National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Mostly Cloudy

36°F

2°C

Humidity 86%
Wind Speed E 9 mph
Barometer 29.89 in (1012.4 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 6 Dec 8:54 pm CST
Extended Forecast for

3 Miles E Dow IL

  • Tonight

    Tonight: A slight chance of rain before 4am, then a slight chance of rain after 5am. Cloudy, with a low around 33. Southeast wind 6 to 9 mph. Chance of precipitation is 20%.

    Low: 33 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: A slight chance of drizzle before 11am. Cloudy, with a temperature rising to near 36 by 9am, then falling to around 30 during the remainder of the day. South wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 24 mph.

    High: 36 °F⇓

    Slight Chance
    Drizzle then
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 16. North wind 6 to 13 mph, with gusts as high as 21 mph.

    Low: 16 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 30. Light and variable wind becoming south around 6 mph in the afternoon.

    High: 30 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 22. South wind 6 to 10 mph.

    Low: 22 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy
    then Slight
    Chance Snow

Detailed Forecast

Tonight
A slight chance of rain before 4am, then a slight chance of rain after 5am. Cloudy, with a low around 33. Southeast wind 6 to 9 mph. Chance of precipitation is 20%.
Sunday
A slight chance of drizzle before 11am. Cloudy, with a temperature rising to near 36 by 9am, then falling to around 30 during the remainder of the day. South wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 24 mph.
Sunday Night
Mostly cloudy, with a low around 16. North wind 6 to 13 mph, with gusts as high as 21 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 30. Light and variable wind becoming south around 6 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 22. South wind 6 to 10 mph.
Tuesday
Partly sunny, with a high near 48.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
Partly sunny, with a high near 44.
Wednesday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 25.
Thursday
A 30 percent chance of snow, mainly before noon. Mostly cloudy, with a high near 36.
Thursday Night
Mostly cloudy, with a low around 17.
Friday
Partly sunny, with a high near 25.
Friday Night
Partly cloudy, with a low around 7.
Saturday
Mostly sunny, with a high near 21.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Dow IL
 39.04°N 90.27°W (Elev. 600 ft)
Last Update:
9:46 pm CST Dec 6, 2025
Forecast Valid:
9pm CST Dec 6, 2025-6pm CST Dec 13, 2025
 
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