National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

80°F

27°C

Humidity 87%
Wind Speed Calm
Barometer 30.01 in (1015.9 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 16 Aug 7:53 pm CDT
Extended Forecast for

Crystal City MO

Heat Advisory August 16, 08:44pm until August 18, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 16, 08:44pm until August 18, 08:00pm

    NOW until 8:00pm Mon

    Heat Advisory

  • Tonight

    Low: 73 °F

    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 107. Calm wind.

    High: 98 °F

    Sunny then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 73. Calm wind.

    Low: 73 °F

    Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 98. Heat index values as high as 109. Calm wind.

    High: 98 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. Calm wind.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 97.

    High: 97 °F

    Sunny then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 85.

    High: 85 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 73. Calm wind.
Sunday
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 107. Calm wind.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 73. Calm wind.
Monday
Sunny and hot, with a high near 98. Heat index values as high as 109. Calm wind.
Monday Night
Mostly clear, with a low around 75. Calm wind.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 97.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 85.
Wednesday Night
Partly cloudy, with a low around 67.
Thursday
Mostly sunny, with a high near 84.
Thursday Night
Mostly clear, with a low around 65.
Friday
Sunny, with a high near 89.
Friday Night
Mostly clear, with a low around 65.
Saturday
Sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Crystal City MO
 38.22°N 90.39°W (Elev. 446 ft)
Last Update:
5:56 pm CDT Aug 16, 2025
Forecast Valid:
8pm CDT Aug 16, 2025-6pm CDT Aug 23, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation