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.

Fair

64°F

18°C

Humidity 35%
Wind Speed S 10 mph
Barometer 29.88 in (1011.9 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 7 Jan 3:54 pm CST
Extended Forecast for

Carrollton IL

  • Tonight

    Tonight: Increasing clouds, with a low around 43. Southeast wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 43 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Rain likely before noon, then showers, mainly after noon. High near 62. Breezy, with a southeast wind 10 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 80%.

    High: 62 °F

    Showers and
    Breezy

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 46. South wind 10 to 18 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%.

    Low: 46 °F

    Showers then
    Slight Chance
    Showers

  • Friday

    Friday: Mostly cloudy, with a high near 52. West wind 7 to 10 mph becoming north in the afternoon.

    High: 52 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 40 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 36. North wind 6 to 9 mph.

    Low: 36 °F

    Chance Rain

  • Saturday

    Saturday: A slight chance of rain before noon, then a slight chance of rain and snow. Partly sunny, with a high near 41. Chance of precipitation is 20%.

    High: 41 °F

    Slight Chance
    Rain then
    Slight Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 22.

    Low: 22 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 22.

    Low: 22 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 43. Southeast wind 8 to 10 mph, with gusts as high as 21 mph.
Thursday
Rain likely before noon, then showers, mainly after noon. High near 62. Breezy, with a southeast wind 10 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 80%.
Thursday Night
Showers and possibly a thunderstorm. Low around 46. South wind 10 to 18 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%.
Friday
Mostly cloudy, with a high near 52. West wind 7 to 10 mph becoming north in the afternoon.
Friday Night
A 40 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 36. North wind 6 to 9 mph.
Saturday
A slight chance of rain before noon, then a slight chance of rain and snow. Partly sunny, with a high near 41. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 22.
Sunday
Mostly sunny, with a high near 33.
Sunday Night
Mostly clear, with a low around 22.
Monday
Sunny, with a high near 45.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Mostly sunny, with a high near 48.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 33.
Wednesday
A 20 percent chance of rain. Mostly cloudy, with a high near 40.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Carrollton IL
 39.29°N 90.4°W (Elev. 568 ft)
Last Update:
3:16 pm CST Jan 7, 2026
Forecast Valid:
4pm CST Jan 7, 2026-6pm CST Jan 14, 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