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

45°F

7°C

Humidity 57%
Wind Speed W 17 mph
Barometer 29.91 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 27 Feb 11:02 pm CST
Extended Forecast for

Mendota IL

  • Tonight

    Tonight: Mostly clear, with a low around 28. North northwest wind 5 to 15 mph, with gusts as high as 30 mph.

    Low: 28 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly cloudy, with a high near 39. North wind 5 to 15 mph becoming east northeast in the afternoon. Winds could gust as high as 20 mph.

    High: 39 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 21. North wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 21 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 35. Northeast wind around 10 mph, with gusts as high as 15 mph.

    High: 35 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 21. East wind around 10 mph, with gusts as high as 15 mph.

    Low: 21 °F

    Chance Snow

  • Monday

    Monday: Partly sunny, with a high near 42.

    High: 42 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 40 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 31.

    Low: 31 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain likely, mainly before noon. Cloudy, with a high near 44.

    High: 44 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: A chance of rain. Mostly cloudy, with a low around 32.

    Low: 32 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 28. North northwest wind 5 to 15 mph, with gusts as high as 30 mph.
Saturday
Mostly cloudy, with a high near 39. North wind 5 to 15 mph becoming east northeast in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 21. North wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 35. Northeast wind around 10 mph, with gusts as high as 15 mph.
Sunday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 21. East wind around 10 mph, with gusts as high as 15 mph.
Monday
Partly sunny, with a high near 42.
Monday Night
A 40 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 31.
Tuesday
Rain likely, mainly before noon. Cloudy, with a high near 44.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 32.
Wednesday
A chance of rain. Mostly cloudy, with a high near 49.
Wednesday Night
Rain likely. Cloudy, with a low around 39.
Thursday
Rain likely. Mostly cloudy, with a high near 54.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 40.
Friday
A chance of rain. Cloudy, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mendota IL
 41.54°N 89.1°W
Last Update:
9:31 pm CST Feb 27, 2026
Forecast Valid:
11pm CST Feb 27, 2026-6pm CST Mar 6, 2026
 
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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