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

19°F

-7°C

Humidity 62%
Wind Speed NW 10 mph
Barometer 30.10 in (1019.7 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 17 Jan 7:54 am CST
Extended Forecast for

3 Miles SSW Dow IL

  • Today

    Today: A chance of snow showers, mainly before 10am, then a chance of flurries after 11am. Increasing clouds, with a high near 23. West wind 14 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 23 °F

    Chance Snow
    Showers then
    Mostly Cloudy

  • Tonight

    Tonight: A chance of flurries before 7pm. Cloudy during the early evening, then gradual clearing, with a low around 12. West wind 7 to 14 mph, with gusts as high as 23 mph.

    Low: 12 °F

    Chance
    Flurries

  • Sunday

    Sunday: A 20 percent chance of snow after noon. Increasing clouds, with a high near 32. Southwest wind 7 to 14 mph, with gusts as high as 22 mph.

    High: 32 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 10. Northwest wind 10 to 18 mph, with gusts as high as 28 mph.

    Low: 10 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny and cold, with a high near 20. Northwest wind 9 to 18 mph, with gusts as high as 25 mph.

    High: 20 °F

    Cold

  • Monday Night

    Monday Night: Mostly clear, with a low around 11.

    Low: 11 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

Detailed Forecast

Today
A chance of snow showers, mainly before 10am, then a chance of flurries after 11am. Increasing clouds, with a high near 23. West wind 14 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Tonight
A chance of flurries before 7pm. Cloudy during the early evening, then gradual clearing, with a low around 12. West wind 7 to 14 mph, with gusts as high as 23 mph.
Sunday
A 20 percent chance of snow after noon. Increasing clouds, with a high near 32. Southwest wind 7 to 14 mph, with gusts as high as 22 mph.
Sunday Night
Partly cloudy, with a low around 10. Northwest wind 10 to 18 mph, with gusts as high as 28 mph.
M.L.King Day
Sunny and cold, with a high near 20. Northwest wind 9 to 18 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 11.
Tuesday
Mostly sunny, with a high near 38.
Tuesday Night
Partly cloudy, with a low around 30.
Wednesday
Partly sunny, with a high near 44.
Wednesday Night
Partly cloudy, with a low around 20.
Thursday
A 20 percent chance of snow. Mostly sunny, with a high near 32.
Thursday Night
A slight chance of snow and sleet. Partly cloudy, with a low around 18. Chance of precipitation is 20%.
Friday
A slight chance of rain and snow. Mostly sunny, with a high near 36. Chance of precipitation is 20%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Dow IL
 39°N 90.33°W (Elev. 597 ft)
Last Update:
8:12 am CST Jan 17, 2026
Forecast Valid:
8am CST Jan 17, 2026-6pm CST Jan 23, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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