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.

Overcast

48°F

9°C

Humidity 86%
Wind Speed N 7 mph
Barometer 29.83 in (1010.0 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 5 May 4:54 pm CDT
Extended Forecast for

Carrollton IL

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. Steady temperature around 48. North wind around 9 mph. Chance of precipitation is 100%.

    High: 48 °F

    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 1am, then a slight chance of showers between 1am and 3am. Low around 43. North wind 3 to 7 mph. Chance of precipitation is 90%.

    Low: 43 °F

    Showers then
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers between 7am and 1pm. Mostly cloudy, with a high near 58. North wind 5 to 7 mph. Chance of precipitation is 20%.

    High: 58 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 38. North wind around 6 mph becoming calm in the evening.

    Low: 38 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 64. Calm wind becoming west 5 to 9 mph in the morning.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. Steady temperature around 48. North wind around 9 mph. Chance of precipitation is 100%.
Tonight
Showers and possibly a thunderstorm before 1am, then a slight chance of showers between 1am and 3am. Low around 43. North wind 3 to 7 mph. Chance of precipitation is 90%.
Wednesday
A slight chance of showers between 7am and 1pm. Mostly cloudy, with a high near 58. North wind 5 to 7 mph. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 38. North wind around 6 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 64. Calm wind becoming west 5 to 9 mph in the morning.
Thursday Night
Mostly clear, with a low around 44.
Friday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 72.
Friday Night
A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 48.
Saturday
Sunny, with a high near 79.
Saturday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 55.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 71.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Sunny, with a high near 70.
Monday Night
Partly cloudy, with a low around 48.
Tuesday
A 20 percent chance of showers. Sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carrollton IL
 39.29°N 90.4°W (Elev. 568 ft)
Last Update:
3:36 pm CDT May 5, 2026
Forecast Valid:
5pm CDT May 5, 2026-6pm CDT May 12, 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