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

57°F

14°C

Humidity 67%
Wind Speed SE 3 mph
Barometer 30.00 in (1015.4 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 30 Mar 5:54 am CDT
Extended Forecast for

4 Miles SSW Hardin IL

  • Today

    Today: Mostly sunny, with a high near 83. Breezy, with a southwest wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 33 mph.

    High: 83 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 64. South wind 9 to 13 mph, with gusts as high as 24 mph.

    Low: 64 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of rain and thunderstorms. Partly sunny, with a high near 82. Breezy, with a southwest wind 11 to 20 mph, with gusts as high as 38 mph.

    High: 82 °F

    Chance Rain
    and Breezy
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 54. Southwest wind around 10 mph becoming north after midnight. Chance of precipitation is 80%.

    Low: 54 °F

    Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. High near 70. East wind 8 to 10 mph. Chance of precipitation is 90%.

    High: 70 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 60. Chance of precipitation is 80%.

    Low: 60 °F

    Rain

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 73. Chance of precipitation is 90%.

    High: 73 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm before 1am, then a chance of rain. Mostly cloudy, with a low around 55. Chance of precipitation is 70%.

    Low: 55 °F

    Rain Likely

  • Friday

    Friday: A chance of rain and thunderstorms. Mostly cloudy, with a high near 77. Chance of precipitation is 40%.

    High: 77 °F

    Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 83. Breezy, with a southwest wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 33 mph.
Tonight
Partly cloudy, with a low around 64. South wind 9 to 13 mph, with gusts as high as 24 mph.
Tuesday
A 40 percent chance of rain and thunderstorms. Partly sunny, with a high near 82. Breezy, with a southwest wind 11 to 20 mph, with gusts as high as 38 mph.
Tuesday Night
Rain and possibly a thunderstorm. Low around 54. Southwest wind around 10 mph becoming north after midnight. Chance of precipitation is 80%.
Wednesday
Rain and possibly a thunderstorm. High near 70. East wind 8 to 10 mph. Chance of precipitation is 90%.
Wednesday Night
Rain and possibly a thunderstorm. Low around 60. Chance of precipitation is 80%.
Thursday
Rain and possibly a thunderstorm. High near 73. Chance of precipitation is 90%.
Thursday Night
Rain likely and possibly a thunderstorm before 1am, then a chance of rain. Mostly cloudy, with a low around 55. Chance of precipitation is 70%.
Friday
A chance of rain and thunderstorms. Mostly cloudy, with a high near 77. Chance of precipitation is 40%.
Friday Night
Rain likely, mainly after 1am. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.
Saturday
Rain and thunderstorms likely. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.
Saturday Night
A 40 percent chance of rain. Partly cloudy, with a low around 40.
Sunday
Mostly sunny, with a high near 57.
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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:
1:25 am CDT Mar 30, 2026
Forecast Valid:
6am CDT Mar 30, 2026-6pm CDT Apr 5, 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