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

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

79°F

26°C

Humidity 79%
Wind Speed Calm
Barometer 30.07 in (1017.4 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 8 Jul 8:54 am CDT
Extended Forecast for

Defiance MO

  • Today

    Today: Sunny, with a high near 90. Light and variable wind.

    High: 90 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 71. Light south wind.

    Low: 71 °F

    Mostly Clear

  • Thursday

    Thursday: Scattered showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 92. Heat index values as high as 102. Southwest wind 3 to 8 mph. Chance of precipitation is 50%.

    High: 92 °F

    Mostly Sunny
    then
    Scattered
    T-storms

  • Thursday Night

    Thursday Night: Showers and thunderstorms, mainly after 10pm. Low around 73. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%.

    Low: 73 °F

    T-storms

  • Friday

    Friday: Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 90. Light west wind. Chance of precipitation is 70%.

    High: 90 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms likely. Mostly cloudy, with a low around 71. Chance of precipitation is 70%.

    Low: 71 °F

    T-storms
    Likely

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.

    High: 88 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.

    High: 88 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 90. Light and variable wind.
Tonight
Mostly clear, with a low around 71. Light south wind.
Thursday
Scattered showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 92. Heat index values as high as 102. Southwest wind 3 to 8 mph. Chance of precipitation is 50%.
Thursday Night
Showers and thunderstorms, mainly after 10pm. Low around 73. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%.
Friday
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 90. Light west wind. Chance of precipitation is 70%.
Friday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 71. Chance of precipitation is 70%.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Sunday Night
Mostly clear, with a low around 70.
Monday
Sunny, with a high near 90.
Monday Night
Clear, with a low around 71.
Tuesday
Sunny, with a high near 92.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Defiance MO
 38.63°N 90.77°W (Elev. 479 ft)
Last Update:
8:16 am CDT Jul 8, 2026
Forecast Valid:
9am CDT Jul 8, 2026-6pm CDT Jul 14, 2026
 
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