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

64°F

18°C

Humidity 75%
Wind Speed W 8 mph
Barometer 29.90 in (1012.0 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 3 Apr 12:54 am CDT
Extended Forecast for

3 Miles SSW Dow IL

  • Overnight

    Overnight: A 20 percent chance of showers. Mostly cloudy, with a low around 58. Northwest wind 3 to 5 mph.

    Low: 58 °F

    Slight Chance
    Showers

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Partly sunny, with a high near 80. East wind 5 to 10 mph becoming south 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 30%.

    High: 80 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 56. South wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.

    Low: 56 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 10am, then a chance of showers between 10am and 1pm. Mostly cloudy, with a temperature falling to around 55 by 1pm. West wind 11 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

    High: 59 °F⇓

    Showers
    Likely then
    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 38. Northwest wind 9 to 14 mph, with gusts as high as 23 mph.

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 39.

    Low: 39 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers. Mostly cloudy, with a low around 58. Northwest wind 3 to 5 mph.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Partly sunny, with a high near 80. East wind 5 to 10 mph becoming south 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 56. South wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.
Saturday
Showers likely and possibly a thunderstorm before 10am, then a chance of showers between 10am and 1pm. Mostly cloudy, with a temperature falling to around 55 by 1pm. West wind 11 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 38. Northwest wind 9 to 14 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 58.
Sunday Night
Clear, with a low around 39.
Monday
Sunny, with a high near 59.
Monday Night
Partly cloudy, with a low around 33.
Tuesday
Mostly sunny, with a high near 53.
Tuesday Night
Partly cloudy, with a low around 39.
Wednesday
Partly sunny, with a high near 70.
Wednesday Night
Partly cloudy, with a low around 52.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 75.
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:
1:26 am CDT Apr 3, 2026
Forecast Valid:
3am CDT Apr 3, 2026-6pm CDT Apr 9, 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