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

Hazardous Weather Conditions

Current conditions at

SULLIVAN (KUUV)

Lat: 38.23°NLon: 91.16°WElev: 933ft.

Fair

N/A

Humidity NA
Wind Speed W 8 mph
Barometer 30.00 in
Dewpoint N/A
Visibility 10.00 mi
Last update 26 Jul 10:15 am CDT
Extended Forecast for

8 Miles W Potosi MO

Extreme Heat Warning until July 27, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning until July 27, 09:00pm

    NOW until 9:00pm Mon

    Extreme Heat Warning

  • Today

    High: 99 °F

    Isolated
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 76. Calm wind.

    Low: 76 °F

    Partly Cloudy

  • Monday

    Monday: Sunny and hot, with a high near 99. Heat index values as high as 108. Southwest wind 3 to 6 mph.

    High: 99 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 77. Light southwest wind.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 95. Northwest wind 3 to 5 mph.

    High: 95 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Today
Isolated showers and thunderstorms after 4pm. Mostly sunny and hot, with a high near 99. Heat index values as high as 111. Calm wind. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 76. Calm wind.
Monday
Sunny and hot, with a high near 99. Heat index values as high as 108. Southwest wind 3 to 6 mph.
Monday Night
Mostly clear, with a low around 77. Light southwest wind.
Tuesday
Mostly sunny, with a high near 95. Northwest wind 3 to 5 mph.
Tuesday Night
Partly cloudy, with a low around 72.
Wednesday
Sunny, with a high near 90.
Wednesday Night
Mostly clear, with a low around 66.
Thursday
Sunny, with a high near 90.
Thursday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 68.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
8 Miles W Potosi MO
 37.9°N 90.91°W (Elev. 997 ft)
Last Update:
8:46 am CDT Jul 26, 2026
Forecast Valid:
11am CDT Jul 26, 2026-6pm CDT Aug 1, 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