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 82%
Wind Speed S 10 mph
Barometer 29.90 in (1012.0 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 21 Jun 2:54 am CDT
Extended Forecast for

4 Miles NNE Fieldon IL

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

  • Overnight

    Overnight: Clear, with a low around 76. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 95. Heat index values as high as 104. Southwest wind 11 to 16 mph, with gusts as high as 25 mph.

    High: 95 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 77. South wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 77 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 95. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76. South wind 7 to 10 mph.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.

    High: 92 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 76. South wind around 10 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 95. Heat index values as high as 104. Southwest wind 11 to 16 mph, with gusts as high as 25 mph.
Saturday Night
Clear, with a low around 77. South wind 8 to 11 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 95. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 76. South wind 7 to 10 mph.
Monday
Sunny, with a high near 94.
Monday Night
Partly cloudy, with a low around 75.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Tuesday Night
Partly cloudy, with a low around 75.
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 75.
Thursday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 92.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Fieldon IL
 39.16°N 90.46°W (Elev. 600 ft)
Last Update:
2:51 am CDT Jun 21, 2025
Forecast Valid:
3am CDT Jun 21, 2025-6pm CDT Jun 27, 2025
 
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