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

73°F

23°C

Humidity 64%
Wind Speed S 7 mph
Barometer 29.94 in (1013.2 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 11 Oct 10:54 pm CDT
Extended Forecast for

Defiance MO

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 59. Light south wind.

    Low: 59 °F

    Patchy Fog

  • Columbus Day

    Columbus Day: Areas of fog before 8am. Otherwise, sunny, with a high near 93. Southwest wind 5 to 10 mph.

    High: 93 °F

    Areas Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 70. Southwest wind around 6 mph.

    Low: 70 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 95. Heat index values as high as 100. Southwest wind 5 to 7 mph.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 70. Light south wind. Chance of precipitation is 60%.

    Low: 70 °F

    Partly Cloudy
    then Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 81. Chance of precipitation is 90%.

    High: 81 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 63. Chance of precipitation is 70%.

    Low: 63 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 80%.

    High: 77 °F

    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 53.

    Low: 53 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 59. Light south wind.
Columbus Day
Areas of fog before 8am. Otherwise, sunny, with a high near 93. Southwest wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 70. Southwest wind around 6 mph.
Tuesday
Sunny, with a high near 95. Heat index values as high as 100. Southwest wind 5 to 7 mph.
Tuesday Night
Showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 70. Light south wind. Chance of precipitation is 60%.
Wednesday
Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 81. Chance of precipitation is 90%.
Wednesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 63. Chance of precipitation is 70%.
Thursday
Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 80%.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 53.
Friday
Partly sunny, with a high near 66.
Friday Night
Partly cloudy, with a low around 39.
Saturday
Sunny, with a high near 61.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Defiance MO
 38.63°N 90.77°W (Elev. 479 ft)
Last Update:
10:16 pm CDT Oct 11, 2026
Forecast Valid:
11pm CDT Oct 11, 2026-6pm CDT Oct 18, 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