Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Light Rain

69°F

21°C

Humidity 93%
Wind Speed NW 9 mph
Barometer 29.76 in (1007.4 mb)
Dewpoint 67°F (19°C)
Visibility 7.00 mi
Last update 1 Aug 9:54 pm CDT
Extended Forecast for

Ellisville MO

  • Tonight

    Tonight: A chance of drizzle before 4am, then a slight chance of drizzle after 5am.  Mostly cloudy, with a low around 66. North wind 11 to 13 mph, with gusts as high as 22 mph.

    Low: 66 °F

    Chance
    Drizzle

  • Sunday

    Sunday: Partly sunny, with a high near 80. North wind around 11 mph, with gusts as high as 23 mph.

    High: 80 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 65. North wind 5 to 8 mph becoming calm  in the evening.

    Low: 65 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 84. North wind 3 to 5 mph.

    High: 84 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly clear, with a low around 66. Light and variable wind.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy
    then Chance
    T-storms

Detailed Forecast

Tonight
A chance of drizzle before 4am, then a slight chance of drizzle after 5am. Mostly cloudy, with a low around 66. North wind 11 to 13 mph, with gusts as high as 22 mph.
Sunday
Partly sunny, with a high near 80. North wind around 11 mph, with gusts as high as 23 mph.
Sunday Night
Partly cloudy, with a low around 65. North wind 5 to 8 mph becoming calm in the evening.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 84. North wind 3 to 5 mph.
Monday Night
Mostly clear, with a low around 66. Light and variable wind.
Tuesday
Sunny, with a high near 86.
Tuesday Night
Mostly clear, with a low around 67.
Wednesday
Sunny, with a high near 88.
Wednesday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70.
Thursday
A 50 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 87.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Friday Night
Partly cloudy, with a low around 73.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
Ellisville MO
 38.58°N 90.57°W (Elev. 696 ft)
9:01 pm CDT Aug 1, 2026
10pm CDT Aug 1, 2026-6pm CDT Aug 8, 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