.

    High: 31 °C

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 20.

    Low: 20 °C

    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 17. West northwest wind 5 to 10 km/h.
Sunday
Mostly sunny, with a high near 28. North northwest wind 5 to 10 km/h becoming south southwest in the morning.
Sunday Night
Mostly clear, with a low around 18. Calm wind.
Monday
Sunny, with a high near 31. Southwest wind around 10 km/h, with gusts as high as 20 km/h.
Monday Night
Mostly clear, with a low around 20. Calm wind.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 31.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 21.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 31.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 20.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 29.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 18.
Friday
Partly sunny, with a high near 27.
Friday Night
Partly cloudy, with a low around 18.
Saturday
Mostly sunny, with a high near 28.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Illinois Valley Rgnl-Walter A Duncan Field Airport IL
 41.34°N 89.14°W
Last Update:
7:41 pm CDT Jul 12, 2025
Forecast Valid:
10pm CDT Jul 12, 2025-6pm CDT Jul 19, 2025
 
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