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.

A Few Clouds

41°F

5°C

Humidity 60%
Wind Speed E 13 mph
Barometer 30.31 in (1026.4 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 24 Mar 2:54 am CDT
Extended Forecast for

3 Miles WNW Carrollton IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 35. East wind around 8 mph.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 61. Southeast wind 7 to 11 mph.

    High: 61 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42. Southeast wind around 7 mph.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. South wind 6 to 14 mph.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61. South wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of rain between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 88. Chance of precipitation is 20%.

    High: 88 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 7pm, then showers and possibly a thunderstorm between 7pm and 4am, then rain after 4am. Low around 41. Chance of precipitation is 80%.

    Low: 41 °F

    Showers

  • Friday

    Friday: Rain, mainly before 7am. High near 50. Chance of precipitation is 80%.

    High: 50 °F

    Rain then
    Chance Rain

  • Friday Night

    Friday Night: Mostly clear, with a low around 28.

    Low: 28 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 35. East wind around 8 mph.
Tuesday
Mostly sunny, with a high near 61. Southeast wind 7 to 11 mph.
Tuesday Night
Mostly cloudy, with a low around 42. Southeast wind around 7 mph.
Wednesday
Mostly sunny, with a high near 77. South wind 6 to 14 mph.
Wednesday Night
Mostly clear, with a low around 61. South wind 8 to 10 mph, with gusts as high as 20 mph.
Thursday
A slight chance of rain between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers and thunderstorms before 7pm, then showers and possibly a thunderstorm between 7pm and 4am, then rain after 4am. Low around 41. Chance of precipitation is 80%.
Friday
Rain, mainly before 7am. High near 50. Chance of precipitation is 80%.
Friday Night
Mostly clear, with a low around 28.
Saturday
Sunny, with a high near 56.
Saturday Night
Partly cloudy, with a low around 38.
Sunday
Partly sunny, with a high near 63.
Sunday Night
Partly cloudy, with a low around 45.
Monday
A 20 percent chance of rain. Mostly sunny, with a high near 77.
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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:
2:56 am CDT Mar 24, 2026
Forecast Valid:
3am CDT Mar 24, 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