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.

Overcast

39°F

4°C

Humidity 93%
Wind Speed E 3 mph
Barometer 30.10 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 9 Jan 11:38 pm CST
Extended Forecast for

Mendota IL

  • Tonight

    Tonight: Rain likely before 5am, then rain, possibly mixed with snow. Steady temperature around 38. East southeast wind around 5 mph becoming west after midnight. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 38 °F

    Rain/Snow

  • Saturday

    Saturday: Rain and snow before 11am, then a chance of snow showers. Temperature falling to around 30 by 5pm. Breezy, with a west northwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 35 °F⇓

    Rain/Snow
    then Chance
    Snow Showers
    and Breezy

  • Saturday Night

    Saturday Night: Scattered snow showers before midnight. Mostly cloudy, with a low around 20. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.

    Low: 20 °F

    Blustery.
    Scattered
    Snow Showers
    then Mostly
    Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 31. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 31 °F

    Mostly Sunny
    and Blustery
    then Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 24. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 24 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 41.

    High: 41 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain after noon. Mostly cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Rain likely before 5am, then rain, possibly mixed with snow. Steady temperature around 38. East southeast wind around 5 mph becoming west after midnight. Chance of precipitation is 80%. Little or no snow accumulation expected.
Saturday
Rain and snow before 11am, then a chance of snow showers. Temperature falling to around 30 by 5pm. Breezy, with a west northwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Saturday Night
Scattered snow showers before midnight. Mostly cloudy, with a low around 20. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
Sunday
Mostly sunny, with a high near 31. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Partly cloudy, with a low around 24. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 41.
Monday Night
Mostly cloudy, with a low around 32.
Tuesday
A chance of rain after noon. Mostly cloudy, with a high near 46.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
A chance of snow after noon. Mostly cloudy, with a high near 33.
Wednesday Night
Mostly cloudy, with a low around 17.
Thursday
Mostly sunny, with a high near 29.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 22.
Friday
A chance of snow. Mostly cloudy, 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 89.1°W
Last Update:
11:46 pm CST Jan 9, 2026
Forecast Valid:
11pm CST Jan 9, 2026-6pm CST Jan 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