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

60°F

16°C

Humidity 50%
Wind Speed S 10 mph
Barometer 30.02 in (1016.3 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 29 Mar 8:54 pm CDT
Extended Forecast for

4 Miles SW Carrollton IL

  • Tonight

    Tonight: Partly cloudy, with a low around 55. South wind 9 to 11 mph, with gusts as high as 25 mph.

    Low: 55 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 84. Southwest wind 10 to 17 mph, with gusts as high as 28 mph.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63. South wind 13 to 15 mph, with gusts as high as 26 mph.

    Low: 63 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of rain and thunderstorms. Partly sunny, with a high near 83. Southwest wind 15 to 18 mph, with gusts as high as 32 mph.

    High: 83 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 51. Southwest wind around 11 mph becoming north after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 90%.

    Low: 51 °F

    Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. High near 62. Chance of precipitation is 80%.

    High: 62 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 47. Chance of precipitation is 90%.

    Low: 47 °F

    Rain

  • Thursday

    Thursday: Rain. High near 62. Chance of precipitation is 80%.

    High: 62 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely, mainly before 1am. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.

    Low: 45 °F

    Rain Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 55. South wind 9 to 11 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 84. Southwest wind 10 to 17 mph, with gusts as high as 28 mph.
Monday Night
Partly cloudy, with a low around 63. South wind 13 to 15 mph, with gusts as high as 26 mph.
Tuesday
A 50 percent chance of rain and thunderstorms. Partly sunny, with a high near 83. Southwest wind 15 to 18 mph, with gusts as high as 32 mph.
Tuesday Night
Rain and possibly a thunderstorm. Low around 51. Southwest wind around 11 mph becoming north after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 90%.
Wednesday
Rain and possibly a thunderstorm. High near 62. Chance of precipitation is 80%.
Wednesday Night
Rain and possibly a thunderstorm. Low around 47. Chance of precipitation is 90%.
Thursday
Rain. High near 62. Chance of precipitation is 80%.
Thursday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.
Friday
A 40 percent chance of rain, mainly after 1pm. Mostly cloudy, with a high near 71.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 55.
Saturday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.
Saturday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.
Sunday
A 30 percent chance of rain. Partly sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Carrollton IL
 39.25°N 90.46°W (Elev. 600 ft)
Last Update:
8:46 pm CDT Mar 29, 2026
Forecast Valid:
9pm CDT Mar 29, 2026-6pm CDT Apr 5, 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