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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Mendota IL

  • Today

    Today: Partly sunny, with a high near 82. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 82 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 55. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 55 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 79. Calm wind becoming east southeast around 5 mph.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 60. Light south wind becoming south southwest 5 to 10 mph in the evening.

    Low: 60 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Mostly sunny, with a high near 86. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 86 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers after 1am. Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers. Mostly sunny, with a high near 69.

    High: 69 °F

    Chance
    Showers

Detailed Forecast

Today
Partly sunny, with a high near 82. South wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 55. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday
Sunny, with a high near 79. Calm wind becoming east southeast around 5 mph.
Sunday Night
Mostly clear, with a low around 60. Light south wind becoming south southwest 5 to 10 mph in the evening.
Columbus Day
Mostly sunny, with a high near 86. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 63.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
A chance of showers after 1am. Mostly clear, with a low around 54.
Wednesday
A chance of showers. Mostly sunny, with a high near 69.
Wednesday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 52.
Thursday
Showers likely. Mostly cloudy, with a high near 69.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 49.
Friday
Mostly sunny, with a high near 62.
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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:
5:16 am CDT Oct 10, 2026
Forecast Valid:
8am CDT Oct 10, 2026-6pm CDT Oct 16, 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