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

24°F

-4°C

Humidity 81%
Wind Speed E 7 mph
Barometer 30.38 in (1029.3 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 1 Dec 8:54 am CST
Extended Forecast for

3 Miles SSW Dow IL

Winter Weather Advisory December 1, 12:00pm until December 2, 12:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Today

    Today: Snow, mainly after noon. High near 27. Southeast wind 3 to 5 mph. Chance of precipitation is 90%. Total daytime snow accumulation of 1 to 3 inches possible.

    High: 27 °F

    Chance Snow
    then Snow

  • Tonight

    Tonight: Snow, mainly before 11pm. Low around 17. Calm wind becoming northwest 5 to 7 mph in the evening. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 17 °F

    Snow then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 30. Northwest wind around 6 mph becoming south in the afternoon.

    High: 30 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 20. South wind 5 to 7 mph.

    Low: 20 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 38. South wind 6 to 8 mph becoming west in the afternoon.

    High: 38 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 11.

    Low: 11 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny and cold, with a high near 20.

    High: 20 °F

    Cold

  • Thursday Night

    Thursday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 10.

    Low: 10 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Friday

    Friday: A 30 percent chance of snow. Mostly cloudy, with a high near 33.

    High: 33 °F

    Chance Snow

Detailed Forecast

Today
Snow, mainly after noon. High near 27. Southeast wind 3 to 5 mph. Chance of precipitation is 90%. Total daytime snow accumulation of 1 to 3 inches possible.
Tonight
Snow, mainly before 11pm. Low around 17. Calm wind becoming northwest 5 to 7 mph in the evening. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 30. Northwest wind around 6 mph becoming south in the afternoon.
Tuesday Night
Partly cloudy, with a low around 20. South wind 5 to 7 mph.
Wednesday
Partly sunny, with a high near 38. South wind 6 to 8 mph becoming west in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 11.
Thursday
Mostly sunny and cold, with a high near 20.
Thursday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 10.
Friday
A 30 percent chance of snow. Mostly cloudy, with a high near 33.
Friday Night
A slight chance of freezing rain before midnight. Mostly cloudy, with a low around 24. Chance of precipitation is 20%.
Saturday
Partly sunny, with a high near 37.
Saturday Night
Mostly cloudy, with a low around 24.
Sunday
Mostly cloudy, with a high near 34.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Dow IL
 39°N 90.33°W (Elev. 597 ft)
Last Update:
8:51 am CST Dec 1, 2025
Forecast Valid:
9am CST Dec 1, 2025-6pm CST Dec 7, 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