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

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

34°F

1°C

Humidity 50%
Wind Speed NW 9 mph
Barometer 30.28 in (1025.8 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 21 Feb 7:54 pm CST
Extended Forecast for

5 Miles SSW Fieldon IL

  • Tonight

    Tonight: Mostly clear, with a low around 21. Northwest wind 9 to 15 mph, with gusts as high as 25 mph.

    Low: 21 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 30. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 33 mph.

    High: 30 °F

    Partly Sunny
    then Mostly
    Sunny and
    Blustery

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 15. Northwest wind around 14 mph, with gusts as high as 28 mph.

    Low: 15 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 33. Northwest wind 5 to 13 mph, with gusts as high as 22 mph.

    High: 33 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 20. Calm wind becoming south around 5 mph after midnight.

    Low: 20 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 55.

    High: 55 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 21. Northwest wind 9 to 15 mph, with gusts as high as 25 mph.
Sunday
Mostly sunny, with a high near 30. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 33 mph.
Sunday Night
Partly cloudy, with a low around 15. Northwest wind around 14 mph, with gusts as high as 28 mph.
Monday
Sunny, with a high near 33. Northwest wind 5 to 13 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around 20. Calm wind becoming south around 5 mph after midnight.
Tuesday
Partly sunny, with a high near 55.
Tuesday Night
Mostly cloudy, with a low around 41.
Wednesday
Partly sunny, with a high near 57.
Wednesday Night
A 30 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 34.
Thursday
A 30 percent chance of rain, mainly before noon. Mostly sunny, with a high near 49.
Thursday Night
Mostly clear, with a low around 30.
Friday
Sunny, with a high near 61.
Friday Night
Mostly clear, with a low around 39.
Saturday
Mostly sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Fieldon IL
 39.05°N 90.55°W (Elev. 502 ft)
Last Update:
4:46 pm CST Feb 21, 2026
Forecast Valid:
8pm CST Feb 21, 2026-6pm CST Feb 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation