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.

Fair

21°F

-6°C

Humidity 54%
Wind Speed NW 10 mph
Barometer 30.16 in (1021.8 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 17 Mar 1:53 am CDT
Extended Forecast for

Crystal City MO

  • Overnight

    Overnight: Mostly clear, with a low around 15. Northwest wind 5 to 7 mph.

    Low: 15 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 38. Northwest wind around 6 mph becoming light and variable in the afternoon.

    High: 38 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A chance of snow before 3am, then a chance of rain. Cloudy, with a low around 31. Calm wind becoming south 5 to 7 mph in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    Low: 31 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 66. South wind around 7 mph becoming west in the afternoon.

    High: 66 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 15. Northwest wind 5 to 7 mph.
Tuesday
Increasing clouds, with a high near 38. Northwest wind around 6 mph becoming light and variable in the afternoon.
Tuesday Night
A chance of snow before 3am, then a chance of rain. Cloudy, with a low around 31. Calm wind becoming south 5 to 7 mph in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Wednesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 66. South wind around 7 mph becoming west in the afternoon.
Wednesday Night
Partly cloudy, with a low around 43. Calm wind.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
Mostly clear, with a low around 46.
Friday
Sunny, with a high near 78.
Friday Night
Mostly clear, with a low around 49.
Saturday
Sunny, with a high near 81.
Saturday Night
Clear, with a low around 53.
Sunday
Sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 59.
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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:
1:41 am CDT Mar 17, 2026
Forecast Valid:
2am CDT Mar 17, 2026-6pm CDT Mar 23, 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