National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Tropical Storm Edouard Impacting the Northwestern Gulf Coast; Hazardous Heat expands in the East

Tropical Storm Edouard will impact the northwestern Gulf Coast through Wednesday with gusty winds, storm surge, and heavy rainfall. Flash and river flooding will be possible, especially in southeastern Texas. Hazardous heat will expand across the central and eastern U.S. by mid-week, and daily chances for severe thunderstorms are expected from the eastern Great Lakes to the Mid-Atlantic this week. Read More >

Hazardous Weather Conditions

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

75°F

24°C

Humidity 90%
Wind Speed Calm
Barometer 29.99 in (1015.0 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 2 Sep 12:54 am CDT
Extended Forecast for

3 Miles WSW Hardin IL

Heat Advisory September 2, 01:14am until September 5, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 2, 01:14am until September 5, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Overnight

    Low: 75 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 96. Heat index values as high as 102. Southwest wind 5 to 7 mph.

    High: 96 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77. Calm wind becoming south around 5 mph after midnight.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 96. Heat index values as high as 102. Southwest wind 3 to 6 mph.

    High: 96 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 77. Calm wind becoming south around 5 mph.

    Low: 77 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95.

    High: 95 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 75. South wind around 6 mph.
Wednesday
Sunny, with a high near 96. Heat index values as high as 102. Southwest wind 5 to 7 mph.
Wednesday Night
Mostly clear, with a low around 77. Calm wind becoming south around 5 mph after midnight.
Thursday
Sunny, with a high near 96. Heat index values as high as 102. Southwest wind 3 to 6 mph.
Thursday Night
Mostly clear, with a low around 77. Calm wind becoming south around 5 mph.
Friday
Sunny, with a high near 95.
Friday Night
Mostly clear, with a low around 75.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95.
Saturday Night
Partly cloudy, with a low around 72.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Labor Day
Mostly sunny, with a high near 89.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
Mostly sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Hardin IL
 39.14°N 90.66°W (Elev. 604 ft)
Last Update:
10:26 pm CDT Sep 1, 2026
Forecast Valid:
1am CDT Sep 2, 2026-6pm CDT Sep 8, 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