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

38°F

3°C

Humidity 25%
Wind Speed E 12 mph
Barometer 30.43 in
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 1 Mar 3:10 pm CST
Extended Forecast for

Mendota IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 37. East wind around 10 mph.

    High: 37 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 23. East wind around 10 mph, with gusts as high as 20 mph.

    Low: 23 °F

    Decreasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 46. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 46 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Scattered showers, mainly after 3am. Mostly cloudy, with a low around 33. East southeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 30%.

    Low: 33 °F

    Mostly Cloudy
    then
    Scattered
    Showers

  • Tuesday

    Tuesday: Showers. High near 46. East wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 80%.

    High: 46 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely before 9pm, then showers likely and possibly a thunderstorm between 9pm and 3am, then showers likely after 3am. Mostly cloudy, with a low around 38. Chance of precipitation is 60%.

    Low: 38 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely, with thunderstorms also possible after noon. Cloudy, with a high near 55. Chance of precipitation is 60%.

    High: 55 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely. Cloudy, with a low around 43.

    Low: 43 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers likely, mainly before noon. Mostly cloudy, with a high near 59.

    High: 59 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 37. East wind around 10 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 23. East wind around 10 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 46. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Monday Night
Scattered showers, mainly after 3am. Mostly cloudy, with a low around 33. East southeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 30%.
Tuesday
Showers. High near 46. East wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 80%.
Tuesday Night
Showers likely before 9pm, then showers likely and possibly a thunderstorm between 9pm and 3am, then showers likely after 3am. Mostly cloudy, with a low around 38. Chance of precipitation is 60%.
Wednesday
Showers likely, with thunderstorms also possible after noon. Cloudy, with a high near 55. Chance of precipitation is 60%.
Wednesday Night
Showers likely. Cloudy, with a low around 43.
Thursday
Showers likely, mainly before noon. Mostly cloudy, with a high near 59.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 45.
Friday
Showers. Mostly cloudy, with a high near 69.
Friday Night
Showers likely. Mostly cloudy, with a low around 40.
Saturday
A chance of showers. Mostly cloudy, with a high near 56.
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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:
2:41 pm CST Mar 1, 2026
Forecast Valid:
3pm 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