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.

Light Rain

63°F

17°C

Humidity 90%
Wind Speed SW 12 mph
Barometer 29.77 in (1007.8 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 18 Apr 12:54 am CDT
Extended Forecast for

3 Miles WNW Carrollton IL

Flood Watch until April 18, 04:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until April 18, 04:00am

    NOW until 4:00am Sat

    Flood Watch

  • Overnight

    Low: 44 °F

    Showers

  • Saturday

    Saturday: A 30 percent chance of showers, mainly before 7am. Mostly cloudy through mid morning, then gradual clearing, with a high near 56. Northwest wind 16 to 18 mph, with gusts as high as 26 mph.

    High: 56 °F

    Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38. Northwest wind 6 to 11 mph becoming southwest after midnight. Winds could gust as high as 21 mph.

    Low: 38 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 64. West wind 6 to 16 mph, with gusts as high as 26 mph.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36. North wind 5 to 9 mph becoming east after midnight.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

Overnight
Showers, mainly before 4am. Low around 44. Northwest wind 11 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 90%.
Saturday
A 30 percent chance of showers, mainly before 7am. Mostly cloudy through mid morning, then gradual clearing, with a high near 56. Northwest wind 16 to 18 mph, with gusts as high as 26 mph.
Saturday Night
Mostly clear, with a low around 38. Northwest wind 6 to 11 mph becoming southwest after midnight. Winds could gust as high as 21 mph.
Sunday
Sunny, with a high near 64. West wind 6 to 16 mph, with gusts as high as 26 mph.
Sunday Night
Mostly clear, with a low around 36. North wind 5 to 9 mph becoming east after midnight.
Monday
Sunny, with a high near 65.
Monday Night
Mostly clear, with a low around 48.
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 56.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.
Friday
Showers and thunderstorms likely. Mostly cloudy, with a high near 76. Chance of precipitation is 70%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Carrollton IL
 39.29°N 90.46°W (Elev. 607 ft)
Last Update:
1:26 am CDT Apr 18, 2026
Forecast Valid:
1am 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