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.

Overcast

27°F

-3°C

Humidity 58%
Wind Speed S 8 mph
Barometer 30.18 in (1022.6 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 1 Feb 4:54 pm CST
Extended Forecast for

4 Miles SSW Hardin IL

  • This Afternoon

    This Afternoon: A 30 percent chance of snow. Mostly cloudy, with a high near 25. South wind around 8 mph.

    High: 25 °F

    Chance Snow

  • Tonight

    Tonight: A slight chance of snow before 8pm, then a chance of flurries between 8pm and 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 20. South wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 20%.

    Low: 20 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 35. Light northwest wind.

    High: 35 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 24. Calm wind becoming northeast around 6 mph after midnight.

    Low: 24 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 31. North wind around 6 mph.

    High: 31 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 17.

    Low: 17 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 29.

    High: 29 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of snow. Mostly cloudy, with a high near 25. South wind around 8 mph.
Tonight
A slight chance of snow before 8pm, then a chance of flurries between 8pm and 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 20. South wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Monday
Partly sunny, with a high near 35. Light northwest wind.
Monday Night
Mostly cloudy, with a low around 24. Calm wind becoming northeast around 6 mph after midnight.
Tuesday
Mostly cloudy, with a high near 31. North wind around 6 mph.
Tuesday Night
Mostly cloudy, with a low around 17.
Wednesday
Mostly sunny, with a high near 29.
Wednesday Night
Partly cloudy, with a low around 16.
Thursday
Partly sunny, with a high near 40.
Thursday Night
Mostly clear, with a low around 33.
Friday
Mostly sunny, with a high near 44.
Friday Night
Partly cloudy, with a low around 21.
Saturday
Sunny, with a high near 35.
Saturday Night
Partly cloudy, with a low around 25.
Sunday
Mostly sunny, with a high near 40.
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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:
4:41 pm CST Feb 1, 2026
Forecast Valid:
5pm CST Feb 1, 2026-6pm CST Feb 8, 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