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.

Freezing Fog

12°F

-11°C

Humidity 92%
Wind Speed E 7 mph
Barometer 30.07 in (1018.8 mb)
Dewpoint 10°F (-12°C)
Visibility 0.25 mi
Wind Chill1°F (-17°C)
Last update 3 Dec 4:54 am CST
Extended Forecast for

Dow IL

  • Today

    Today: A 50 percent chance of snow, mainly after 4pm. Mostly cloudy, with a high near 36. South wind 5 to 8 mph becoming northwest in the afternoon.

    High: 36 °F

    Mostly Cloudy
    then Chance
    Snow

  • Tonight

    Tonight: Snow likely before 2am, then a chance of flurries between 2am and 3am. Cloudy, with a low around 8. North wind 7 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 8 °F

    Snow Likely
    then Slight
    Chance Snow

  • Thursday

    Thursday: Sunny and cold, with a high near 20. North wind 5 to 9 mph becoming light and variable in the afternoon.

    High: 20 °F

    Cold

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 8. Light and variable wind becoming south around 6 mph after midnight.

    Low: 8 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 36. South wind 5 to 7 mph.

    High: 36 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of rain and snow after noon. Mostly cloudy, with a high near 33. Chance of precipitation is 20%.

    High: 33 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

Detailed Forecast

Today
A 50 percent chance of snow, mainly after 4pm. Mostly cloudy, with a high near 36. South wind 5 to 8 mph becoming northwest in the afternoon.
Tonight
Snow likely before 2am, then a chance of flurries between 2am and 3am. Cloudy, with a low around 8. North wind 7 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday
Sunny and cold, with a high near 20. North wind 5 to 9 mph becoming light and variable in the afternoon.
Thursday Night
Partly cloudy, with a low around 8. Light and variable wind becoming south around 6 mph after midnight.
Friday
Mostly sunny, with a high near 36. South wind 5 to 7 mph.
Friday Night
Mostly cloudy, with a low around 21.
Saturday
Partly sunny, with a high near 34.
Saturday Night
Mostly cloudy, with a low around 22.
Sunday
A slight chance of rain and snow after noon. Mostly cloudy, with a high near 33. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 21.
Monday
Partly sunny, with a high near 32.
Monday Night
Mostly cloudy, with a low around 25.
Tuesday
Partly sunny, with a high near 41.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Dow IL
 39.04°N 90.33°W (Elev. 623 ft)
Last Update:
4:31 am CST Dec 3, 2025
Forecast Valid:
5am CST Dec 3, 2025-6pm CST Dec 9, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation