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

2°F

-17°C

Humidity 82%
Wind Speed Calm
Barometer 30.22 in
Dewpoint -2°F (-19°C)
Visibility 10.00 mi
Last update 4 Dec 10:15 pm CST
Extended Forecast for

Mendota IL

  • Tonight

    Tonight: Patchy freezing fog after 11pm. Increasing clouds, with a temperature falling to near -6 by midnight, then rising to around 4 during the remainder of the night. Wind chill values as low as -16. South wind around 5 mph, with gusts as high as 10 mph.

    Low: -6 °F⇑

    Patchy
    Freezing Fog

  • Friday

    Friday: Mostly sunny, with a high near 28. Wind chill values as low as -7. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 28 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Patchy snow and freezing rain before midnight. Mostly cloudy, with a steady temperature around 27. South southwest wind around 10 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    Low: 27 °F

    Patchy Wintry
    Mix then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 27. West northwest wind 5 to 10 mph becoming light and variable in the afternoon.

    High: 27 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Snow likely, mainly after midnight. Cloudy, with a low around 18. Light northeast wind increasing to 5 to 10 mph after midnight. Chance of precipitation is 60%.

    Low: 18 °F

    Chance Snow
    then Snow
    Likely

  • Sunday

    Sunday: A 40 percent chance of snow before noon. Partly sunny, with a high near 22.

    High: 22 °F

    Chance Snow
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 0.

    Low: 0 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 20.

    High: 20 °F

    Partly Sunny

  • Monday Night

    Monday Night: A chance of snow. Mostly cloudy, with a low around 13.

    Low: 13 °F

    Chance Snow

Detailed Forecast

Tonight
Patchy freezing fog after 11pm. Increasing clouds, with a temperature falling to near -6 by midnight, then rising to around 4 during the remainder of the night. Wind chill values as low as -16. South wind around 5 mph, with gusts as high as 10 mph.
Friday
Mostly sunny, with a high near 28. Wind chill values as low as -7. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Patchy snow and freezing rain before midnight. Mostly cloudy, with a steady temperature around 27. South southwest wind around 10 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 27. West northwest wind 5 to 10 mph becoming light and variable in the afternoon.
Saturday Night
Snow likely, mainly after midnight. Cloudy, with a low around 18. Light northeast wind increasing to 5 to 10 mph after midnight. Chance of precipitation is 60%.
Sunday
A 40 percent chance of snow before noon. Partly sunny, with a high near 22.
Sunday Night
Mostly cloudy, with a low around 0.
Monday
Partly sunny, with a high near 20.
Monday Night
A chance of snow. Mostly cloudy, with a low around 13.
Tuesday
Mostly cloudy, with a high near 31.
Tuesday Night
A chance of snow. Cloudy, with a low around 22.
Wednesday
A chance of snow. Mostly cloudy, with a high near 33.
Wednesday Night
Mostly cloudy, with a low around 10.
Thursday
Partly sunny, with a high near 22.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mendota IL
 41.56°N 89.13°W
Last Update:
9:16 pm CST Dec 4, 2025
Forecast Valid:
10pm CST Dec 4, 2025-6pm CST Dec 11, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation