Heat Persists in the Southwest; Elevated to Critical Fire Weather in the Great Basin; Poor Air Quality in the West

Dangerous heat will persist across the Southwest U.S. through this week, easing by next week. The heat will focus further east in the Great Plains and Mississippi Valley beginning next week. Elevated to locally critical fire weather conditions will persist for the Great Basin today. Poor air quality lingers for the Northwest, Great Basin, Central Rockies into the Plains. Read More >

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fog/Mist

69°F

21°C

Humidity 90%
Wind Speed Calm
Barometer 30.04 in (1016.6 mb)
Dewpoint 66°F (19°C)
Visibility 9.00 mi
Last update 4 Aug 7:54 am CDT
Extended Forecast for

4 Miles SW Weldon Spring Heights MO

  • Today

    Today: Sunny, with a high near 89. Calm wind.

    High: 89 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 69. Light southeast wind.

    Low: 69 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 90. Light south wind.

    High: 90 °F

    Sunny

  • 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 71. Calm wind becoming southeast around 5 mph.  Chance of precipitation is 70%.

    Low: 71 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 1pm.  Partly sunny, with a high near 87. Light and variable wind.  Chance of precipitation is 70%.

    High: 87 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 70.

    Low: 70 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Friday

    Friday: Partly sunny, with a high near 87.

    High: 87 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 89. Calm wind.
Tonight
Mostly clear, with a low around 69. Light southeast wind.
Wednesday
Sunny, with a high near 90. Light south wind.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 71. Calm wind becoming southeast around 5 mph. Chance of precipitation is 70%.
Thursday
Showers likely and possibly a thunderstorm before 1pm. Partly sunny, with a high near 87. Light and variable wind. Chance of precipitation is 70%.
Thursday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70.
Friday
Partly sunny, with a high near 87.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 70.
Saturday
Mostly sunny, with a high near 89.
Saturday Night
Mostly clear, with a low around 72.
Sunday
Sunny, with a high near 92.
Sunday Night
Mostly clear, with a low around 74.
Monday
Sunny, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Weldon Spring Heights MO
 38.68°N 90.74°W (Elev. 597 ft)
5:21 am CDT Aug 4, 2026
8am CDT Aug 4, 2026-6pm CDT Aug 10, 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