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

39°F

4°C

Humidity 70%
Wind Speed SW 9 mph
Barometer 30.11 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 12 Jan 3:59 pm CST
Extended Forecast for

Mendota IL

  • Tonight

    Tonight: Increasing clouds, with a steady temperature around 35. Southwest wind 10 to 15 mph.

    Low: 35 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 50. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 50 °F

    Partly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 27. West northwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 27 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 29. Blustery, with a north northwest wind 20 to 25 mph, with gusts as high as 35 mph.

    High: 29 °F

    Partly Sunny
    and Blustery

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 13. Blustery, with a north northwest wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 13 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 25.

    High: 25 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Snow likely, mainly after midnight. Mostly cloudy, with a low around 21. Chance of precipitation is 60%.

    Low: 21 °F

    Snow Likely

  • Friday

    Friday: Snow likely, mainly after noon. Cloudy, with a high near 33.

    High: 33 °F

    Snow Likely

  • Friday Night

    Friday Night: A chance of snow. Mostly cloudy, with a low around 13.

    Low: 13 °F

    Chance Snow

Detailed Forecast

Tonight
Increasing clouds, with a steady temperature around 35. Southwest wind 10 to 15 mph.
Tuesday
Partly sunny, with a high near 50. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly cloudy, with a low around 27. West northwest wind around 15 mph, with gusts as high as 25 mph.
Wednesday
Partly sunny, with a high near 29. Blustery, with a north northwest wind 20 to 25 mph, with gusts as high as 35 mph.
Wednesday Night
Partly cloudy, with a low around 13. Blustery, with a north northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Thursday
Mostly sunny, with a high near 25.
Thursday Night
Snow likely, mainly after midnight. Mostly cloudy, with a low around 21. Chance of precipitation is 60%.
Friday
Snow likely, mainly after noon. Cloudy, with a high near 33.
Friday Night
A chance of snow. Mostly cloudy, with a low around 13.
Saturday
A chance of snow after noon. Mostly cloudy, with a high near 17.
Saturday Night
Mostly cloudy, with a low around 4.
Sunday
Partly sunny, with a high near 15.
Sunday Night
Partly cloudy, with a low around 5.
M.L.King Day
Partly sunny, with a high near 20.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mendota IL
 41.56°N 89.13°W
Last Update:
3:11 pm CST Jan 12, 2026
Forecast Valid:
4pm CST Jan 12, 2026-6pm CST Jan 19, 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