Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Partly Cloudy

73°F

23°C

Humidity 96%
Wind Speed SW 5 mph
Barometer 29.92 in (1012.8 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 19 Aug 5:54 am CDT
Extended Forecast for

2 Miles NNW Hardin IL

  • Today

    Today: Scattered showers and thunderstorms, mainly after 5pm.  Cloudy, with a high near 79. Calm wind.  Chance of precipitation is 40%.

    High: 79 °F

    Scattered
    Showers then
    Scattered
    T-storms

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly before 10pm.  Mostly cloudy, with a low around 66. Calm wind.  Chance of precipitation is 30%.

    Low: 66 °F

    Scattered
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 82. Light northeast wind.

    High: 82 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85. Light and variable wind.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms after 1am.  Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 1pm.  Mostly sunny, with a high near 84.

    High: 84 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

Detailed Forecast

Today
Scattered showers and thunderstorms, mainly after 5pm. Cloudy, with a high near 79. Calm wind. Chance of precipitation is 40%.
Tonight
Scattered showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 82. Light northeast wind.
Thursday Night
Mostly clear, with a low around 64. Calm wind.
Friday
Sunny, with a high near 85. Light and variable wind.
Friday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 66.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 84.
Saturday Night
Mostly clear, with a low around 64.
Sunday
Mostly sunny, with a high near 81.
Sunday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 63.
Monday
Partly sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Hardin IL
 39.18°N 90.63°W (Elev. 689 ft)
6:21 am CDT Aug 19, 2026
6am CDT Aug 19, 2026-6pm CDT Aug 25, 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