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

43°F

6°C

Humidity 60%
Wind Speed E 3 mph
Barometer 30.30 in (1026.3 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 12 Feb 9:54 am CST
Extended Forecast for

3 Miles WNW Carrollton IL

  • Today

    Today: Partly sunny, with a high near 52. Light south wind becoming southeast 5 to 10 mph in the afternoon.

    High: 52 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 32. Southeast wind 6 to 8 mph.

    Low: 32 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 58. South wind 3 to 7 mph.

    High: 58 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 36. Light south wind.

    Low: 36 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Rain likely, mainly after noon. Cloudy, with a high near 51. Southeast wind 3 to 7 mph. Chance of precipitation is 60%.

    High: 51 °F

    Slight Chance
    Rain then
    Rain Likely

  • Saturday Night

    Saturday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.

    Low: 40 °F

    Rain Likely

  • Sunday

    Sunday: A 20 percent chance of rain before noon. Mostly sunny, with a high near 57.

    High: 57 °F

    Slight Chance
    Rain then
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 52. Light south wind becoming southeast 5 to 10 mph in the afternoon.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 32. Southeast wind 6 to 8 mph.
Friday
Sunny, with a high near 58. South wind 3 to 7 mph.
Friday Night
Increasing clouds, with a low around 36. Light south wind.
Saturday
Rain likely, mainly after noon. Cloudy, with a high near 51. Southeast wind 3 to 7 mph. Chance of precipitation is 60%.
Saturday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.
Sunday
A 20 percent chance of rain before noon. Mostly sunny, with a high near 57.
Sunday Night
Mostly clear, with a low around 34.
Washington's Birthday
Mostly sunny, with a high near 59.
Monday Night
Mostly cloudy, with a low around 43.
Tuesday
Mostly cloudy, with a high near 64.
Tuesday Night
Mostly cloudy, with a low around 51.
Wednesday
A 20 percent chance of rain. Partly sunny, with a high near 65.
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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:
10:37 am CST Feb 12, 2026
Forecast Valid:
10am CST Feb 12, 2026-6pm CST Feb 18, 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