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

Hazardous Weather Conditions

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

79°F

26°C

Humidity 85%
Wind Speed S 7 mph
Barometer 29.92 in (1012.5 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 21 Jun 4:54 am CDT
Extended Forecast for

Carrollton IL

Heat Advisory June 21, 12:00pm until June 24, 09:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Sunny, with a high near 94. Heat index values as high as 103. Southwest wind 10 to 16 mph, with gusts as high as 25 mph.

    High: 94 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 75. South wind 9 to 13 mph, with gusts as high as 21 mph.

    Low: 75 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 94. Southwest wind 8 to 14 mph, with gusts as high as 21 mph.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 74. South wind 8 to 10 mph.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 94. Southwest wind 7 to 9 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

    High: 91 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 94. Heat index values as high as 103. Southwest wind 10 to 16 mph, with gusts as high as 25 mph.
Tonight
Clear, with a low around 75. South wind 9 to 13 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 94. Southwest wind 8 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 74. South wind 8 to 10 mph.
Monday
Sunny, with a high near 94. Southwest wind 7 to 9 mph.
Monday Night
Mostly clear, with a low around 74.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Tuesday Night
Partly cloudy, with a low around 74.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92.
Wednesday Night
Mostly clear, with a low around 74.
Thursday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 91.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carrollton IL
 39.29°N 90.4°W (Elev. 568 ft)
Last Update:
3:21 am CDT Jun 21, 2025
Forecast Valid:
5am CDT Jun 21, 2025-6pm CDT Jun 27, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation