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

67°F

19°C

Humidity 27%
Wind Speed S 13 mph
Barometer 30.13 in (1020.0 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 13 Nov 2:54 pm CST
Extended Forecast for

3 Miles W Hardin IL

  • Tonight

    Tonight: Mostly clear, with a low around 49. South wind around 7 mph.

    Low: 49 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 75. Southwest wind 6 to 9 mph.

    High: 75 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 59. Southwest wind 5 to 8 mph.

    Low: 59 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 76. Southwest wind 7 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.

    High: 76 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41. North wind 5 to 8 mph.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of rain after noon. Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny
    then Chance
    Rain

  • Monday Night

    Monday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.

    Low: 44 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 49. South wind around 7 mph.
Friday
Mostly sunny, with a high near 75. Southwest wind 6 to 9 mph.
Friday Night
Partly cloudy, with a low around 59. Southwest wind 5 to 8 mph.
Saturday
Partly sunny, with a high near 76. Southwest wind 7 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
Mostly clear, with a low around 41. North wind 5 to 8 mph.
Sunday
Sunny, with a high near 58.
Sunday Night
Mostly clear, with a low around 38.
Monday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 56.
Monday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.
Tuesday
A 20 percent chance of rain before noon. Partly sunny, with a high near 58.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 42.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 56.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 46.
Thursday
Rain likely. Mostly cloudy, with a high near 57. Chance of precipitation is 60%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Hardin IL
 39.14°N 90.66°W (Elev. 604 ft)
Last Update:
3:16 pm CST Nov 13, 2025
Forecast Valid:
3pm CST Nov 13, 2025-6pm CST Nov 20, 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