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.

A Few Clouds

80°F

27°C

Humidity 54%
Wind Speed N 6 mph
Barometer 30.00 in (1015.2 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 20 Jun 10:54 am CDT
Extended Forecast for

Defiance MO

Flood Watch June 21, 07:00am until June 22, 01:00am
Click here for hazard details and duration
Flood Watch

  • Today

    Today: Mostly sunny, with a high near 84. Calm wind.

    High: 84 °F

    Mostly Sunny

  • Tonight

    Tonight: Isolated showers and thunderstorms after 4am. Mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 20%.

    Low: 67 °F

    Partly Cloudy
    then Isolated
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms, mainly after 2pm. High near 83. Southeast wind 5 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 90%.

    High: 83 °F

    T-storms

  • Sunday Night

    Sunday Night: Showers and thunderstorms, mainly before 1am. Low around 63. Southwest wind 5 to 8 mph becoming northwest after midnight. Chance of precipitation is 80%.

    Low: 63 °F

    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 77. North wind 5 to 7 mph.

    High: 77 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 84. Calm wind.
Tonight
Isolated showers and thunderstorms after 4am. Mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 20%.
Sunday
Showers and thunderstorms, mainly after 2pm. High near 83. Southeast wind 5 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 90%.
Sunday Night
Showers and thunderstorms, mainly before 1am. Low around 63. Southwest wind 5 to 8 mph becoming northwest after midnight. Chance of precipitation is 80%.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 77. North wind 5 to 7 mph.
Monday Night
Partly cloudy, with a low around 59.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Mostly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 61.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 61.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Defiance MO
 38.63°N 90.8°W (Elev. 522 ft)
Last Update:
9:41 am CDT Jun 20, 2026
Forecast Valid:
11am CDT Jun 20, 2026-6pm CDT Jun 26, 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