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

54°F

12°C

Humidity 72%
Wind Speed N 9 mph
Barometer 29.76 in (1007.5 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 5 May 5:54 am CDT
Extended Forecast for

Hardin ILSimilar City Names

Flood Warning May 5, 06:45am until May 8, 07:00pm
Click here for hazard details and duration
Flood Warning
  •  
    Flood Warning May 5, 06:45am until May 8, 07:00pm

    NOW until 7:00pm Fri

    Flood Warning

  • Today

    High: 55 °F

    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 10pm, then a chance of showers between 10pm and 2am. Low around 44. North wind 6 to 9 mph. Chance of precipitation is 90%.

    Low: 44 °F

    Showers then
    Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers. Partly sunny, with a high near 59. North wind 5 to 8 mph.

    High: 59 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 39. North wind around 6 mph becoming calm in the evening.

    Low: 39 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 65. Calm wind becoming west 5 to 8 mph in the morning.

    High: 65 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers

Detailed Forecast

Today
Showers, with thunderstorms also possible after 4pm. High near 55. North wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 100%.
Tonight
Showers and possibly a thunderstorm before 10pm, then a chance of showers between 10pm and 2am. Low around 44. North wind 6 to 9 mph. Chance of precipitation is 90%.
Wednesday
A 20 percent chance of showers. Partly sunny, with a high near 59. North wind 5 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 39. North wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 65. Calm wind becoming west 5 to 8 mph in the morning.
Thursday Night
Mostly clear, with a low around 46.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 74.
Friday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 50.
Saturday
Sunny, with a high near 77.
Saturday Night
A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 56. Chance of precipitation is 50%.
Sunday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 73. Chance of precipitation is 60%.
Sunday Night
A 30 percent chance of showers. Partly cloudy, with a low around 48.
Monday
Sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hardin ILSimilar City Names
 39.14°N 90.61°W (Elev. 427 ft)
Last Update:
6:01 am CDT May 5, 2026
Forecast Valid:
6am CDT May 5, 2026-6pm CDT May 11, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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