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.

Thunderstorm in Vicinity Rain Fog/Mist

60°F

16°C

Humidity 93%
Wind Speed W 5 mph
Barometer 29.89 in (1011.6 mb)
Dewpoint 58°F (14°C)
Visibility 4.00 mi
Last update 7 Mar 4:54 am CST
Extended Forecast for

4 Miles SSW Hardin IL

  • Overnight

    Overnight: Rain and possibly a thunderstorm. Low around 60. South wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.

    Low: 60 °F

    Rain

  • Saturday

    Saturday: Rain, mainly before 9am. Temperature falling to around 52 by 4pm. South wind 9 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 80%.

    High: 62 °F⇓

    Rain then
    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming clear, with a low around 36. Northwest wind 5 to 9 mph becoming southwest after midnight.

    Low: 36 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 65. Southwest wind 6 to 9 mph.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 47. South wind 7 to 9 mph.

    Low: 47 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: A 30 percent chance of rain after midnight. Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear
    then Chance
    Rain

  • Tuesday

    Tuesday: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after noon. High near 78. Chance of precipitation is 80%.

    High: 78 °F

    Chance Rain
    then Rain

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 48. Chance of precipitation is 90%.

    Low: 48 °F

    Rain

Detailed Forecast

Overnight
Rain and possibly a thunderstorm. Low around 60. South wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.
Saturday
Rain, mainly before 9am. Temperature falling to around 52 by 4pm. South wind 9 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 80%.
Saturday Night
Mostly cloudy, then gradually becoming clear, with a low around 36. Northwest wind 5 to 9 mph becoming southwest after midnight.
Sunday
Sunny, with a high near 65. Southwest wind 6 to 9 mph.
Sunday Night
Clear, with a low around 47. South wind 7 to 9 mph.
Monday
Sunny, with a high near 77.
Monday Night
A 30 percent chance of rain after midnight. Mostly clear, with a low around 58.
Tuesday
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after noon. High near 78. Chance of precipitation is 80%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 48. Chance of precipitation is 90%.
Wednesday
Rain and possibly a thunderstorm before noon, then a chance of rain. High near 61. Chance of precipitation is 80%.
Wednesday Night
Partly cloudy, with a low around 33.
Thursday
Mostly sunny, with a high near 53.
Thursday Night
Mostly cloudy, with a low around 41.
Friday
Partly sunny, with a high near 65.
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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:
3:31 am CST Mar 7, 2026
Forecast Valid:
5am CST Mar 7, 2026-6pm CDT Mar 13, 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