National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Rain

63°F

17°C

Humidity 93%
Wind Speed S 15 mph
Barometer 29.82 in (1009.6 mb)
Dewpoint 61°F (16°C)
Visibility 8.00 mi
Last update 16 Apr 1:54 am CDT
Extended Forecast for

4 Miles SW Carrollton IL

  • Overnight

    Overnight: Scattered showers and thunderstorms, mainly before 3am. Cloudy, with a low around 61. Southwest wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    Low: 61 °F

    Scattered
    T-storms

  • Thursday

    Thursday: Mostly cloudy through mid morning, then gradual clearing, with a high near 81. West wind around 9 mph.

    High: 81 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 58. South wind 3 to 6 mph.

    Low: 58 °F

    Mostly Clear

  • Friday

    Friday: Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 85. South wind 7 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

    High: 85 °F

    Mostly Sunny
    then Showers
    Likely

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 45. South wind around 14 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%.

    Low: 45 °F

    T-storms then
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers, mainly before 1pm. Mostly sunny, with a high near 57.

    High: 57 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 40.

    Low: 40 °F

    Clear

Detailed Forecast

Overnight
Scattered showers and thunderstorms, mainly before 3am. Cloudy, with a low around 61. Southwest wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Thursday
Mostly cloudy through mid morning, then gradual clearing, with a high near 81. West wind around 9 mph.
Thursday Night
Mostly clear, with a low around 58. South wind 3 to 6 mph.
Friday
Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 85. South wind 7 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Friday Night
Showers and possibly a thunderstorm. Low around 45. South wind around 14 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%.
Saturday
A 40 percent chance of showers, mainly before 1pm. Mostly sunny, with a high near 57.
Saturday Night
Mostly clear, with a low around 37.
Sunday
Sunny, with a high near 63.
Sunday Night
Clear, with a low around 40.
Monday
Sunny, with a high near 70.
Monday Night
Mostly clear, with a low around 50.
Tuesday
Mostly sunny, with a high near 74.
Tuesday Night
A 20 percent chance of showers. Mostly clear, with a low around 53.
Wednesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 77.
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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:
1:25 am CDT Apr 16, 2026
Forecast Valid:
2am CDT Apr 16, 2026-6pm CDT Apr 22, 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