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

34°F

1°C

Humidity 81%
Wind Speed SW 8 mph
Barometer 30.06 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 12 Jan 8:19 pm CST
Extended Forecast for

Mendota IL

  • Tonight

    Tonight: Increasing clouds, with a low around 32. Southwest wind 5 to 15 mph.

    Low: 32 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 50. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 50 °F

    Partly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 27. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 27 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 29. Blustery, with a north northwest wind 15 to 25 mph, with gusts as high as 35 mph.

    High: 29 °F

    Partly Sunny
    and Blustery

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 13. North northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 13 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 25.

    High: 25 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Snow likely, mainly after midnight. Mostly cloudy, with a low around 21. Chance of precipitation is 60%.

    Low: 21 °F

    Snow Likely

  • Friday

    Friday: Snow likely, mainly after noon. Cloudy, with a high near 33.

    High: 33 °F

    Snow Likely

  • Friday Night

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

    Low: 13 °F

    Chance Snow

Detailed Forecast

Tonight
Increasing clouds, with a low around 32. Southwest wind 5 to 15 mph.
Tuesday
Partly sunny, with a high near 50. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly cloudy, with a low around 27. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday
Partly sunny, with a high near 29. Blustery, with a north northwest wind 15 to 25 mph, with gusts as high as 35 mph.
Wednesday Night
Partly cloudy, with a low around 13. North northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
Mostly sunny, with a high near 25.
Thursday Night
Snow likely, mainly after midnight. Mostly cloudy, with a low around 21. Chance of precipitation is 60%.
Friday
Snow likely, mainly after noon. Cloudy, with a high near 33.
Friday Night
A chance of snow. Mostly cloudy, with a low around 13.
Saturday
A chance of snow after noon. Mostly cloudy, with a high near 18.
Saturday Night
Mostly cloudy, with a low around 4.
Sunday
Partly sunny, with a high near 16.
Sunday Night
Partly cloudy, with a low around 5.
M.L.King Day
Partly sunny, with a high near 20.
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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:
8:21 pm CST Jan 12, 2026
Forecast Valid:
8pm CST Jan 12, 2026-6pm CST Jan 19, 2026
 
Forecast Discussion
 
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Additional Resources

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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