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

35°F

2°C

Humidity 57%
Wind Speed N 8 mph
Barometer 30.64 in (1037.6 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 28 Mar 2:54 am CDT
Extended Forecast for

3 Miles WNW Carrollton IL

Freeze Warning March 28, 02:59am until March 28, 09:00am
Click here for hazard details and duration
Freeze Warning
  •  
    Freeze Warning March 28, 02:59am until March 28, 09:00am

    NOW until 9:00am Sat

    Freeze Warning

  • Overnight

    Low: 26 °F

    Frost

  • Saturday

    Saturday: Widespread frost before 9am. Otherwise, sunny, with a high near 55. Light and variable wind becoming south 5 to 9 mph in the morning.

    High: 55 °F

    Frost then
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 68. South wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 68 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 55. South wind around 11 mph, with gusts as high as 22 mph.

    Low: 55 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of rain after 1am. Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Tuesday

    Tuesday: A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 83. Chance of precipitation is 60%.

    High: 83 °F

    Chance Rain
    then Rain
    Likely

Detailed Forecast

Overnight
Widespread frost after 4am. Otherwise, clear, with a low around 26. North wind 6 to 8 mph.
Saturday
Widespread frost before 9am. Otherwise, sunny, with a high near 55. Light and variable wind becoming south 5 to 9 mph in the morning.
Saturday Night
Partly cloudy, with a low around 39. South wind around 10 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 68. South wind 10 to 14 mph, with gusts as high as 23 mph.
Sunday Night
Partly cloudy, with a low around 55. South wind around 11 mph, with gusts as high as 22 mph.
Monday
Sunny, with a high near 83.
Monday Night
A 20 percent chance of rain after 1am. Partly cloudy, with a low around 65.
Tuesday
A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 83. Chance of precipitation is 60%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 43. Chance of precipitation is 90%.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 54.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 37.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 55.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 41.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 67.
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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 28, 2026
Forecast Valid:
2am CDT Mar 28, 2026-6pm CDT Apr 3, 2026
 
Forecast Discussion
 
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Additional Resources

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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