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

59°F

15°C

Humidity 55%
Wind Speed W 8 G 16 mph
Barometer 29.91 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 15 Feb 1:02 pm CST
Extended Forecast for

Mendota IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 59. West northwest wind 5 to 10 mph.

    High: 59 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after midnight. Otherwise, increasing clouds, with a low around 36. Calm wind becoming south southwest around 5 mph after midnight. Winds could gust as high as 10 mph.

    Low: 36 °F

    Mostly Clear
    then Patchy
    Fog

  • Washington's Birthday

    Washington's Birthday: Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 63. West southwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 63 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 40. South southwest wind around 5 mph becoming southeast after midnight. Winds could gust as high as 15 mph.

    Low: 40 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 59. Southeast wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 59 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Showers likely, with thunderstorms also possible after 3am. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.

    Low: 51 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday

    Wednesday: A 20 percent chance of showers before noon. Sunny, with a high near 65. Breezy.

    High: 65 °F

    Breezy.
    Slight Chance
    Showers then
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of rain after noon. Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny
    then Chance
    Rain

Detailed Forecast

This Afternoon
Sunny, with a high near 59. West northwest wind 5 to 10 mph.
Tonight
Patchy fog after midnight. Otherwise, increasing clouds, with a low around 36. Calm wind becoming south southwest around 5 mph after midnight. Winds could gust as high as 10 mph.
Washington's Birthday
Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 63. West 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 around 5 mph becoming southeast after midnight. Winds could gust as high as 15 mph.
Tuesday
Mostly cloudy, with a high near 59. Southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Showers likely, with thunderstorms also possible after 3am. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.
Wednesday
A 20 percent chance of showers before noon. Sunny, with a high near 65. Breezy.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
A chance of rain after noon. Partly sunny, with a high near 60.
Thursday Night
A chance of rain. Partly cloudy, with a low around 33.
Friday
Mostly sunny, with a high near 45.
Friday Night
Partly cloudy, with a low around 26.
Saturday
Mostly sunny, with a high near 41.
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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:
12:51 pm CST Feb 15, 2026
Forecast Valid:
1pm CST Feb 15, 2026-6pm CST Feb 21, 2026
 
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Additional Resources

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Chance of Precipitation