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/Mist

39°F

4°C

Humidity 93%
Wind Speed E 9 mph
Barometer 30.13 in (1020.6 mb)
Dewpoint 37°F (3°C)
Visibility 4.00 mi
Wind Chill33°F (1°C)
Last update 3 Mar 12:54 am CST
Extended Forecast for

4 Miles SW Hardin IL

  • Overnight

    Overnight: A chance of showers, then showers and possibly a thunderstorm after 3am. Patchy fog. Low around 38. East wind 3 to 5 mph. Chance of precipitation is 100%.

    Low: 38 °F

    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. Patchy fog before noon. High near 53. Light and variable wind becoming northeast around 6 mph in the afternoon. Chance of precipitation is 100%.

    High: 53 °F

    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Patchy fog between 8pm and 11pm. Low around 46. Northeast wind 5 to 7 mph. Chance of precipitation is 90%.

    Low: 46 °F

    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before noon, then showers between noon and 3pm, then showers and possibly a thunderstorm after 3pm. Patchy fog between 8am and 11am. High near 60. Southeast wind around 6 mph becoming light and variable in the afternoon. Chance of precipitation is 90%.

    High: 60 °F

    Showers and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 51. Light and variable wind becoming south around 5 mph after midnight. Chance of precipitation is 90%.

    Low: 51 °F

    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before noon, then a slight chance of showers. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.

    High: 66 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: Showers likely, with thunderstorms also possible after 3am. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.

    Low: 55 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm before noon, then a chance of showers. Partly sunny, with a high near 78. Chance of precipitation is 60%.

    High: 78 °F

    Showers
    Likely then
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 56. Chance of precipitation is 90%.

    Low: 56 °F

    Chance
    Showers then
    Showers

Detailed Forecast

Overnight
A chance of showers, then showers and possibly a thunderstorm after 3am. Patchy fog. Low around 38. East wind 3 to 5 mph. Chance of precipitation is 100%.
Tuesday
Showers and possibly a thunderstorm. Patchy fog before noon. High near 53. Light and variable wind becoming northeast around 6 mph in the afternoon. Chance of precipitation is 100%.
Tuesday Night
Showers and possibly a thunderstorm. Patchy fog between 8pm and 11pm. Low around 46. Northeast wind 5 to 7 mph. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm before noon, then showers between noon and 3pm, then showers and possibly a thunderstorm after 3pm. Patchy fog between 8am and 11am. High near 60. Southeast wind around 6 mph becoming light and variable in the afternoon. Chance of precipitation is 90%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 51. Light and variable wind becoming south around 5 mph after midnight. Chance of precipitation is 90%.
Thursday
Showers likely and possibly a thunderstorm before noon, then a slight chance of showers. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.
Thursday Night
Showers likely, with thunderstorms also possible after 3am. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm before noon, then a chance of showers. Partly sunny, with a high near 78. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 56. Chance of precipitation is 90%.
Saturday
A 50 percent chance of showers and thunderstorms, mainly before noon. Mostly cloudy, with a high near 67.
Saturday Night
Mostly cloudy, with a low around 42.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 47.
Monday
A 20 percent chance of showers. Sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Hardin IL
 39.1°N 90.67°W (Elev. 430 ft)
Last Update:
12:26 am CST Mar 3, 2026
Forecast Valid:
1am CST Mar 3, 2026-6pm CDT Mar 9, 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