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

57°F

14°C

Humidity 37%
Wind Speed W 18 mph
Barometer 30.08 in (1018.6 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 18 Apr 3:54 pm CDT
Extended Forecast for

3 Miles WNW Carrollton IL

  • Tonight

    Tonight: Clear, with a low around 38. West wind 6 to 14 mph, with gusts as high as 23 mph.

    Low: 38 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 64. West wind 6 to 16 mph, with gusts as high as 26 mph.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36. Northeast wind 5 to 9 mph.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 65. East wind 5 to 8 mph becoming south in the afternoon.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 48. Southeast wind 8 to 10 mph.

    Low: 48 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 38. West wind 6 to 14 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 64. West wind 6 to 16 mph, with gusts as high as 26 mph.
Sunday Night
Mostly clear, with a low around 36. Northeast wind 5 to 9 mph.
Monday
Sunny, with a high near 65. East wind 5 to 8 mph becoming south in the afternoon.
Monday Night
Mostly clear, with a low around 48. Southeast wind 8 to 10 mph.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Mostly sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 46.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 65.
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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:
1:26 pm CDT Apr 18, 2026
Forecast Valid:
4pm CDT Apr 18, 2026-6pm CDT Apr 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation