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

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Mostly Cloudy

75°F

24°C

Humidity 94%
Wind Speed S 5 mph
Barometer 29.72 in (1006.0 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 31 Jul 10:53 pm CDT
Extended Forecast for

Crystal City MO

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms between midnight and 1am. Mostly cloudy, with a low around 68. Southwest wind 5 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 68 °F

    Showers
    Likely

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 77. West wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    High: 77 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Cloudy, with a low around 65. Northwest wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    Low: 65 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers between 7am and 9am. Cloudy, then gradually becoming mostly sunny, with a high near 80. North wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 80 °F

    Chance
    Showers then
    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 63. North wind around 6 mph becoming calm in the evening.

    Low: 63 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 63.

    Low: 63 °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 65.

    Low: 65 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms between midnight and 1am. Mostly cloudy, with a low around 68. Southwest wind 5 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Saturday
A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 77. West wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms. Cloudy, with a low around 65. Northwest wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Sunday
A chance of showers between 7am and 9am. Cloudy, then gradually becoming mostly sunny, with a high near 80. North wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 63. North wind around 6 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 83.
Monday Night
Mostly clear, with a low around 63.
Tuesday
Sunny, with a high near 86.
Tuesday Night
Mostly clear, with a low around 65.
Wednesday
Sunny, with a high near 90.
Wednesday Night
Mostly clear, with a low around 68.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Friday
Mostly sunny, with a high near 94.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Crystal City MO
 38.22°N 90.39°W (Elev. 446 ft)
Last Update:
10:51 pm CDT Jul 31, 2026
Forecast Valid:
11pm CDT Jul 31, 2026-6pm CDT Aug 7, 2026
 
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