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.

Overcast

46°F

8°C

Humidity 93%
Wind Speed Calm
Barometer 30.08 in (1018.5 mb)
Dewpoint 44°F (7°C)
Visibility 9.00 mi
Last update 4 Mar 2:54 am CST
Extended Forecast for

Carrollton IL

  • Overnight

    Overnight: A 50 percent chance of showers and thunderstorms. Patchy fog after 5am. Otherwise, cloudy, with a low around 45. Northeast wind around 7 mph.

    Low: 45 °F

    Chance
    T-storms and
    Patchy Fog

  • Wednesday

    Wednesday: Showers and thunderstorms before 4pm, then showers likely. Areas of fog before 2pm. High near 56. Northeast wind around 6 mph becoming southeast in the afternoon. Chance of precipitation is 90%.

    High: 56 °F

    Chance
    T-storms and
    Areas Fog
    then Showers
    and Patchy
    Fog

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 10pm, then showers likely and possibly a thunderstorm between 10pm and 5am, then a chance of showers and thunderstorms after 5am. Patchy fog after 10pm. Otherwise, cloudy, with a low around 48. Northeast wind around 6 mph becoming southwest after midnight. Chance of precipitation is 70%.

    Low: 48 °F

    Showers
    Likely and
    Patchy Fog

  • Thursday

    Thursday: A 40 percent chance of showers, mainly before 9am. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 63. West wind 5 to 9 mph becoming light and variable in the afternoon.

    High: 63 °F

    Chance
    Showers and
    Patchy Fog

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Mostly cloudy, with a low around 53. Light south wind increasing to 5 to 9 mph in the evening. Chance of precipitation is 60%.

    Low: 53 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: Showers likely, mainly before noon. Partly sunny, with a high near 77. Chance of precipitation is 60%.

    High: 77 °F

    Showers
    Likely then
    Chance
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 49. Chance of precipitation is 100%.

    Low: 49 °F

    Showers
    Likely then
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers before noon. Partly sunny, with a high near 61.

    High: 61 °F

    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

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

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Overnight
A 50 percent chance of showers and thunderstorms. Patchy fog after 5am. Otherwise, cloudy, with a low around 45. Northeast wind around 7 mph.
Wednesday
Showers and thunderstorms before 4pm, then showers likely. Areas of fog before 2pm. High near 56. Northeast wind around 6 mph becoming southeast in the afternoon. Chance of precipitation is 90%.
Wednesday Night
A chance of showers and thunderstorms before 10pm, then showers likely and possibly a thunderstorm between 10pm and 5am, then a chance of showers and thunderstorms after 5am. Patchy fog after 10pm. Otherwise, cloudy, with a low around 48. Northeast wind around 6 mph becoming southwest after midnight. Chance of precipitation is 70%.
Thursday
A 40 percent chance of showers, mainly before 9am. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 63. West wind 5 to 9 mph becoming light and variable in the afternoon.
Thursday Night
A slight chance of showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Mostly cloudy, with a low around 53. Light south wind increasing to 5 to 9 mph in the evening. Chance of precipitation is 60%.
Friday
Showers likely, mainly before noon. Partly sunny, with a high near 77. Chance of precipitation is 60%.
Friday Night
Showers and possibly a thunderstorm. Low around 49. Chance of precipitation is 100%.
Saturday
A 30 percent chance of showers before noon. Partly sunny, with a high near 61.
Saturday Night
Mostly clear, with a low around 37.
Sunday
Sunny, with a high near 65.
Sunday Night
Mostly clear, with a low around 44.
Monday
Sunny, with a high near 76.
Monday Night
A 40 percent chance of showers and thunderstorms. Mostly clear, with a low around 57.
Tuesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 75. Chance of precipitation is 70%.
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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:
12:51 am CST Mar 4, 2026
Forecast Valid:
3am CST Mar 4, 2026-6pm CDT Mar 10, 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