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

51°F

11°C

Humidity 36%
Wind Speed E 7 G 17 mph
Barometer 30.40 in (1029.4 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 23 Mar 2:54 pm CDT
Extended Forecast for

4 Miles SW Carrollton IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 35. East wind 6 to 8 mph.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 61. Southeast wind 7 to 9 mph.

    High: 61 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42. Southeast wind around 8 mph.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. South wind 6 to 10 mph.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61. South wind 7 to 10 mph.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 40. Breezy. Chance of precipitation is 70%.

    Low: 40 °F

    Showers
    Likely and
    Breezy

  • Friday

    Friday: A 30 percent chance of showers before 1pm. Partly sunny, with a high near 51. Breezy.

    High: 51 °F

    Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 35. East wind 6 to 8 mph.
Tuesday
Mostly sunny, with a high near 61. Southeast wind 7 to 9 mph.
Tuesday Night
Mostly cloudy, with a low around 42. Southeast wind around 8 mph.
Wednesday
Mostly sunny, with a high near 77. South wind 6 to 10 mph.
Wednesday Night
Mostly clear, with a low around 61. South wind 7 to 10 mph.
Thursday
Mostly sunny, with a high near 87.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 40. Breezy. Chance of precipitation is 70%.
Friday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 51. Breezy.
Friday Night
Mostly clear, with a low around 30.
Saturday
Sunny, with a high near 55.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Mostly sunny, with a high near 62.
Sunday Night
Mostly cloudy, with a low around 45.
Monday
A 20 percent chance of rain. Mostly sunny, with a high near 70.
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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:
2:46 pm CDT Mar 23, 2026
Forecast Valid:
3pm CDT Mar 23, 2026-6pm CDT Mar 30, 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