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 and Windy

26°F

-3°C

Humidity 60%
Wind Speed W 30 G 37 mph
Barometer 30.04 in (1017.8 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill9°F (-13°C)
Last update 16 Mar 3:54 pm CDT
Extended Forecast for

2 Miles S Dow IL

  • This Afternoon

    This Afternoon: A chance of flurries. Partly sunny, with a high near 28. Blustery, with a northwest wind around 23 mph, with gusts as high as 34 mph.

    High: 28 °F

    Chance
    Flurries and
    Blustery

  • Tonight

    Tonight: A chance of flurries before 7pm. Mostly cloudy, with a low around 13. Northwest wind 14 to 18 mph, with gusts as high as 26 mph.

    Low: 13 °F

    Chance
    Flurries

  • Tuesday

    Tuesday: Increasing clouds, with a high near 34. Northwest wind 7 to 9 mph becoming south in the afternoon.

    High: 34 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A chance of snow before 4am, then a chance of rain. Mostly cloudy, with a low around 29. Southeast wind 8 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

    Low: 29 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: A 30 percent chance of rain before 7am. Sunny, with a high near 63. South wind around 11 mph becoming west in the afternoon.

    High: 63 °F

    Chance Rain
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of flurries. Partly sunny, with a high near 28. Blustery, with a northwest wind around 23 mph, with gusts as high as 34 mph.
Tonight
A chance of flurries before 7pm. Mostly cloudy, with a low around 13. Northwest wind 14 to 18 mph, with gusts as high as 26 mph.
Tuesday
Increasing clouds, with a high near 34. Northwest wind 7 to 9 mph becoming south in the afternoon.
Tuesday Night
A chance of snow before 4am, then a chance of rain. Mostly cloudy, with a low around 29. Southeast wind 8 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Wednesday
A 30 percent chance of rain before 7am. Sunny, with a high near 63. South wind around 11 mph becoming west in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 42.
Thursday
Sunny, with a high near 72.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Mostly sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 51.
Saturday
Mostly sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 49.
Sunday
Sunny, with a high near 71.
Sunday Night
Mostly cloudy, with a low around 39.
Monday
Mostly sunny, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Dow IL
 39.02°N 90.3°W (Elev. 610 ft)
Last Update:
2:56 pm CDT Mar 16, 2026
Forecast Valid:
4pm CDT Mar 16, 2026-6pm CDT Mar 23, 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