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.

Overcast

70°F

21°C

Humidity 90%
Wind Speed Calm
Barometer 30.06 in (1017.5 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 14 Oct 11:54 pm CDT
Extended Forecast for

Carrollton IL

  • Overnight

    Overnight: Scattered showers, mainly after 5am. Mostly cloudy, with a low around 63. East wind 3 to 5 mph. Chance of precipitation is 30%.

    Low: 63 °F

    Scattered
    Showers

  • Thursday

    Thursday: Showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and noon, then a chance of showers and thunderstorms after noon. High near 78. East wind 5 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%.

    High: 78 °F

    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before midnight, then a slight chance of showers between midnight and 1am. Increasing clouds, with a low around 43. Northwest wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    Low: 43 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers after 3pm. Partly sunny, with a high near 56. Breezy, with a northwest wind 17 to 21 mph, with gusts as high as 31 mph.

    High: 56 °F

    Breezy.
    Mostly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 36. North wind 6 to 16 mph, with gusts as high as 26 mph.

    Low: 36 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 35.

    Low: 35 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

Detailed Forecast

Overnight
Scattered showers, mainly after 5am. Mostly cloudy, with a low around 63. East wind 3 to 5 mph. Chance of precipitation is 30%.
Thursday
Showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and noon, then a chance of showers and thunderstorms after noon. High near 78. East wind 5 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%.
Thursday Night
Showers and thunderstorms likely before midnight, then a slight chance of showers between midnight and 1am. Increasing clouds, with a low around 43. Northwest wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Friday
A 20 percent chance of showers after 3pm. Partly sunny, with a high near 56. Breezy, with a northwest wind 17 to 21 mph, with gusts as high as 31 mph.
Friday Night
Partly cloudy, with a low around 36. North wind 6 to 16 mph, with gusts as high as 26 mph.
Saturday
Sunny, with a high near 61.
Saturday Night
Clear, with a low around 35.
Sunday
Sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 39.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 80.
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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:
10:21 pm CDT Oct 14, 2026
Forecast Valid:
1am CDT Oct 15, 2026-6pm CDT Oct 21, 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