National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

42°F

6°C

Humidity 65%
Wind Speed N 15 mph
Barometer 30.24 in (1023.8 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 23 Mar 2:54 am CDT
Extended Forecast for

3 Miles WNW Carrollton IL

  • Overnight

    Overnight: Mostly clear, with a low around 33. North wind around 13 mph, with gusts as high as 23 mph.

    Low: 33 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 53. Northeast wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 53 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A chance of sprinkles after 2am. Mostly cloudy, with a low around 35. Southeast wind 6 to 8 mph.

    Low: 35 °F

    Chance
    Sprinkles

  • Tuesday

    Tuesday: Mostly sunny, with a high near 61. Southeast wind 8 to 11 mph.

    High: 61 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 40. South wind around 7 mph.

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 88.

    High: 88 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

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

    Low: 40 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 33. North wind around 13 mph, with gusts as high as 23 mph.
Monday
Mostly sunny, with a high near 53. Northeast wind 9 to 11 mph, with gusts as high as 20 mph.
Monday Night
A chance of sprinkles after 2am. Mostly cloudy, with a low around 35. Southeast wind 6 to 8 mph.
Tuesday
Mostly sunny, with a high near 61. Southeast wind 8 to 11 mph.
Tuesday Night
Partly cloudy, with a low around 40. South wind around 7 mph.
Wednesday
Mostly sunny, with a high near 74.
Wednesday Night
Mostly clear, with a low around 58.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 88.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 40. Chance of precipitation is 70%.
Friday
A chance of rain showers, mixing with snow after 10am, then gradually ending. Partly sunny, with a high near 51. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 29.
Saturday
Sunny, with a high near 57.
Saturday Night
Mostly clear, with a low around 35.
Sunday
Partly sunny, with a high near 62.
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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:
2:51 am CDT Mar 23, 2026
Forecast Valid:
3am CDT Mar 23, 2026-6pm CDT Mar 29, 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