National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

53°F

12°C

Humidity 48%
Wind Speed Vrbl 7 mph
Barometer 29.88 in (1011.8 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 26 Feb 11:54 am CST
Extended Forecast for

4 Miles SSW Hardin IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 54. Light and variable wind.

    High: 54 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 36. Calm wind becoming southwest around 5 mph after midnight.

    Low: 36 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 69. Southwest wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 69 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 38. Southwest wind 6 to 8 mph becoming northeast after midnight.

    Low: 38 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of rain after noon. Mostly sunny, with a high near 58. East wind 6 to 9 mph.

    High: 58 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of rain and snow after noon. Mostly cloudy, with a high near 39. Chance of precipitation is 50%.

    High: 39 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Rain and snow, mainly before midnight. Low around 27. Chance of precipitation is 80%.

    Low: 27 °F

    Rain/Snow
    then Chance
    Rain/Snow

  • Monday

    Monday: A slight chance of rain and snow before noon. Mostly cloudy, with a high near 39. Chance of precipitation is 20%.

    High: 39 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 54. Light and variable wind.
Tonight
Clear, with a low around 36. Calm wind becoming southwest around 5 mph after midnight.
Friday
Sunny, with a high near 69. Southwest wind 6 to 14 mph, with gusts as high as 22 mph.
Friday Night
Mostly clear, with a low around 38. Southwest wind 6 to 8 mph becoming northeast after midnight.
Saturday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 58. East wind 6 to 9 mph.
Saturday Night
Partly cloudy, with a low around 27.
Sunday
A chance of rain and snow after noon. Mostly cloudy, with a high near 39. Chance of precipitation is 50%.
Sunday Night
Rain and snow, mainly before midnight. Low around 27. Chance of precipitation is 80%.
Monday
A slight chance of rain and snow before noon. Mostly cloudy, with a high near 39. Chance of precipitation is 20%.
Monday Night
A 40 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 30.
Tuesday
Rain likely. Cloudy, with a high near 43. Chance of precipitation is 60%.
Tuesday Night
Rain likely. Cloudy, with a low around 35. Chance of precipitation is 60%.
Wednesday
Rain likely. Cloudy, with a high near 52. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Hardin IL
 39.1°N 90.64°W (Elev. 758 ft)
Last Update:
12:26 pm CST Feb 26, 2026
Forecast Valid:
12pm CST Feb 26, 2026-6pm CST Mar 4, 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