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

81°F

27°C

Humidity 94%
Wind Speed SW 12 G 16 mph
Barometer 30.14 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 22 Jun 8:55 am CDT
Extended Forecast for

4 Miles SW Marthasville MO

Heat Advisory June 22, 09:04am until June 24, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 22, 09:04am until June 24, 09:00pm

    NOW until 9:00pm Tue

    Heat Advisory

  • Today

    High: 94 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 75. South wind 5 to 7 mph.

    Low: 75 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 94. Heat index values as high as 104. Southwest wind 5 to 8 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 74. Light south wind.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 94. Light southwest wind. Chance of precipitation is 20%.

    High: 94 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73.

    Low: 73 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

Today
Sunny, with a high near 94. Heat index values as high as 102. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.
Tonight
Clear, with a low around 75. South wind 5 to 7 mph.
Monday
Sunny, with a high near 94. Heat index values as high as 104. Southwest wind 5 to 8 mph.
Monday Night
Mostly clear, with a low around 74. Light south wind.
Tuesday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 94. Light southwest wind. Chance of precipitation is 20%.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73.
Wednesday
Mostly sunny, with a high near 93.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
Sunny, with a high near 94.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Marthasville MO
 38.58°N 91.11°W (Elev. 577 ft)
Last Update:
5:52 am CDT Jun 22, 2025
Forecast Valid:
9am CDT Jun 22, 2025-6pm CDT Jun 28, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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