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

78°F

26°C

Humidity 87%
Wind Speed Calm
Barometer 29.94 in (1012.6 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 6 Sep 12:54 am CDT
Extended Forecast for

3 Miles ESE Weldon Spring MO

  • Overnight

    Overnight: Partly cloudy, with a low around 72. Light northeast wind.

    Low: 72 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 91. Northeast wind 5 to 8 mph.

    High: 91 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 65. East wind 3 to 7 mph.

    Low: 65 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Sunny, with a high near 89. East wind 3 to 6 mph.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64. East wind around 5 mph becoming calm  in the evening.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Wednesday

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

    High: 98 °F

    Hot

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 71.

    Low: 71 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 72. Light northeast wind.
Sunday
Mostly sunny, with a high near 91. Northeast wind 5 to 8 mph.
Sunday Night
Partly cloudy, with a low around 65. East wind 3 to 7 mph.
Labor Day
Sunny, with a high near 89. East wind 3 to 6 mph.
Monday Night
Mostly clear, with a low around 64. East wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Mostly clear, with a low around 74.
Wednesday
Mostly sunny and hot, with a high near 98.
Wednesday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 71.
Thursday
A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 86.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 87.
Friday Night
A 30 percent chance of showers. Partly cloudy, with a low around 64.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 91.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Weldon Spring MO
 38.7°N 90.6°W (Elev. 446 ft)
12:16 am CDT Sep 6, 2026
1am 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