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

27°F

-3°C

Humidity 64%
Wind Speed N 6 mph
Barometer 30.27 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 3 Feb 5:40 pm CST
Extended Forecast for

Mendota IL

  • Tonight

    Tonight: Partly cloudy, with a low around 12. North wind 5 to 10 mph.

    Low: 12 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 28. North wind around 5 mph.

    High: 28 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 15. North northwest wind around 5 mph becoming calm. Winds could gust as high as 10 mph.

    Low: 15 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, with a high near 34. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 34 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A chance of snow and sleet after midnight. Mostly cloudy, with a low around 28. Southwest wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 30%.

    Low: 28 °F

    Partly Cloudy
    then Chance
    Snow/Sleet

  • Friday

    Friday: Partly sunny, with a high near 41. Breezy.

    High: 41 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 12. North wind 5 to 10 mph.
Wednesday
Mostly sunny, with a high near 28. North wind around 5 mph.
Wednesday Night
Increasing clouds, with a low around 15. North northwest wind around 5 mph becoming calm. Winds could gust as high as 10 mph.
Thursday
Mostly cloudy, with a high near 34. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday Night
A chance of snow and sleet after midnight. Mostly cloudy, with a low around 28. Southwest wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 41. Breezy.
Friday Night
Partly cloudy, with a low around 16.
Saturday
Mostly sunny, with a high near 31.
Saturday Night
Mostly cloudy, with a low around 23.
Sunday
Partly sunny, with a high near 35.
Sunday Night
Partly cloudy, with a low around 20.
Monday
Mostly sunny, with a high near 40.
Monday Night
Mostly cloudy, with a low around 28.
Tuesday
Partly sunny, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mendota IL
 41.54°N 89.1°W
Last Update:
4:01 pm CST Feb 3, 2026
Forecast Valid:
5pm CST Feb 3, 2026-6pm CST Feb 10, 2026
 
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