Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

11°F

-12°C

Humidity 81%
Wind Speed E 7 mph
Barometer 30.07 in (1018.8 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill0°F (-18°C)
Last update 5 Dec 7:54 am CST
Extended Forecast for

Dow IL

  • Today

    Today: Sunny, with a high near 39. South wind 6 to 9 mph.

    High: 39 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 27. South wind around 7 mph becoming west after midnight.

    Low: 27 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 35. Northwest wind around 6 mph becoming light and variable.

    High: 35 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of snow after midnight.  Mostly cloudy, with a low around 28. East wind 6 to 8 mph.

    Low: 28 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: A chance of rain and snow before 9am, then a chance of snow between 9am and noon.  Mostly cloudy, with a high near 35. Southeast wind 8 to 14 mph becoming north in the morning. Winds could gust as high as 21 mph.  Chance of precipitation is 30%.

    High: 35 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 10.

    Low: 10 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 29.

    High: 29 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 21.

    Low: 21 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 39. South wind 6 to 9 mph.
Tonight
Mostly cloudy, with a low around 27. South wind around 7 mph becoming west after midnight.
Saturday
Partly sunny, with a high near 35. Northwest wind around 6 mph becoming light and variable.
Saturday Night
A 40 percent chance of snow after midnight. Mostly cloudy, with a low around 28. East wind 6 to 8 mph.
Sunday
A chance of rain and snow before 9am, then a chance of snow between 9am and noon. Mostly cloudy, with a high near 35. Southeast wind 8 to 14 mph becoming north in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 10.
Monday
Mostly sunny, with a high near 29.
Monday Night
Partly cloudy, with a low around 21.
Tuesday
Mostly sunny, with a high near 43.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 43.
Wednesday Night
Mostly cloudy, with a low around 19.
Thursday
Mostly cloudy, with a high near 30.
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ABOUT THIS FORECAST

 
Point Forecast:
Dow IL
 39.04°N 90.33°W (Elev. 623 ft)
6:36 am CST Dec 5, 2025
8am CST Dec 5, 2025-6pm CST Dec 11, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database