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.

Fair

69°F

21°C

Humidity 61%
Wind Speed SW 13 mph
Barometer 29.88 in (1011.2 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 31 Mar 4:54 am CDT
Extended Forecast for

4 Miles SSW Hardin IL

  • Today

    Today: A 30 percent chance of rain and thunderstorms, mainly after 2pm. Partly sunny, with a high near 82. Southwest wind 10 to 16 mph, with gusts as high as 32 mph.

    High: 82 °F

    Chance
    T-storms

  • Tonight

    Tonight: Rain and possibly a thunderstorm, mainly before 5am, then a chance of rain and thunderstorms after 5am. Low around 54. Southwest wind 6 to 9 mph becoming north after midnight. Chance of precipitation is 90%.

    Low: 54 °F

    Rain

  • Wednesday

    Wednesday: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 7am. High near 68. East wind 7 to 9 mph becoming southeast in the afternoon. Chance of precipitation is 100%.

    High: 68 °F

    Rain

  • Wednesday Night

    Wednesday Night: A chance of rain and thunderstorms before 10pm, then a chance of rain between 10pm and 1am, then rain likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 62. Southeast wind 9 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    Low: 62 °F

    Rain Likely

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 75. South wind 14 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 90%.

    High: 75 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm. Partly cloudy, with a low around 57. Chance of precipitation is 60%.

    Low: 57 °F

    Rain Likely

  • Friday

    Friday: A chance of rain, with thunderstorms also possible after 1pm. Partly sunny, with a high near 79. Chance of precipitation is 40%.

    High: 79 °F

    Chance Rain
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1am. Low around 56. Chance of precipitation is 80%.

    Low: 56 °F

    Chance
    T-storms then
    Rain

  • Saturday

    Saturday: Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 65. Chance of precipitation is 70%.

    High: 65 °F

    Rain Likely

Detailed Forecast

Today
A 30 percent chance of rain and thunderstorms, mainly after 2pm. Partly sunny, with a high near 82. Southwest wind 10 to 16 mph, with gusts as high as 32 mph.
Tonight
Rain and possibly a thunderstorm, mainly before 5am, then a chance of rain and thunderstorms after 5am. Low around 54. Southwest wind 6 to 9 mph becoming north after midnight. Chance of precipitation is 90%.
Wednesday
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 7am. High near 68. East wind 7 to 9 mph becoming southeast in the afternoon. Chance of precipitation is 100%.
Wednesday Night
A chance of rain and thunderstorms before 10pm, then a chance of rain between 10pm and 1am, then rain likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 62. Southeast wind 9 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Thursday
Rain and possibly a thunderstorm. High near 75. South wind 14 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 90%.
Thursday Night
Rain likely and possibly a thunderstorm. Partly cloudy, with a low around 57. Chance of precipitation is 60%.
Friday
A chance of rain, with thunderstorms also possible after 1pm. Partly sunny, with a high near 79. Chance of precipitation is 40%.
Friday Night
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1am. Low around 56. Chance of precipitation is 80%.
Saturday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 65. Chance of precipitation is 70%.
Saturday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 38.
Sunday
A 20 percent chance of rain. Mostly sunny, with a high near 55.
Sunday Night
Mostly clear, with a low around 35.
Monday
Sunny, with a high near 60.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Hardin IL
 39.1°N 90.64°W (Elev. 758 ft)
Last Update:
4:16 am CDT Mar 31, 2026
Forecast Valid:
5am CDT Mar 31, 2026-6pm CDT Apr 6, 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