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

64°F

18°C

Humidity 75%
Wind Speed E 6 mph
Barometer 30.06 in (1017.7 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 12 Apr 7:54 am CDT
Extended Forecast for

4 Miles SSW Hardin IL

  • Today

    Today: A 30 percent chance of showers, mainly after 4pm. Increasing clouds, with a high near 79. South wind 7 to 17 mph, with gusts as high as 31 mph.

    High: 79 °F

    Mostly Sunny
    then Chance
    Showers

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 64. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 64 °F

    Chance
    T-storms and
    Breezy

  • Monday

    Monday: A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm. Partly sunny, with a high near 84. South wind 9 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 68. Southwest wind around 14 mph, with gusts as high as 24 mph.

    Low: 68 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 85. Southwest wind 10 to 13 mph, with gusts as high as 26 mph.

    High: 85 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 80%.

    High: 79 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.

    Low: 63 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 30%.

    High: 81 °F

    Chance
    Showers

Detailed Forecast

Today
A 30 percent chance of showers, mainly after 4pm. Increasing clouds, with a high near 79. South wind 7 to 17 mph, with gusts as high as 31 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 64. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Monday
A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm. Partly sunny, with a high near 84. South wind 9 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Monday Night
Mostly cloudy, with a low around 68. Southwest wind around 14 mph, with gusts as high as 24 mph.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 85. Southwest wind 10 to 13 mph, with gusts as high as 26 mph.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Wednesday
Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 80%.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 30%.
Thursday Night
Mostly clear, with a low around 60.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Friday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 62. Chance of precipitation is 70%.
Saturday
Showers and thunderstorms likely. Partly sunny, with a high near 75. Chance of precipitation is 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:
8:01 am CDT Apr 12, 2026
Forecast Valid:
8am CDT Apr 12, 2026-6pm CDT Apr 18, 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