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

28°F

-2°C

Humidity 58%
Wind Speed S 7 mph
Barometer 30.05 in (1017.8 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 21 Jan 6:54 am CST
Extended Forecast for

3 Miles WNW Carrollton IL

  • Today

    Today: Mostly cloudy through mid morning, then gradual clearing, with a high near 41. West wind 11 to 17 mph, with gusts as high as 29 mph.

    High: 41 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 20. West wind 5 to 14 mph becoming northwest after midnight. Winds could gust as high as 25 mph.

    Low: 20 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 35. West wind 3 to 6 mph.

    High: 35 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 4. Light and variable wind becoming north 12 to 17 mph in the evening. Winds could gust as high as 26 mph.

    Low: 4 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 9. North wind 13 to 17 mph, with gusts as high as 26 mph.

    High: 9 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -2.

    Low: -2 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 40 percent chance of snow, mainly after noon. Cloudy and cold, with a high near 11.

    High: 11 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 5.

    Low: 5 °F

    Chance Snow
    then Slight
    Chance Snow

  • Sunday

    Sunday: A 20 percent chance of snow before noon. Partly sunny and cold, with a high near 18.

    High: 18 °F

    Slight Chance
    Snow then
    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy through mid morning, then gradual clearing, with a high near 41. West wind 11 to 17 mph, with gusts as high as 29 mph.
Tonight
Mostly clear, with a low around 20. West wind 5 to 14 mph becoming northwest after midnight. Winds could gust as high as 25 mph.
Thursday
Partly sunny, with a high near 35. West wind 3 to 6 mph.
Thursday Night
Mostly cloudy, with a low around 4. Light and variable wind becoming north 12 to 17 mph in the evening. Winds could gust as high as 26 mph.
Friday
Mostly cloudy and cold, with a high near 9. North wind 13 to 17 mph, with gusts as high as 26 mph.
Friday Night
Mostly cloudy, with a low around -2.
Saturday
A 40 percent chance of snow, mainly after noon. Cloudy and cold, with a high near 11.
Saturday Night
A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 5.
Sunday
A 20 percent chance of snow before noon. Partly sunny and cold, with a high near 18.
Sunday Night
Partly cloudy, with a low around 2.
Monday
Sunny, with a high near 21.
Monday Night
Mostly clear, with a low around 8.
Tuesday
Mostly sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Carrollton IL
 39.29°N 90.46°W (Elev. 607 ft)
Last Update:
6:11 am CST Jan 21, 2026
Forecast Valid:
7am CST Jan 21, 2026-6pm CST Jan 27, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation