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

32°F

0°C

Humidity 38%
Wind Speed NW 13 G 23 mph
Barometer 30.27 in (1025.4 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 21 Jan 11:54 pm CST
Extended Forecast for

3 Miles WNW Carrollton IL

  • Overnight

    Overnight: Mostly clear, with a low around 22. Northwest wind 6 to 13 mph, with gusts as high as 23 mph.

    Low: 22 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 37. West wind 5 to 8 mph.

    High: 37 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 6. West wind 5 to 10 mph becoming north 12 to 17 mph after midnight. Winds could gust as high as 26 mph.

    Low: 6 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 10. Wind chill values as low as -15. North wind 13 to 17 mph, with gusts as high as 26 mph.

    High: 10 °F

    Cold

  • Friday Night

    Friday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 1. North wind around 11 mph, with gusts as high as 20 mph.

    Low: 1 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday

    Saturday: Snow likely, mainly after noon. Cloudy and cold, with a high near 13. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 13 °F

    Snow Likely

  • Saturday Night

    Saturday Night: Snow, mainly before midnight. Low around 7. Chance of precipitation is 80%.

    Low: 7 °F

    Snow then
    Chance Snow

  • Sunday

    Sunday: A 40 percent chance of snow, mainly before noon. Partly sunny and cold, with a high near 18.

    High: 18 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around -2.

    Low: -2 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 22. Northwest wind 6 to 13 mph, with gusts as high as 23 mph.
Thursday
Partly sunny, with a high near 37. West wind 5 to 8 mph.
Thursday Night
Mostly cloudy, with a low around 6. West wind 5 to 10 mph becoming north 12 to 17 mph after midnight. Winds could gust as high as 26 mph.
Friday
Mostly cloudy and cold, with a high near 10. Wind chill values as low as -15. North wind 13 to 17 mph, with gusts as high as 26 mph.
Friday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 1. North wind around 11 mph, with gusts as high as 20 mph.
Saturday
Snow likely, mainly after noon. Cloudy and cold, with a high near 13. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Saturday Night
Snow, mainly before midnight. Low around 7. Chance of precipitation is 80%.
Sunday
A 40 percent chance of snow, mainly before noon. Partly sunny and cold, with a high near 18.
Sunday Night
Partly cloudy, with a low around -2.
Monday
Sunny and cold, with a high near 15.
Monday Night
Mostly clear, with a low around 3.
Tuesday
Mostly sunny, with a high near 28.
Tuesday Night
Partly cloudy, with a low around 11.
Wednesday
Partly sunny, with a high near 25.
Basemap Options
Click map to change the forecast location
Loading map...
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:
9:51 pm CST Jan 21, 2026
Forecast Valid:
12am CST Jan 22, 2026-6pm CST Jan 28, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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