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

68°F

20°C

Humidity 90%
Wind Speed Calm
Barometer 30.00 in (1015.5 mb)
Dewpoint 65°F (18°C)
Visibility 9.00 mi
Last update 20 Jun 5:54 am CDT
Extended Forecast for

2 Miles S Hardin IL

Flood Warning until further notice
Flood Watch June 21, 01:00am until June 21, 07:00pm
Click here for hazard details and duration
Flood Warning until further notice
Flood Watch
  •  
    Flood Warning until further notice

    NOW until further notice

    Flood Warning

  • Today

    High: 84 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 66. Light and variable wind becoming east around 5 mph after midnight.

    Low: 66 °F

    Partly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms. Some of the storms could produce heavy rainfall. High near 81. Southeast wind 7 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 100%.

    High: 81 °F

    Heavy Rain

  • Sunday Night

    Sunday Night: Showers and thunderstorms, mainly before 1am. Low around 62. Southwest wind 6 to 8 mph becoming north after midnight. Chance of precipitation is 80%.

    Low: 62 °F

    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 77. North wind around 8 mph.

    High: 77 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 84. Light northwest wind.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 66. Light and variable wind becoming east around 5 mph after midnight.
Sunday
Showers and thunderstorms. Some of the storms could produce heavy rainfall. High near 81. Southeast wind 7 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 100%.
Sunday Night
Showers and thunderstorms, mainly before 1am. Low around 62. Southwest wind 6 to 8 mph becoming north after midnight. Chance of precipitation is 80%.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 77. North wind around 8 mph.
Monday Night
Partly cloudy, with a low around 59.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Mostly sunny, with a high near 82.
Wednesday Night
Partly cloudy, with a low around 61.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Hardin IL
 39.12°N 90.61°W (Elev. 420 ft)
Last Update:
5:36 am CDT Jun 20, 2026
Forecast Valid:
6am CDT Jun 20, 2026-6pm CDT Jun 26, 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