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.

Fair

38°F

3°C

Humidity 26%
Wind Speed Vrbl 7 mph
Barometer 30.29 in (1025.9 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 22 Jan 1:54 pm CST
Extended Forecast for

3 Miles SSW Dow IL

Winter Storm Watch January 24, 12:00am until January 25, 06:00pm
Cold Weather Advisory January 23, 03:00am until January 24, 12:00pm
Click here for hazard details and duration
Winter Storm Watch
Cold Weather Advisory

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 37. West wind 5 to 7 mph.

    High: 37 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 7. Blustery, with a north wind 5 to 10 mph increasing to 15 to 20 mph after midnight.

    Low: 7 °F

    Partly Cloudy
    then Mostly
    Cloudy and
    Blustery

  • Friday

    Friday: Partly sunny and cold, with a high near 10. Wind chill values as low as -15. Blustery, with a north wind 13 to 20 mph.

    High: 10 °F

    Partly Sunny
    and Blustery
    then Partly
    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 3. Wind chill values as low as -15. Northeast wind around 13 mph.

    Low: 3 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday

    Saturday: Snow. High near 11. Northeast wind around 11 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 11 °F

    Snow Likely
    then Snow

  • Saturday Night

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

    Low: 9 °F

    Snow

  • Sunday

    Sunday: Snow likely, mainly before noon. Cloudy and cold, with a high near 14. Chance of precipitation is 60%.

    High: 14 °F

    Snow Likely

  • Sunday Night

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

    Low: -1 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Monday

    Monday: Sunny and cold, with a high near 17.

    High: 17 °F

    Cold

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 37. West wind 5 to 7 mph.
Tonight
Partly cloudy, with a low around 7. Blustery, with a north wind 5 to 10 mph increasing to 15 to 20 mph after midnight.
Friday
Partly sunny and cold, with a high near 10. Wind chill values as low as -15. Blustery, with a north wind 13 to 20 mph.
Friday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 3. Wind chill values as low as -15. Northeast wind around 13 mph.
Saturday
Snow. High near 11. Northeast wind around 11 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Saturday Night
Snow. Low around 9. 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 14. Chance of precipitation is 60%.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around -1.
Monday
Sunny and cold, with a high near 17.
Monday Night
Mostly clear, with a low around 5.
Tuesday
Mostly sunny, with a high near 30.
Tuesday Night
Mostly cloudy, with a low around 13.
Wednesday
Partly sunny, with a high near 25.
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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:
1:26 pm CST Jan 22, 2026
Forecast Valid:
2pm CST Jan 22, 2026-6pm CST Jan 28, 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