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

20°F

-7°C

Humidity 70%
Wind Speed Calm
Barometer 30.21 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Last update 24 Feb 1:15 am CST
Extended Forecast for

Mendota IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 17. South wind 5 to 10 mph.

    Low: 17 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of light rain with a slight chance of showers after 5pm. Cloudy, with a high near 45. Breezy, with a south wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph.

    High: 45 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Light Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 22. West northwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 22 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Mostly sunny, with a high near 36. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 36 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 24. Northwest wind around 5 mph becoming east northeast after midnight. Winds could gust as high as 15 mph.

    Low: 24 °F

    Chance Snow

  • Thursday

    Thursday: A 20 percent chance of snow before noon. Mostly sunny, with a high near 40.

    High: 40 °F

    Slight Chance
    Snow then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 26.

    Low: 26 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 17. South wind 5 to 10 mph.
Tuesday
A 30 percent chance of light rain with a slight chance of showers after 5pm. Cloudy, with a high near 45. Breezy, with a south wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph.
Tuesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 22. West northwest wind around 15 mph, with gusts as high as 25 mph.
Wednesday
Mostly sunny, with a high near 36. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 24. Northwest wind around 5 mph becoming east northeast after midnight. Winds could gust as high as 15 mph.
Thursday
A 20 percent chance of snow before noon. Mostly sunny, with a high near 40.
Thursday Night
Mostly clear, with a low around 26.
Friday
Sunny, with a high near 56.
Friday Night
Mostly clear, with a low around 31.
Saturday
Mostly sunny, with a high near 45.
Saturday Night
Mostly cloudy, with a low around 20.
Sunday
A chance of rain and snow. Partly sunny, with a high near 34.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 20.
Monday
A chance of snow. Partly sunny, with a high near 34.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mendota IL
 41.54°N 89.1°W
Last Update:
12:16 am CST Feb 24, 2026
Forecast Valid:
1am CST Feb 24, 2026-6pm CST Mar 2, 2026
 
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