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

N/A

Humidity NA
Wind Speed E 12 mph
Barometer 30.14 in
Dewpoint N/A
Visibility 10.00 mi
Last update 14 Oct 9:40 pm CDT
Extended Forecast for

Mendota IL

  • Overnight

    Overnight: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 55. East northeast wind around 10 mph, with gusts as high as 15 mph.

    Low: 55 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 4pm. High near 62. East wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 62 °F

    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 47. Breezy, with an east wind 5 to 10 mph becoming northwest 15 to 20 mph in the evening. Winds could gust as high as 30 mph. Chance of precipitation is 50%.

    Low: 47 °F

    Chance
    Showers and
    Breezy

  • Friday

    Friday: A 50 percent chance of showers. Partly sunny, with a high near 54. Breezy, with a northwest wind 20 to 25 mph, with gusts as high as 30 mph.

    High: 54 °F

    Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: Patchy frost after 4am. Otherwise, mostly clear, with a low around 35. Breezy, with a north wind 15 to 20 mph decreasing to 10 to 15 mph after midnight.

    Low: 35 °F

    Partly Cloudy
    and Breezy
    then Patchy
    Frost

  • Saturday

    Saturday: Areas of frost before 9am. Otherwise, sunny, with a high near 58.

    High: 58 °F

    Areas Frost
    then Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 38.

    Low: 38 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 55. East northeast wind around 10 mph, with gusts as high as 15 mph.
Thursday
Showers, with thunderstorms also possible after 4pm. High near 62. East wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 47. Breezy, with an east wind 5 to 10 mph becoming northwest 15 to 20 mph in the evening. Winds could gust as high as 30 mph. Chance of precipitation is 50%.
Friday
A 50 percent chance of showers. Partly sunny, with a high near 54. Breezy, with a northwest wind 20 to 25 mph, with gusts as high as 30 mph.
Friday Night
Patchy frost after 4am. Otherwise, mostly clear, with a low around 35. Breezy, with a north wind 15 to 20 mph decreasing to 10 to 15 mph after midnight.
Saturday
Areas of frost before 9am. Otherwise, sunny, with a high near 58.
Saturday Night
Clear, with a low around 38.
Sunday
Sunny, with a high near 65.
Sunday Night
Mostly clear, with a low around 41.
Monday
Mostly sunny, with a high near 68.
Monday Night
Partly cloudy, with a low around 44.
Tuesday
Sunny, with a high near 71.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 74.
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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:
9:51 pm CDT Oct 14, 2026
Forecast Valid:
12am CDT Oct 15, 2026-6pm CDT Oct 21, 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