Severe Weather and Flooding Threat in the Central U.S. and Mid-Atlantic; Dangerous Heat in the West and Southern Plains

Severe thunderstorms and heavy rain are expected across the central High Plains into parts of the central and southern Plains and in the the Mid-Atlantic today. Intense, dangerous heat will persist across the West, Southwest, and Southern Plains into the end of the week. Elevated to critical fire weather conditions expected in the Great Basin and Four Corners region. Read More >

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fair

70°F

21°C

Humidity 53%
Wind Speed E 3 mph
Barometer 30.23 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 23 Jun 9:23 am CDT
Extended Forecast for

Mendota IL

  • Today

    Today: Mostly sunny, with a high near 77. East wind around 5 mph becoming calm.

    High: 77 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 58. Calm wind becoming southeast around 5 mph after midnight.

    Low: 58 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 79. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 40%.

    High: 79 °F

    Partly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 1am.  Partly cloudy, with a low around 60. West southwest wind 5 to 10 mph.

    Low: 60 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Partly sunny, with a high near 78. West northwest wind around 5 mph, with gusts as high as 15 mph.

    High: 78 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers.  Mostly cloudy, with a low around 59.

    Low: 59 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 1pm.  Mostly sunny, with a high near 78. Chance of precipitation is 30%.

    High: 78 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 77. East wind around 5 mph becoming calm.
Tonight
Partly cloudy, with a low around 58. Calm wind becoming southeast around 5 mph after midnight.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. West southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 60. West southwest wind 5 to 10 mph.
Thursday
Partly sunny, with a high near 78. West northwest wind around 5 mph, with gusts as high as 15 mph.
Thursday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 59.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 78. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 61.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
Partly cloudy, with a low around 66.
Sunday
Mostly sunny, with a high near 87. Breezy.
Sunday Night
Mostly clear, with a low around 72.
Monday
Sunny, with a high near 91. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Mendota IL
 41.56°N 89.13°W
8:41 am CDT Jun 23, 2026
10am CDT Jun 23, 2026-6pm CDT Jun 29, 2026
 
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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