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.

Light Snow

8°F

-13°C

Humidity 76%
Wind Speed N 14 mph
Barometer 30.15 in (1021.6 mb)
Dewpoint 2°F (-17°C)
Visibility 2.50 mi
Wind Chill-9°F (-23°C)
Last update 25 Jan 6:54 am CST
Extended Forecast for

3 Miles SSW Dow IL

Extreme Cold Warning January 26, 12:00am until January 26, 12:00pm
Winter Storm Warning January 25, 07:08am until January 25, 06:00pm
Click here for hazard details and duration
Extreme Cold Warning
Winter Storm Warning
  •  
    Winter Storm Warning January 25, 07:08am until January 25, 06:00pm

    NOW until 6:00pm Sun

    Winter Storm Warning

  • Today

    High: 14 °F

    Snow then
    Snow Likely

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around -5. Wind chill values as low as -20. Northwest wind 8 to 13 mph, with gusts as high as 21 mph.

    Low: -5 °F

    Decreasing
    Clouds

  • Monday

    Monday: Sunny and cold, with a high near 15. Wind chill values as low as -20. Northwest wind 8 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 15 °F

    Cold

  • Monday Night

    Monday Night: Mostly clear, with a temperature falling to near 6 by 8pm, then rising to around 13 during the remainder of the night. Southwest wind 7 to 11 mph, with gusts as high as 21 mph.

    Low: 6 °F⇑

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 28. West wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 28 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around -1.

    Low: -1 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 23.

    High: 23 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 0.

    Low: 0 °F

    Partly Cloudy

Detailed Forecast

Today
Snow, mainly before 1pm. High near 14. North wind 14 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. Total daytime snow accumulation of 2 to 4 inches possible.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around -5. Wind chill values as low as -20. Northwest wind 8 to 13 mph, with gusts as high as 21 mph.
Monday
Sunny and cold, with a high near 15. Wind chill values as low as -20. Northwest wind 8 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a temperature falling to near 6 by 8pm, then rising to around 13 during the remainder of the night. Southwest wind 7 to 11 mph, with gusts as high as 21 mph.
Tuesday
Sunny, with a high near 28. West wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.
Tuesday Night
Partly cloudy, with a low around -1.
Wednesday
Mostly sunny, with a high near 23.
Wednesday Night
Partly cloudy, with a low around 0.
Thursday
Partly sunny and cold, with a high near 19.
Thursday Night
Mostly cloudy, with a low around 7.
Friday
Partly sunny and cold, with a high near 20.
Friday Night
Partly cloudy, with a low around 3.
Saturday
Mostly sunny and cold, with a high near 20.
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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:
6:11 am CST Jan 25, 2026
Forecast Valid:
7am CST Jan 25, 2026-6pm CST Jan 31, 2026
 
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