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

90°F

32°C

Humidity 58%
Wind Speed SW 7 mph
Barometer 30.00 in (1015.1 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 30 Jun 11:54 am CDT
Extended Forecast for

Carrollton IL

Extreme Heat Warning June 30, 12:39pm until July 3, 10:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 30, 12:39pm until July 3, 10:00pm

    NOW until 10:00pm Fri

    Extreme Heat Warning

  • This Afternoon

    High: 95 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 73. South wind 5 to 7 mph.

    Low: 73 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 95. Heat index values as high as 105. South wind 5 to 9 mph.

    High: 95 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 74. South wind around 6 mph.

    Low: 74 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. Southwest wind 5 to 8 mph.

    High: 96 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73.

    Low: 73 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.

    High: 95 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.

    Low: 72 °F

    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 95. Heat index values as high as 106. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 73. South wind 5 to 7 mph.
Wednesday
Sunny, with a high near 95. Heat index values as high as 105. South wind 5 to 9 mph.
Wednesday Night
Mostly clear, with a low around 74. South wind around 6 mph.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. Southwest wind 5 to 8 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Independence Day
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Monday
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:
12:21 pm CDT Jun 30, 2026
Forecast Valid:
12pm CDT Jun 30, 2026-6pm CDT Jul 6, 2026
 
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