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.

Overcast

28°F

-2°C

Humidity 74%
Wind Speed SW 15 G 18 mph
Barometer 30.43 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 11 Jan 4:19 pm CST
Extended Forecast for

Mendota IL

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 27. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 27 °F

    Gradual
    Clearing

  • Monday

    Monday: Partly sunny, with a high near 42. West southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 42 °F

    Partly Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 32. Southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 32 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Partly sunny, with a high near 49. West wind around 15 mph, with gusts as high as 25 mph.

    High: 49 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 30. West wind around 15 mph, with gusts as high as 20 mph.

    Low: 30 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: A chance of rain and snow before noon, then a chance of snow. Mostly cloudy, with a high near 35. Breezy. Chance of precipitation is 40%.

    High: 35 °F

    Breezy.
    Chance
    Rain/Snow
    then Chance
    Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 14. Blustery.

    Low: 14 °F

    Mostly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 27.

    High: 27 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of snow. Mostly cloudy, with a low around 22.

    Low: 22 °F

    Chance Snow

Detailed Forecast

Tonight
Cloudy during the early evening, then gradual clearing, with a low around 27. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Partly sunny, with a high near 42. West southwest wind around 10 mph, with gusts as high as 20 mph.
Monday Night
Increasing clouds, with a low around 32. Southwest wind around 10 mph, with gusts as high as 20 mph.
Tuesday
A 20 percent chance of rain after noon. Partly sunny, with a high near 49. West wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 30. West wind around 15 mph, with gusts as high as 20 mph.
Wednesday
A chance of rain and snow before noon, then a chance of snow. Mostly cloudy, with a high near 35. Breezy. Chance of precipitation is 40%.
Wednesday Night
Partly cloudy, with a low around 14. Blustery.
Thursday
Mostly sunny, with a high near 27.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 22.
Friday
A chance of snow after noon. Mostly cloudy, with a high near 34.
Friday Night
A chance of snow. Mostly cloudy, with a low around 17.
Saturday
Mostly cloudy, with a high near 22.
Saturday Night
Partly cloudy, with a low around 8.
Sunday
Mostly sunny, with a high near 22.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mendota IL
 41.54°N 89.13°W
Last Update:
3:11 pm CST Jan 11, 2026
Forecast Valid:
4pm CST Jan 11, 2026-6pm CST Jan 18, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation