Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

Current conditions at

Washington Regional Airport (KFYG)

Lat: 38.59°NLon: 90.99°WElev: 489ft.

Fair

79°F

26°C

Humidity 100%
Wind Speed Calm
Barometer 29.93 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 4 Sep 10:35 pm CDT
Extended Forecast for

Hermann MO

Extreme Heat Warning September 4, 11:03pm until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 4, 11:03pm until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Tonight

    Low: 72 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. Heat index values as high as 106. Calm wind.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 70. Calm wind.

    Low: 70 °F

    Mostly Clear

  • Sunday

    Sunday: Isolated showers and thunderstorms before 1pm.  Sunny, with a high near 93. Heat index values as high as 100. Light east wind.  Chance of precipitation is 20%.

    High: 93 °F

    Isolated
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 65. Light east wind.

    Low: 65 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

Detailed Forecast

Tonight
Mostly clear, with a low around 72. Calm wind.
Saturday
Sunny and hot, with a high near 99. Heat index values as high as 106. Calm wind.
Saturday Night
Mostly clear, with a low around 70. Calm wind.
Sunday
Isolated showers and thunderstorms before 1pm. Sunny, with a high near 93. Heat index values as high as 100. Light east wind. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 65. Light east wind.
Labor Day
Sunny, with a high near 89.
Monday Night
Mostly clear, with a low around 65.
Tuesday
Sunny and hot, with a high near 97.
Tuesday Night
Mostly clear, with a low around 72.
Wednesday
Sunny and hot, with a high near 98.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 70.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Friday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
Hermann MO
 38.69°N 91.42°W (Elev. 692 ft)
6:36 pm CDT Sep 4, 2026
11pm CDT Sep 4, 2026-6pm CDT Sep 11, 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