National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Extreme Heat and Tropical Storm Bertha Impacts

Dangerous heat will expand from the Gulf Coast into the Southern Plains and Desert Southwest through week's end. Additional extreme heat impacting the Pacific Northwest will shift to the northern Plains by the weekend. Tropical Storm Bertha is expected to continue to impact portions of the northern Gulf Coast from the western Florida Panhandle to southeastern Louisiana through tonight. Read More >

Hazardous Weather Conditions

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Partly Cloudy

N/A

Humidity NA
Wind Speed E 5 mph
Barometer 30.15 in
Dewpoint N/A
Visibility 10.00 mi
Last update 22 Jul 10:55 pm CDT
Extended Forecast for

4 Miles SSW Mendota IL

  • Tonight

    Tonight: Mostly clear, with a low around 54. East northeast wind around 5 mph becoming calm.

    Low: 54 °F

    Mostly Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 76. Calm wind.

    High: 76 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 58. East southeast wind around 5 mph becoming calm.

    Low: 58 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 78. Calm wind becoming south around 5 mph in the morning. Winds could gust as high as 15 mph.

    High: 78 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61. South wind around 5 mph, with gusts as high as 10 mph.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 54. East northeast wind around 5 mph becoming calm.
Thursday
Increasing clouds, with a high near 76. Calm wind.
Thursday Night
Mostly cloudy, with a low around 58. East southeast wind around 5 mph becoming calm.
Friday
Mostly sunny, with a high near 78. Calm wind becoming south around 5 mph in the morning. Winds could gust as high as 15 mph.
Friday Night
Partly cloudy, with a low around 61. South wind around 5 mph, with gusts as high as 10 mph.
Saturday
Mostly sunny, with a high near 83.
Saturday Night
Mostly clear, with a low around 69.
Sunday
Mostly sunny, with a high near 90.
Sunday Night
Partly cloudy, with a low around 71.
Monday
Sunny, with a high near 90.
Monday Night
Partly cloudy, with a low around 69.
Tuesday
Sunny, with a high near 87.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
Sunny, with a high near 85.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Mendota IL
 41.5°N 89.13°W
Last Update:
11:01 pm CDT Jul 22, 2026
Forecast Valid:
11pm CDT Jul 22, 2026-6pm CDT Jul 29, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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