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.

Fair

58°F

14°C

Humidity 41%
Wind Speed W 12 mph
Barometer 30.24 in (1023.8 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 19 Apr 10:54 am CDT
Extended Forecast for

5 Miles WSW Hardin IL

Flood Warning until further notice
Click here for hazard details and duration
Flood Warning until further notice
  •  
    Flood Warning until further notice

    NOW until further notice

    Flood Warning

  • Today

    High: 65 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 39. North wind around 6 mph becoming calm after midnight.

    Low: 39 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 67. Calm wind becoming south 5 to 7 mph in the morning.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 51. Southeast wind around 6 mph.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78. Southwest wind 6 to 13 mph, with gusts as high as 25 mph.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Today
Sunny, with a high near 65. West wind 11 to 15 mph, with gusts as high as 29 mph.
Tonight
Partly cloudy, with a low around 39. North wind around 6 mph becoming calm after midnight.
Monday
Sunny, with a high near 67. Calm wind becoming south 5 to 7 mph in the morning.
Monday Night
Mostly clear, with a low around 51. Southeast wind around 6 mph.
Tuesday
Sunny, with a high near 78. Southwest wind 6 to 13 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 61. Chance of precipitation is 70%.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 73. Chance of precipitation is 70%.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 48.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 68.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Hardin IL
 39.12°N 90.69°W (Elev. 430 ft)
Last Update:
7:36 am CDT Apr 19, 2026
Forecast Valid:
11am CDT Apr 19, 2026-6pm CDT Apr 25, 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