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 89%
Wind Speed Calm
Barometer 29.89 in (1012.1 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 7 Jan 12:54 am CST
Extended Forecast for

4 Miles SW Carrollton IL

  • Overnight

    Overnight: Mostly clear, with a low around 31. Light and variable wind.

    Low: 31 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 61. Calm wind becoming south 5 to 8 mph in the morning.

    High: 61 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 43. Southeast wind around 9 mph.

    Low: 43 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Rain. High near 60. Southeast wind 9 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 90%.

    High: 60 °F

    Rain

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 9pm, then a chance of rain, mainly between 9pm and midnight. Mostly cloudy, with a low around 45. South wind 8 to 14 mph becoming west after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 50%.

    Low: 45 °F

    Chance
    Showers then
    Slight Chance
    Rain

  • Friday

    Friday: Mostly cloudy, with a high near 52.

    High: 52 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 37.

    Low: 37 °F

    Chance Rain

  • Saturday

    Saturday: A slight chance of rain before noon, then a slight chance of rain and snow. Partly sunny, with a high near 43. Chance of precipitation is 20%.

    High: 43 °F

    Slight Chance
    Rain then
    Slight Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 31. Light and variable wind.
Wednesday
Sunny, with a high near 61. Calm wind becoming south 5 to 8 mph in the morning.
Wednesday Night
Increasing clouds, with a low around 43. Southeast wind around 9 mph.
Thursday
Rain. High near 60. Southeast wind 9 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 90%.
Thursday Night
A chance of showers and thunderstorms before 9pm, then a chance of rain, mainly between 9pm and midnight. Mostly cloudy, with a low around 45. South wind 8 to 14 mph becoming west after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 50%.
Friday
Mostly cloudy, with a high near 52.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 37.
Saturday
A slight chance of rain before noon, then a slight chance of rain and snow. Partly sunny, with a high near 43. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 24.
Sunday
Mostly sunny, with a high near 35.
Sunday Night
Mostly clear, with a low around 25.
Monday
Sunny, with a high near 46.
Monday Night
Mostly clear, with a low around 29.
Tuesday
Mostly sunny, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Carrollton IL
 39.25°N 90.46°W (Elev. 600 ft)
Last Update:
12:56 am CST Jan 7, 2026
Forecast Valid:
1am CST Jan 7, 2026-6pm CST Jan 13, 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