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

7°F

-14°C

Humidity 37%
Wind Speed N 16 mph
Barometer 30.69 in (1040.1 mb)
Dewpoint -14°F (-26°C)
Visibility 10.00 mi
Wind Chill-11°F (-24°C)
Last update 23 Jan 8:54 am CST
Extended Forecast for

3 Miles SSW Dow IL

Cold Weather Advisory until January 24, 12:00pm
Winter Storm Warning January 24, 09:00am until January 25, 06:00pm
Click here for hazard details and duration
Cold Weather Advisory
Winter Storm Warning
  •  
    Cold Weather Advisory until January 24, 12:00pm

    NOW until 12:00pm Sat

    Cold Weather Advisory

  • Today

    High: 10 °F

    Cloudy and
    Blustery then
    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 2. Wind chill values as low as -15. Northeast wind 11 to 14 mph.

    Low: 2 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Snow, mainly after noon. High near 11. Wind chill values as low as -10. Northeast wind around 11 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 11 °F

    Chance Snow
    then Snow

  • Saturday Night

    Saturday Night: Snow. Low around 8. Northeast wind 9 to 11 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

    Low: 8 °F

    Snow

  • Sunday

    Sunday: Snow likely, mainly before noon. Cloudy and cold, with a high near 15. North wind 11 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.

    High: 15 °F

    Snow Likely

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before midnight. Partly cloudy, with a low around -1.

    Low: -1 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Monday

    Monday: Sunny and cold, with a high near 16.

    High: 16 °F

    Cold

  • Monday Night

    Monday Night: Clear, with a low around 6.

    Low: 6 °F

    Clear

Detailed Forecast

Today
Cloudy early, then gradual clearing and cold, with a high near 10. Wind chill values as low as -15. Blustery, with a north wind 15 to 20 mph.
Tonight
Increasing clouds, with a low around 2. Wind chill values as low as -15. Northeast wind 11 to 14 mph.
Saturday
Snow, mainly after noon. High near 11. Wind chill values as low as -10. Northeast wind around 11 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Saturday Night
Snow. Low around 8. Northeast wind 9 to 11 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.
Sunday
Snow likely, mainly before noon. Cloudy and cold, with a high near 15. North wind 11 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.
Sunday Night
A 20 percent chance of snow before midnight. Partly cloudy, with a low around -1.
Monday
Sunny and cold, with a high near 16.
Monday Night
Clear, with a low around 6.
Tuesday
Mostly sunny, with a high near 30.
Tuesday Night
Mostly cloudy, with a low around 8.
Wednesday
Partly sunny, with a high near 22.
Wednesday Night
Partly cloudy, with a low around 3.
Thursday
Mostly sunny and cold, with a high near 17.
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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:
8:36 am CST Jan 23, 2026
Forecast Valid:
9am CST Jan 23, 2026-6pm CST Jan 29, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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