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

49°F

9°C

Humidity 71%
Wind Speed NW 9 mph
Barometer 29.91 in (1012.3 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 18 Apr 6:54 am CDT
Extended Forecast for

3 Miles SSW Dow IL

  • Today

    Today: A 20 percent chance of showers before 8am. Cloudy through mid morning, then gradual clearing, with a high near 56. Northwest wind around 17 mph, with gusts as high as 26 mph.

    High: 56 °F

    Slight Chance
    Showers then
    Sunny

  • Tonight

    Tonight: Clear, with a low around 39. West wind 6 to 14 mph, with gusts as high as 21 mph.

    Low: 39 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 66. West wind 6 to 16 mph, with gusts as high as 26 mph.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. Northwest wind 6 to 10 mph becoming east after midnight.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 66. East wind 6 to 9 mph becoming south in the afternoon.

    High: 66 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 57.

    Low: 57 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

Detailed Forecast

Today
A 20 percent chance of showers before 8am. Cloudy through mid morning, then gradual clearing, with a high near 56. Northwest wind around 17 mph, with gusts as high as 26 mph.
Tonight
Clear, with a low around 39. West wind 6 to 14 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 66. West wind 6 to 16 mph, with gusts as high as 26 mph.
Sunday Night
Mostly clear, with a low around 39. Northwest wind 6 to 10 mph becoming east after midnight.
Monday
Sunny, with a high near 66. East wind 6 to 9 mph becoming south in the afternoon.
Monday Night
Mostly clear, with a low around 50.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 57.
Wednesday
Sunny, with a high near 80.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Friday
Showers and thunderstorms likely. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.
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:
5:41 am CDT Apr 18, 2026
Forecast Valid:
7am CDT Apr 18, 2026-6pm CDT Apr 24, 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