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

24°F

-4°C

Humidity 84%
Wind Speed N 9 mph
Barometer 30.33 in
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 1 Mar 12:35 am CST
Extended Forecast for

Mendota IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 22. North northeast wind around 10 mph, with gusts as high as 15 mph.

    Low: 22 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 36. East northeast wind around 10 mph, with gusts as high as 15 mph.

    High: 36 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Cloudy, then gradually becoming partly cloudy, with a low around 23. East wind around 10 mph, with gusts as high as 15 mph.

    Low: 23 °F

    Decreasing
    Clouds

  • Monday

    Monday: Partly sunny, with a high near 44. Southeast wind around 10 mph, with gusts as high as 20 mph.

    High: 44 °F

    Partly Sunny

  • Monday Night

    Monday Night: Showers likely after midnight. Cloudy, with a low around 35. Southeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.

    Low: 35 °F

    Mostly Cloudy
    then Showers
    Likely

  • Tuesday

    Tuesday: Showers. High near 46. Chance of precipitation is 80%.

    High: 46 °F

    Showers

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 38.

    Low: 38 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, with thunderstorms also possible after noon. Cloudy, with a high near 55.

    High: 55 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers. Cloudy, with a low around 43.

    Low: 43 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 22. North northeast wind around 10 mph, with gusts as high as 15 mph.
Sunday
Partly sunny, with a high near 36. East northeast wind around 10 mph, with gusts as high as 15 mph.
Sunday Night
Cloudy, then gradually becoming partly cloudy, with a low around 23. East wind around 10 mph, with gusts as high as 15 mph.
Monday
Partly sunny, with a high near 44. Southeast wind around 10 mph, with gusts as high as 20 mph.
Monday Night
Showers likely after midnight. Cloudy, with a low around 35. Southeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
Tuesday
Showers. High near 46. Chance of precipitation is 80%.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 38.
Wednesday
Showers likely, with thunderstorms also possible after noon. Cloudy, with a high near 55.
Wednesday Night
A chance of showers. Cloudy, with a low around 43.
Thursday
A chance of showers. Mostly cloudy, with a high near 57.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 46.
Friday
Showers likely. Mostly cloudy, with a high near 65.
Friday Night
Showers likely. Mostly cloudy, with a low around 44.
Saturday
A chance of showers. Mostly cloudy, with a high near 57.
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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:
12:21 am CST Mar 1, 2026
Forecast Valid:
1am CST Mar 1, 2026-6pm CST Mar 7, 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