Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Mostly Cloudy

69°F

21°C

Humidity 36%
Wind Speed S 12 mph
Barometer 30.03 in (1016.9 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 19 Mar 12:54 pm CDT
Extended Forecast for

4 Miles SSW Hardin IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 74. Southwest wind around 6 mph.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 48. Light south wind.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 80. Southwest wind 5 to 13 mph.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 50. North wind around 5 mph becoming calm  after midnight.

    Low: 50 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 79. Light and variable wind becoming south around 5 mph in the afternoon.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 59.

    Low: 59 °F

    Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 74. Southwest wind around 6 mph.
Tonight
Mostly clear, with a low around 48. Light south wind.
Friday
Sunny, with a high near 80. Southwest wind 5 to 13 mph.
Friday Night
Partly cloudy, with a low around 50. North wind around 5 mph becoming calm after midnight.
Saturday
Sunny, with a high near 79. Light and variable wind becoming south around 5 mph in the afternoon.
Saturday Night
Clear, with a low around 59.
Sunday
Mostly sunny, with a high near 82.
Sunday Night
Partly cloudy, with a low around 40.
Monday
Mostly sunny, with a high near 56.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Mostly cloudy, with a high near 59.
Tuesday Night
Mostly cloudy, with a low around 43.
Wednesday
Partly sunny, with a high near 69.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Hardin IL
 39.1°N 90.64°W (Elev. 758 ft)
1:26 pm CDT Mar 19, 2026
1pm CDT Mar 19, 2026-6pm CDT Mar 25, 2026
 
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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