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

72°F

22°C

Humidity 57%
Wind Speed SW 14 mph
Barometer 29.88 in (1011.4 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 12 Apr 8:54 pm CDT
Extended Forecast for

3 Miles WNW Carrollton IL

  • Tonight

    Tonight: A 50 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 64. Southwest wind 11 to 18 mph, with gusts as high as 30 mph.

    Low: 64 °F

    Chance
    Showers then
    Slight Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 85. South wind 10 to 16 mph, with gusts as high as 26 mph.

    High: 85 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 67. South wind around 14 mph, with gusts as high as 24 mph.

    Low: 67 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. Southwest wind 13 to 17 mph, with gusts as high as 28 mph.

    High: 87 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Southwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 78. Chance of precipitation is 80%.

    High: 78 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.

    Low: 60 °F

    Showers
    Likely

  • Thursday

    Thursday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Tonight
A 50 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 64. Southwest wind 11 to 18 mph, with gusts as high as 30 mph.
Monday
Partly sunny, with a high near 85. South wind 10 to 16 mph, with gusts as high as 26 mph.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 67. South wind around 14 mph, with gusts as high as 24 mph.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. Southwest wind 13 to 17 mph, with gusts as high as 28 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Southwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Wednesday
Showers and possibly a thunderstorm. High near 78. Chance of precipitation is 80%.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
Mostly clear, with a low around 60.
Friday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 75. Chance of precipitation is 60%.
Saturday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 41.
Sunday
Mostly sunny, with a high near 61.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Carrollton IL
 39.29°N 90.46°W (Elev. 607 ft)
Last Update:
6:35 pm CDT Apr 12, 2026
Forecast Valid:
9pm CDT Apr 12, 2026-6pm CDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation