Severe Weather and Heavy Rain from the Ohio Valley to the Mid-Atlantic; Heat Persists in the South-Central U.S.

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected across portions of the Ohio Valley into southern Mid-Atlantic and Carolinas. Rounds of strong thunderstorms are expected to develop across the northern and central Plains. Sweltering heat remains most persistent across the South-Central Plains and Lower/Middle Mississippi Valley through next week. Read More >

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair with Haze

80°F

27°C

Humidity 71%
Wind Speed E 8 mph
Barometer 30.00 in (1015.1 mb)
Dewpoint 70°F (21°C)
Visibility 6.00 mi
Heat Index83°F (28°C)
Last update 6 Sep 9:54 am CDT
Extended Forecast for

2 Miles ESE Defiance MO

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 90. Northeast wind around 7 mph.

    High: 90 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Partly cloudy, with a low around 64. Northeast wind around 5 mph becoming calm  after midnight.

    Low: 64 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Sunny, with a high near 89. Calm wind becoming east around 5 mph in the afternoon.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 62. Calm wind.

    Low: 62 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 95. Calm wind becoming south around 5 mph in the afternoon.

    High: 95 °F

    Sunny

  • Tuesday Night

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

    Low: 73 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am.  Mostly cloudy, with a low around 70. Chance of precipitation is 70%.

    Low: 70 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 84. Chance of precipitation is 60%.

    High: 84 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 90. Northeast wind around 7 mph.
Tonight
Partly cloudy, with a low around 64. Northeast wind around 5 mph becoming calm after midnight.
Labor Day
Sunny, with a high near 89. Calm wind becoming east around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 62. Calm wind.
Tuesday
Sunny, with a high near 95. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 73.
Wednesday
Mostly sunny and hot, with a high near 98.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 70. Chance of precipitation is 70%.
Thursday
Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Thursday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 64.
Friday
A 20 percent chance of showers. Sunny, with a high near 87.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 64.
Saturday
A 20 percent chance of showers. Sunny, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Defiance MO
 38.63°N 90.74°W (Elev. 440 ft)
9:21 am CDT Sep 6, 2026
10am CDT Sep 6, 2026-6pm CDT Sep 12, 2026
 
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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