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.

Fog/Mist

41°F

5°C

Humidity 93%
Wind Speed N 6 mph
Barometer 29.98 in
Dewpoint 39°F (4°C)
Visibility 5.00 mi
Wind Chill37°F (3°C)
Last update 1 May 3:59 am CDT
Extended Forecast for

Mendota IL

  • Overnight

    Overnight: A 20 percent chance of showers. Partly cloudy, with a low around 39. North northwest wind around 10 mph.

    Low: 39 °F

    Slight Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers after 3pm. Mostly sunny, with a high near 53. North northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 53 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: A 10 percent chance of showers before 7pm. Areas of frost after 4am. Otherwise, partly cloudy, with a low around 36. North wind around 5 mph becoming calm after midnight. Winds could gust as high as 10 mph.

    Low: 36 °F

    Slight Chance
    Showers then
    Areas Frost

  • Saturday

    Saturday: Areas of frost before 7am. Otherwise, mostly sunny, with a high near 56. North northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 56 °F

    Areas Frost
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 40. West wind 5 to 10 mph becoming south southwest after midnight. Winds could gust as high as 15 mph.

    Low: 40 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 67. Chance of precipitation is 20%.

    High: 67 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 48. Chance of precipitation is 30%.

    Low: 48 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A 20 percent chance of showers. Partly cloudy, with a low around 39. North northwest wind around 10 mph.
Friday
A 20 percent chance of showers after 3pm. Mostly sunny, with a high near 53. North northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Friday Night
A 10 percent chance of showers before 7pm. Areas of frost after 4am. Otherwise, partly cloudy, with a low around 36. North wind around 5 mph becoming calm after midnight. Winds could gust as high as 10 mph.
Saturday
Areas of frost before 7am. Otherwise, mostly sunny, with a high near 56. North northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday Night
Partly cloudy, with a low around 40. West wind 5 to 10 mph becoming south southwest after midnight. Winds could gust as high as 15 mph.
Sunday
A slight chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 67. Chance of precipitation is 20%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 48. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 75.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 47.
Tuesday
A chance of showers. Partly sunny, with a high near 61.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 41.
Wednesday
Partly sunny, with a high near 58.
Wednesday Night
Partly cloudy, with a low around 39.
Thursday
Mostly sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mendota IL
 41.54°N 89.1°W
Last Update:
4:06 am CDT May 1, 2026
Forecast Valid:
4am CDT May 1, 2026-6pm CDT May 7, 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