National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fog/Mist

45°F

7°C

Humidity 99%
Wind Speed SE 13 mph
Barometer 29.86 in
Dewpoint 45°F (7°C)
Visibility 3.00 mi
Wind Chill39°F (4°C)
Last update 27 Dec 3:55 pm CST
Extended Forecast for

Mendota IL

Wind Advisory December 28, 06:00pm until December 29, 06:00pm
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: Rain likely, mainly after 5am. Patchy fog. Otherwise, cloudy, with a temperature rising to around 49 by 3am. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 43 °F⇑

    Rain Likely
    and Patchy
    Fog

  • Sunday

    Sunday: Rain and possibly a thunderstorm. Areas of fog before noon. High near 55. Breezy, with a south wind 5 to 10 mph becoming west 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 55 °F

    Rain and
    Areas Fog

  • Sunday Night

    Sunday Night: Rain likely before 7pm, then snow likely. Mostly cloudy, with a low around 14. Wind chill values as low as -7. Windy, with a west wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 14 °F

    Windy.
    Rain/Snow
    Likely then
    Chance Snow

  • Monday

    Monday: A 30 percent chance of snow before noon. Mostly cloudy, with a high near 21. Wind chill values as low as -7. Windy, with a west northwest wind 25 to 30 mph, with gusts as high as 45 mph.

    High: 21 °F

    Chance Snow
    and Windy
    then Partly
    Sunny and
    Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around 10. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 10 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 26.

    High: 26 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 31.

    High: 31 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A chance of snow before midnight. Mostly cloudy, with a low around 14.

    Low: 14 °F

    Chance Snow
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Rain likely, mainly after 5am. Patchy fog. Otherwise, cloudy, with a temperature rising to around 49 by 3am. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Rain and possibly a thunderstorm. Areas of fog before noon. High near 55. Breezy, with a south wind 5 to 10 mph becoming west 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday Night
Rain likely before 7pm, then snow likely. Mostly cloudy, with a low around 14. Wind chill values as low as -7. Windy, with a west wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Monday
A 30 percent chance of snow before noon. Mostly cloudy, with a high near 21. Wind chill values as low as -7. Windy, with a west northwest wind 25 to 30 mph, with gusts as high as 45 mph.
Monday Night
Partly cloudy, with a low around 10. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Tuesday
Mostly sunny, with a high near 26.
Tuesday Night
Mostly cloudy, with a low around 22.
Wednesday
Mostly cloudy, with a high near 31.
Wednesday Night
A chance of snow before midnight. Mostly cloudy, with a low around 14.
New Year's Day
Mostly sunny, with a high near 21.
Thursday Night
Mostly clear, with a low around 8.
Friday
Mostly sunny, with a high near 25.
Friday Night
Mostly cloudy, with a low around 17.
Saturday
Partly sunny, with a high near 33.
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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:
3:31 pm CST Dec 27, 2025
Forecast Valid:
4pm CST Dec 27, 2025-6pm CST Jan 3, 2026
 
Forecast Discussion
 
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Additional Resources

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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