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

76°F

24°C

Humidity 37%
Wind Speed SW 15 mph
Barometer 29.77 in
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 21 Mar 2:35 pm CDT
Extended Forecast for

Mendota IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 80. Southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 80 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 49. Southwest wind 5 to 15 mph.

    Low: 49 °F

    Mostly Clear

  • Sunday

    Sunday: A slight chance of showers between 10am and 4pm. Increasing clouds, with a temperature falling to around 47 by 5pm. Breezy, with a north northeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    High: 52 °F⇓

    Slight Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 29. North northeast wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 29 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 48. North northeast wind around 5 mph, with gusts as high as 15 mph.

    High: 48 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 58.

    High: 58 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 60.

    High: 60 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 80. Southwest wind around 15 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a low around 49. Southwest wind 5 to 15 mph.
Sunday
A slight chance of showers between 10am and 4pm. Increasing clouds, with a temperature falling to around 47 by 5pm. Breezy, with a north northeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 29. North northeast wind 5 to 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 48. North northeast wind around 5 mph, with gusts as high as 15 mph.
Monday Night
Mostly cloudy, with a low around 32.
Tuesday
Partly sunny, with a high near 58.
Tuesday Night
Mostly cloudy, with a low around 41.
Wednesday
Mostly cloudy, with a high near 60.
Wednesday Night
Mostly cloudy, with a low around 46.
Thursday
Partly sunny, with a high near 66.
Thursday Night
Mostly cloudy, with a low around 33.
Friday
Partly sunny, with a high near 48.
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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 CDT Mar 21, 2026
Forecast Valid:
2pm CDT Mar 21, 2026-6pm CDT Mar 27, 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