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

58°F

14°C

Humidity 24%
Wind Speed N 10 mph
Barometer 29.97 in (1014.9 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 13 Mar 5:54 pm CDT
Extended Forecast for

3 Miles WNW Carrollton IL

  • Tonight

    Tonight: Partly cloudy, with a low around 34. Northwest wind 5 to 10 mph becoming northeast after midnight.

    Low: 34 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 60. Southeast wind 8 to 15 mph, with gusts as high as 23 mph.

    High: 60 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 52. Southeast wind 11 to 15 mph, with gusts as high as 26 mph.

    Low: 52 °F

    Partly Cloudy

  • Sunday

    Sunday: Rain, mainly between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. High near 68. Breezy, with a south wind 17 to 22 mph, with gusts as high as 40 mph. Chance of precipitation is 90%.

    High: 68 °F

    Breezy.
    Chance Rain
    then Showers

  • Sunday Night

    Sunday Night: Rain before 10pm, then snow. Some thunder is also possible. Low around 19. Breezy, with a west wind 21 to 26 mph, with gusts as high as 47 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 19 °F

    Breezy.
    Rain/Snow
    then Snow

  • Monday

    Monday: A 40 percent chance of snow before 1pm. Mostly cloudy, with a high near 26. Blustery.

    High: 26 °F

    Chance Snow
    and Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 10. Blustery.

    Low: 10 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain and snow. Mostly cloudy, with a low around 26. Chance of precipitation is 40%.

    Low: 26 °F

    Chance
    Rain/Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 34. Northwest wind 5 to 10 mph becoming northeast after midnight.
Saturday
Mostly sunny, with a high near 60. Southeast wind 8 to 15 mph, with gusts as high as 23 mph.
Saturday Night
Partly cloudy, with a low around 52. Southeast wind 11 to 15 mph, with gusts as high as 26 mph.
Sunday
Rain, mainly between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. High near 68. Breezy, with a south wind 17 to 22 mph, with gusts as high as 40 mph. Chance of precipitation is 90%.
Sunday Night
Rain before 10pm, then snow. Some thunder is also possible. Low around 19. Breezy, with a west wind 21 to 26 mph, with gusts as high as 47 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Monday
A 40 percent chance of snow before 1pm. Mostly cloudy, with a high near 26. Blustery.
Monday Night
Mostly clear, with a low around 10. Blustery.
Tuesday
Mostly sunny, with a high near 34.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 26. Chance of precipitation is 40%.
Wednesday
Mostly sunny, with a high near 61.
Wednesday Night
Mostly clear, with a low around 36.
Thursday
Mostly sunny, with a high near 67.
Thursday Night
Mostly clear, with a low around 42.
Friday
Sunny, with a high near 67.
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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:
6:16 pm CDT Mar 13, 2026
Forecast Valid:
6pm CDT Mar 13, 2026-6pm CDT Mar 20, 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