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.

Mostly Cloudy

79°F

26°C

Humidity 77%
Wind Speed SW 5 mph
Barometer 29.88 in (1011.2 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 17 Jun 9:54 am CDT
Extended Forecast for

3 Miles WSW Hardin IL

  • Today

    Today: Sunny, with a high near 88. Light southwest wind.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 71. Light and variable wind becoming south around 6 mph in the evening.

    Low: 71 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms after 4pm. High near 81. Southwest wind 7 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.

    High: 81 °F

    Showers
    Likely then
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Low around 66. Southwest wind 5 to 9 mph becoming light west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%.

    Low: 66 °F

    T-storms then
    Slight Chance
    Showers

  • Juneteenth

    Juneteenth: Sunny, with a high near 84. West wind 3 to 5 mph.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 88. Light southwest wind.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 71. Light and variable wind becoming south around 6 mph in the evening.
Wednesday
Showers and thunderstorms likely before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms after 4pm. High near 81. Southwest wind 7 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.
Wednesday Night
Showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Low around 66. Southwest wind 5 to 9 mph becoming light west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%.
Juneteenth
Sunny, with a high near 84. West wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 67.
Friday
Sunny, with a high near 90.
Friday Night
Mostly clear, with a low around 75.
Saturday
Sunny, with a high near 94.
Saturday Night
Clear, with a low around 76.
Sunday
Sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny, with a high near 93.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Hardin IL
 39.14°N 90.66°W (Elev. 604 ft)
Last Update:
9:07 am CDT Jun 17, 2025
Forecast Valid:
10am CDT Jun 17, 2025-6pm CDT Jun 23, 2025
 
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