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 with Haze

13°F

-11°C

Humidity 77%
Wind Speed N 15 mph
Barometer 30.52 in (1034.1 mb)
Dewpoint 7°F (-14°C)
Visibility 5.00 mi
Wind Chill-3°F (-19°C)
Last update 30 Jan 11:54 pm CST
Extended Forecast for

4 Miles SSW Hardin IL

  • Overnight

    Overnight: A chance of flurries before 2am. Partly cloudy, with a low around 5. Northwest wind around 11 mph, with gusts as high as 21 mph.

    Low: 5 °F

    Chance
    Flurries

  • Saturday

    Saturday: Sunny and cold, with a high near 19. Wind chill values as low as -10. Northwest wind 7 to 10 mph, with gusts as high as 22 mph.

    High: 19 °F

    Cold

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 3. Northwest wind around 6 mph becoming light and variable after midnight.

    Low: 3 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 28. South wind 5 to 8 mph.

    High: 28 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 20. South wind around 6 mph becoming west after midnight.

    Low: 20 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of snow before noon, then a chance of rain and snow. Cloudy, with a high near 35. Chance of precipitation is 30%.

    High: 35 °F

    Slight Chance
    Snow then
    Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of flurries before 2am. Partly cloudy, with a low around 5. Northwest wind around 11 mph, with gusts as high as 21 mph.
Saturday
Sunny and cold, with a high near 19. Wind chill values as low as -10. Northwest wind 7 to 10 mph, with gusts as high as 22 mph.
Saturday Night
Mostly clear, with a low around 3. Northwest wind around 6 mph becoming light and variable after midnight.
Sunday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 28. South wind 5 to 8 mph.
Sunday Night
Mostly cloudy, with a low around 20. South wind around 6 mph becoming west after midnight.
Monday
Mostly sunny, with a high near 36.
Monday Night
Mostly cloudy, with a low around 25.
Tuesday
A slight chance of snow before noon, then a chance of rain and snow. Cloudy, with a high near 35. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 22.
Wednesday
Mostly cloudy, with a high near 30.
Wednesday Night
Partly cloudy, with a low around 16.
Thursday
Mostly sunny, with a high near 35.
Thursday Night
Partly cloudy, with a low around 28.
Friday
Mostly sunny, with a high near 41.
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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:
9:26 pm CST Jan 30, 2026
Forecast Valid:
12am CST Jan 31, 2026-6pm CST Feb 6, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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