Lala Approaching Hawaii; Flash Flooding Risks; Excessive Heat

Lala, may become a hurricane, is expected to impact Hawaii this weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians continues, with the threat shifting toward the mid-Atlantic later this weekend. Record heat continues for areas of the South. Read More >

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

A Few Clouds

77°F

25°C

Humidity 85%
Wind Speed SE 3 mph
Barometer 30.10 in (1018.7 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 15 Aug 9:54 am CDT
Extended Forecast for

4 Miles SW Hardin IL

Heat Advisory August 15, 10:18am until August 16, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 15, 10:18am until August 16, 09:00pm

    NOW until 9:00pm Sun

    Heat Advisory

  • Today

    High: 92 °F

    Chance
    T-storms then
    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 3am.  Partly cloudy, with a low around 76. Light and variable wind.

    Low: 76 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: A slight chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms after 4pm.  Partly sunny, with a high near 92. Heat index values as high as 106. Northwest wind 3 to 6 mph.  Chance of precipitation is 20%.

    High: 92 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am.  Partly cloudy, with a low around 70. North wind 3 to 6 mph.  Chance of precipitation is 30%.

    Low: 70 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 85. Light north wind.

    High: 85 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 73.

    Low: 73 °F

    Mostly Clear
    then Chance
    T-storms

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms, mainly before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 92. Heat index values as high as 106. Southeast wind around 6 mph becoming southwest in the afternoon.
Tonight
A 20 percent chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 76. Light and variable wind.
Sunday
A slight chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 92. Heat index values as high as 106. Northwest wind 3 to 6 mph. Chance of precipitation is 20%.
Sunday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 70. North wind 3 to 6 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 85. Light north wind.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
Sunny, with a high near 89.
Tuesday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73.
Wednesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Friday
Mostly sunny, with a high near 81.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Hardin IL
 39.1°N 90.67°W (Elev. 430 ft)
9:56 am CDT Aug 15, 2026
10am CDT Aug 15, 2026-6pm CDT Aug 21, 2026
 
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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