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

77°F

25°C

Humidity 58%
Wind Speed N 7 mph
Barometer 30.01 in (1015.9 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 20 Jun 9:54 am CDT
Extended Forecast for

3 Miles SSE Carrollton IL

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

  • Today

    Today: Mostly sunny, with a high near 83. Northwest wind 3 to 6 mph.

    High: 83 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 64. Light and variable wind becoming east around 6 mph after midnight.

    Low: 64 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers and thunderstorms. Some of the storms could produce heavy rainfall. High near 80. East wind 8 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 100%.

    High: 80 °F

    Heavy Rain

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 59. Southwest wind 7 to 9 mph becoming north after midnight. Chance of precipitation is 70%.

    Low: 59 °F

    T-storms
    Likely

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 76. North wind around 9 mph.

    High: 76 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 56.

    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: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 83. Northwest wind 3 to 6 mph.
Tonight
Mostly cloudy, with a low around 64. Light and variable wind becoming east around 6 mph after midnight.
Sunday
Showers and thunderstorms. Some of the storms could produce heavy rainfall. High near 80. East wind 8 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 100%.
Sunday Night
Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 59. Southwest wind 7 to 9 mph becoming north after midnight. Chance of precipitation is 70%.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 76. North wind around 9 mph.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 59.
Wednesday
Mostly sunny, with a high near 81.
Wednesday Night
Partly cloudy, with a low around 59.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Carrollton IL
 39.24°N 90.38°W (Elev. 466 ft)
Last Update:
9:41 am CDT Jun 20, 2026
Forecast Valid:
10am CDT Jun 20, 2026-6pm CDT Jun 26, 2026
 
Forecast Discussion
 
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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