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

Hazardous Weather Conditions

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

77°F

25°C

Humidity 71%
Wind Speed E 7 mph
Barometer 29.99 in (1015.0 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 15 Jun 6:54 pm CDT
Extended Forecast for

Marthasville MO

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 10pm. Mostly cloudy, with a low around 67. Light east wind.

    Low: 67 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers between 11am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 85. Calm wind becoming east around 5 mph. Chance of precipitation is 20%.

    High: 85 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 66. Light and variable wind.

    Low: 66 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.

    High: 91 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 70. South wind 3 to 5 mph.

    Low: 70 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 87. Chance of precipitation is 60%.

    High: 87 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66.

    Low: 66 °F

    Chance
    T-storms

  • Juneteenth

    Juneteenth: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Thursday Night

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

    Low: 65 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before 10pm. Mostly cloudy, with a low around 67. Light east wind.
Monday
A slight chance of showers between 11am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 85. Calm wind becoming east around 5 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 66. Light and variable wind.
Tuesday
Mostly sunny, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 70. South wind 3 to 5 mph.
Wednesday
Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 87. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66.
Juneteenth
Sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 65.
Friday
Sunny, with a high near 89.
Friday Night
Mostly clear, with a low around 73.
Saturday
Sunny, with a high near 94.
Saturday Night
Mostly clear, with a low around 73.
Sunday
Sunny, with a high near 94.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marthasville MO
 38.64°N 91.05°W (Elev. 561 ft)
Last Update:
5:51 pm CDT Jun 15, 2025
Forecast Valid:
7pm CDT Jun 15, 2025-6pm CDT Jun 22, 2025
 
Forecast Discussion
 
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Additional Resources

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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