Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

51°F

11°C

Humidity 77%
Wind Speed E 10 mph
Barometer 29.60 in (1002.3 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 15 Mar 2:54 am CDT
Extended Forecast for

4 Miles SSW Hardin IL

Wind Advisory March 15, 10:00am until March 16, 12:00pm
Click here for hazard details and duration
Wind Advisory
  • Overnight

    Overnight: Mostly cloudy, with a low around 55. South wind around 14 mph, with gusts as high as 26 mph.

    Low: 55 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 2pm.  High near 66. South wind 16 to 18 mph becoming west in the afternoon. Winds could gust as high as 41 mph.  Chance of precipitation is 90%.

    High: 66 °F

    Chance
    T-storms then
    Rain

  • Sunday Night

    Sunday Night: A chance of rain before 9pm, then a chance of snow.  Mostly cloudy, with a low around 19. Breezy, with a northwest wind 24 to 26 mph, with gusts as high as 49 mph.  Chance of precipitation is 50%.

    Low: 19 °F

    Chance
    Rain/Snow and
    Breezy then
    Chance Snow
    and Blustery

  • Monday

    Monday: A 20 percent chance of snow before 1pm.  Partly sunny, with a high near 28. Blustery, with a northwest wind 18 to 24 mph, with gusts as high as 46 mph.

    High: 28 °F

    Slight Chance
    Snow and
    Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 12. Northwest wind 10 to 18 mph, with gusts as high as 29 mph.

    Low: 12 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow before 4am, then a chance of rain.  Mostly cloudy, with a low around 30. Chance of precipitation is 30%.

    Low: 30 °F

    Slight Chance
    Snow then
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A 30 percent chance of rain before 7am.  Mostly sunny, with a high near 61.

    High: 61 °F

    Chance Rain
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 55. South wind around 14 mph, with gusts as high as 26 mph.
Sunday
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 2pm. High near 66. South wind 16 to 18 mph becoming west in the afternoon. Winds could gust as high as 41 mph. Chance of precipitation is 90%.
Sunday Night
A chance of rain before 9pm, then a chance of snow. Mostly cloudy, with a low around 19. Breezy, with a northwest wind 24 to 26 mph, with gusts as high as 49 mph. Chance of precipitation is 50%.
Monday
A 20 percent chance of snow before 1pm. Partly sunny, with a high near 28. Blustery, with a northwest wind 18 to 24 mph, with gusts as high as 46 mph.
Monday Night
Mostly clear, with a low around 12. Northwest wind 10 to 18 mph, with gusts as high as 29 mph.
Tuesday
Mostly sunny, with a high near 36.
Tuesday Night
A chance of snow before 4am, then a chance of rain. Mostly cloudy, with a low around 30. Chance of precipitation is 30%.
Wednesday
A 30 percent chance of rain before 7am. Mostly sunny, with a high near 61.
Wednesday Night
Partly cloudy, with a low around 42.
Thursday
Mostly sunny, with a high near 70.
Thursday Night
Mostly clear, with a low around 44.
Friday
Mostly sunny, with a high near 74.
Friday Night
Mostly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 67.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Hardin IL
 39.1°N 90.64°W (Elev. 758 ft)
2:11 am CDT Mar 15, 2026
3am CDT Mar 15, 2026-6pm CDT Mar 21, 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