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

59°F

15°C

Humidity 28%
Wind Speed S 9 G 16 mph
Barometer 30.13 in (1020.2 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 13 Feb 12:54 pm CST
Extended Forecast for

4 Miles SSW Hardin IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 58. South wind 5 to 9 mph.

    High: 58 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 38. South wind around 5 mph becoming calm in the evening.

    Low: 38 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Rain, mainly after 10am. High near 49. Calm wind becoming east 5 to 7 mph in the morning. Chance of precipitation is 90%.

    High: 49 °F

    Rain Likely
    then Rain

  • Saturday Night

    Saturday Night: Rain, mainly before 2am. Low around 43. East wind around 7 mph. Chance of precipitation is 90%.

    Low: 43 °F

    Rain then
    Rain Likely

  • Sunday

    Sunday: Mostly sunny, with a high near 56. Northeast wind 5 to 7 mph.

    High: 56 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 63.

    High: 63 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 58. South wind 5 to 9 mph.
Tonight
Increasing clouds, with a low around 38. South wind around 5 mph becoming calm in the evening.
Saturday
Rain, mainly after 10am. High near 49. Calm wind becoming east 5 to 7 mph in the morning. Chance of precipitation is 90%.
Saturday Night
Rain, mainly before 2am. Low around 43. East wind around 7 mph. Chance of precipitation is 90%.
Sunday
Mostly sunny, with a high near 56. Northeast wind 5 to 7 mph.
Sunday Night
Mostly clear, with a low around 37.
Washington's Birthday
Mostly sunny, with a high near 60.
Monday Night
Mostly cloudy, with a low around 44.
Tuesday
Mostly cloudy, with a high near 63.
Tuesday Night
Mostly cloudy, with a low around 54.
Wednesday
A 20 percent chance of rain. Partly sunny, with a high near 68.
Wednesday Night
A 20 percent chance of rain. Partly cloudy, with a low around 45.
Thursday
A 20 percent chance of rain. Sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

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 13, 2026
Forecast Valid:
12pm CST Feb 13, 2026-6pm CST Feb 19, 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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation