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 65%
Wind Speed N 6 mph
Barometer 30.05 in
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 3 Jan 6:35 am CST
Extended Forecast for

Mendota IL

  • Today

    Today: Mostly cloudy, with a high near 28. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 28 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 16. Northwest wind around 5 mph becoming calm after midnight.

    Low: 16 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Increasing clouds, with a high near 30. Calm wind becoming south southeast around 5 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 30 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 27. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 27 °F

    Decreasing
    Clouds

  • Monday

    Monday: Partly sunny, with a high near 44. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 44 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 28. Calm wind becoming west northwest around 5 mph in the afternoon.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 16. Northwest wind around 5 mph becoming calm after midnight.
Sunday
Increasing clouds, with a high near 30. Calm wind becoming south southeast around 5 mph in the afternoon. Winds could gust as high as 15 mph.
Sunday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 27. South wind around 10 mph, with gusts as high as 20 mph.
Monday
Partly sunny, with a high near 44. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Monday Night
Mostly cloudy, with a low around 33.
Tuesday
Mostly sunny, with a high near 49.
Tuesday Night
Partly cloudy, with a low around 30.
Wednesday
Mostly sunny, with a high near 49.
Wednesday Night
Mostly cloudy, with a low around 37.
Thursday
A chance of rain. Mostly cloudy, with a high near 53.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 40.
Friday
A chance of rain. 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:
3:36 am CST Jan 3, 2026
Forecast Valid:
6am CST Jan 3, 2026-6pm CST Jan 9, 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