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

30°F

-1°C

Humidity 86%
Wind Speed W 3 mph
Barometer 29.95 in
Dewpoint 27°F (-3°C)
Visibility 7.00 mi
Last update 15 Feb 5:01 am CST
Extended Forecast for

Mendota IL

  • Today

    Today: Sunny, with a high near 59. West wind 5 to 10 mph.

    High: 59 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 34. Northwest wind 5 to 10 mph becoming south southwest after midnight.

    Low: 34 °F

    Increasing
    Clouds

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 63. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 63 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 40. South southwest wind 5 to 10 mph becoming southeast after midnight.

    Low: 40 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 58. Southeast wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 58 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A slight chance of rain, then a chance of rain and thunderstorms after midnight. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.

    Low: 52 °F

    Slight Chance
    Rain then
    Chance Rain

  • Wednesday

    Wednesday: Sunny, with a high near 64. Breezy.

    High: 64 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Thursday

    Thursday: A chance of rain after noon. Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny
    then Chance
    Rain

Detailed Forecast

Today
Sunny, with a high near 59. West wind 5 to 10 mph.
Tonight
Increasing clouds, with a low around 34. Northwest wind 5 to 10 mph becoming south southwest after midnight.
Washington's Birthday
Mostly sunny, with a high near 63. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Monday Night
Increasing clouds, with a low around 40. South southwest wind 5 to 10 mph becoming southeast after midnight.
Tuesday
Mostly cloudy, with a high near 58. Southeast wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Tuesday Night
A slight chance of rain, then a chance of rain and thunderstorms after midnight. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.
Wednesday
Sunny, with a high near 64. Breezy.
Wednesday Night
Mostly clear, with a low around 35.
Thursday
A chance of rain after noon. Partly sunny, with a high near 56.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 31.
Friday
A chance of rain and snow. Partly sunny, with a high near 41.
Friday Night
Mostly cloudy, with a low around 23.
Saturday
Partly sunny, with a high near 37.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mendota IL
 41.54°N 89.1°W
Last Update:
2:11 am CST Feb 15, 2026
Forecast Valid:
5am CST Feb 15, 2026-6pm CST Feb 21, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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