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.

Partly Cloudy

69°F

21°C

Humidity 70%
Wind Speed E 5 mph
Barometer 29.91 in (1012.1 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 21 Jun 3:54 am CDT
Extended Forecast for

3 Miles WNW Carrollton IL

Flood Watch June 21, 07:00am until June 22, 01:00am
Click here for hazard details and duration
Flood Watch

  • Overnight

    Overnight: Mostly cloudy, with a low around 66. East wind around 5 mph.

    Low: 66 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers and thunderstorms. High near 78. East wind 10 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%.

    High: 78 °F

    T-storms

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely, mainly before midnight. Mostly cloudy, with a low around 58. Southwest wind 8 to 10 mph becoming north after midnight. Chance of precipitation is 70%.

    Low: 58 °F

    T-storms
    Likely then
    Slight Chance
    T-storms

  • Monday

    Monday: Mostly cloudy, with a high near 74. North wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 74 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 56. North wind around 6 mph becoming calm in the evening.

    Low: 56 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 82.

    High: 82 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 66. East wind around 5 mph.
Sunday
Showers and thunderstorms. High near 78. East wind 10 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%.
Sunday Night
Showers and thunderstorms likely, mainly before midnight. Mostly cloudy, with a low around 58. Southwest wind 8 to 10 mph becoming north after midnight. Chance of precipitation is 70%.
Monday
Mostly cloudy, with a high near 74. North wind 9 to 11 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 56. North wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 59.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 82.
Wednesday Night
Partly cloudy, with a low around 61.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 59.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
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:
3:11 am CDT Jun 21, 2026
Forecast Valid:
4am CDT Jun 21, 2026-6pm CDT Jun 27, 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