Severe Thunderstorms and Heavy Rain in the Mid-Atlantic; Heat Persists Across the South

Scattered severe thunderstorms and excessive rainfall are possible into the night in the Mid Atlantic, and heavy rain will shift to Virginia and the Carolinas on Friday. Severe thunderstorms are also possible in the Central Plains into the Upper MS Valley and the Deep South tonight. Dangerous heat persists across the Southern Plains and Lower MS Valley and heat will expand into the Southwest. Read More >

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

72°F

22°C

Humidity 87%
Wind Speed NE 3 mph
Barometer 30.05 in (1017.2 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 20 Aug 9:54 pm CDT
Extended Forecast for

5 Miles W Dow IL

  • Tonight

    Tonight: Patchy fog after 3am.  Otherwise, mostly clear, with a low around 62. Light northeast wind.

    Low: 62 °F

    Clear then
    Patchy Fog

  • Friday

    Friday: Patchy fog before 8am.  Otherwise, sunny, with a high near 86. Calm wind becoming west around 5 mph in the afternoon.

    High: 86 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: A chance of showers between 10pm and 11pm.  Mostly clear, with a low around 67. Light and variable wind.  Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 85. North wind 5 to 9 mph.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 61. North wind 5 to 7 mph becoming calm  in the evening.

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 62. Light northeast wind.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 86. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
A chance of showers between 10pm and 11pm. Mostly clear, with a low around 67. Light and variable wind. Chance of precipitation is 30%.
Saturday
Sunny, with a high near 85. North wind 5 to 9 mph.
Saturday Night
Mostly clear, with a low around 61. North wind 5 to 7 mph becoming calm in the evening.
Sunday
Sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 61.
Monday
Mostly sunny, with a high near 80.
Monday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63.
Tuesday
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 84.
Tuesday Night
A 30 percent chance of showers. Partly cloudy, with a low around 66.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 86.
Wednesday Night
Partly cloudy, with a low around 65.
Thursday
Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles W Dow IL
 39.05°N 90.41°W (Elev. 600 ft)
10:26 pm CDT Aug 20, 2026
10pm CDT Aug 20, 2026-6pm CDT Aug 27, 2026
 
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Additional Resources

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