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.

Overcast

23°F

-5°C

Humidity 74%
Wind Speed NW 3 mph
Barometer 30.34 in (1027.9 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Last update 8 Dec 4:54 am CST
Extended Forecast for

3 Miles SSW Dow IL

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 32. North wind 5 to 7 mph becoming calm.

    High: 32 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Partly cloudy, with a temperature rising to around 31 by 5am. Southeast wind 6 to 10 mph becoming southwest after midnight.

    Low: 26 °F⇑

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 49. Southwest wind around 11 mph, with gusts as high as 20 mph.

    High: 49 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40. South wind 11 to 17 mph becoming west after midnight. Winds could gust as high as 30 mph.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a temperature falling to around 35 by 5pm. Breezy, with a northwest wind 11 to 20 mph, with gusts as high as 30 mph.

    High: 44 °F⇓

    Partly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 35.

    High: 35 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 30.

    High: 30 °F

    Partly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 32. North wind 5 to 7 mph becoming calm.
Tonight
Partly cloudy, with a temperature rising to around 31 by 5am. Southeast wind 6 to 10 mph becoming southwest after midnight.
Tuesday
Mostly sunny, with a high near 49. Southwest wind around 11 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 40. South wind 11 to 17 mph becoming west after midnight. Winds could gust as high as 30 mph.
Wednesday
Partly sunny, with a temperature falling to around 35 by 5pm. Breezy, with a northwest wind 11 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
Mostly cloudy, with a low around 25.
Thursday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 35.
Thursday Night
Mostly cloudy, with a low around 21.
Friday
Partly sunny, with a high near 30.
Friday Night
Mostly cloudy, with a low around 6.
Saturday
Partly sunny and cold, with a high near 18.
Saturday Night
Mostly cloudy, with a low around 8.
Sunday
Mostly sunny, with a high near 25.
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:
4:01 am CST Dec 8, 2025
Forecast Valid:
5am CST Dec 8, 2025-6pm CST Dec 14, 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