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

41°F

5°C

Humidity 55%
Wind Speed E 18 mph
Barometer 30.02 in
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 14 Mar 4:55 pm CDT
Extended Forecast for

Mendota IL

  • Tonight

    Tonight: A 10 percent chance of showers after 5am. Mostly cloudy, with a temperature falling to near 37 by 9pm, then rising to around 43 during the remainder of the night. East southeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 37 °F⇑

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10am. High near 60. Breezy, with a south wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 60 °F

    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Rain and snow showers before 10pm, then snow, possibly mixed with sleet between 10pm and 11pm, then snow after 11pm. Patchy blowing snow after 11pm. Low around 18. Windy, with a north northwest wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow and sleet accumulation of 1 to 3 inches possible.

    Low: 18 °F

    Wintry Mix
    and Patchy
    Blowing Snow

  • Monday

    Monday: Snow likely, mainly before 1pm. Widespread blowing snow, mainly before noon. Cloudy, with a high near 22. Wind chill values as low as -1. Windy, with a northwest wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    High: 22 °F

    Snow Likely
    and Blowing
    Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 7. Blustery, with a west northwest wind 15 to 25 mph, with gusts as high as 30 mph.

    Low: 7 °F

    Mostly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 25.

    High: 25 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Snow showers. Low around 20. Chance of precipitation is 80%.

    Low: 20 °F

    Snow Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 10 percent chance of showers after 5am. Mostly cloudy, with a temperature falling to near 37 by 9pm, then rising to around 43 during the remainder of the night. East southeast wind around 15 mph, with gusts as high as 25 mph.
Sunday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10am. High near 60. Breezy, with a south wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Rain and snow showers before 10pm, then snow, possibly mixed with sleet between 10pm and 11pm, then snow after 11pm. Patchy blowing snow after 11pm. Low around 18. Windy, with a north northwest wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow and sleet accumulation of 1 to 3 inches possible.
Monday
Snow likely, mainly before 1pm. Widespread blowing snow, mainly before noon. Cloudy, with a high near 22. Wind chill values as low as -1. Windy, with a northwest wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Monday Night
Mostly cloudy, with a low around 7. Blustery, with a west northwest wind 15 to 25 mph, with gusts as high as 30 mph.
Tuesday
Mostly sunny, with a high near 25.
Tuesday Night
Snow showers. Low around 20. Chance of precipitation is 80%.
Wednesday
Mostly sunny, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 30.
Thursday
Mostly sunny, with a high near 58.
Thursday Night
Mostly cloudy, with a low around 37.
Friday
Mostly sunny, with a high near 62.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Partly sunny, with a high near 65.
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ABOUT THIS FORECAST

 
Point Forecast:
Mendota IL
 41.54°N 89.1°W
Last Update:
3:06 pm CDT Mar 14, 2026
Forecast Valid:
5pm CDT Mar 14, 2026-6pm CDT Mar 21, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation