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

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fog

54°F

12°C

Humidity 100%
Wind Speed E 6 mph
Barometer 29.84 in (1010.4 mb)
Dewpoint 54°F (12°C)
Visibility 0.25 mi
Wind Chill52°F (11°C)
Last update 10 Mar 7:54 am CDT
Extended Forecast for

Hardin IL

  • Today

    Today: Sunny, with a high near 83. South wind 8 to 17 mph, with gusts as high as 28 mph.

    High: 83 °F

    Sunny

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Low around 49. South wind 13 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.

    Low: 49 °F

    Chance
    T-storms then
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 10am, then showers likely. Temperature falling to around 47 by 5pm. Southwest wind 11 to 18 mph becoming northwest in the morning. Winds could gust as high as 31 mph. Chance of precipitation is 100%.

    High: 61 °F⇓

    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming clear, with a low around 32. Northwest wind 6 to 14 mph, with gusts as high as 25 mph.

    Low: 32 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 54. Light and variable wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 60.

    High: 60 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 83. South wind 8 to 17 mph, with gusts as high as 28 mph.
Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Low around 49. South wind 13 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm before 10am, then showers likely. Temperature falling to around 47 by 5pm. Southwest wind 11 to 18 mph becoming northwest in the morning. Winds could gust as high as 31 mph. Chance of precipitation is 100%.
Wednesday Night
Mostly cloudy, then gradually becoming clear, with a low around 32. Northwest wind 6 to 14 mph, with gusts as high as 25 mph.
Thursday
Sunny, with a high near 54. Light and variable wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 45.
Friday
Mostly cloudy, with a high near 60.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Partly sunny, with a high near 67.
Saturday Night
A 20 percent chance of rain after 1am. Partly cloudy, with a low around 46.
Sunday
Rain likely. Cloudy, with a high near 59. Chance of precipitation is 70%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hardin IL
 39.16°N 90.64°W (Elev. 692 ft)
Last Update:
5:31 am CDT Mar 10, 2026
Forecast Valid:
8am CDT Mar 10, 2026-6pm CDT Mar 16, 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