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

63°F

17°C

Humidity 24%
Wind Speed NW 13 mph
Barometer 29.94 in (1013.8 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 13 Mar 4:53 pm CDT
Extended Forecast for

Crystal City MO

  • Tonight

    Tonight: Mostly clear, with a low around 35. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 35 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 67. Light and variable wind becoming southeast 5 to 9 mph in the morning.

    High: 67 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 53. South wind 6 to 10 mph, with gusts as high as 24 mph.

    Low: 53 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Rain, mainly between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. High near 69. South wind 14 to 16 mph, with gusts as high as 34 mph. Chance of precipitation is 80%.

    High: 69 °F

    Chance Rain
    then Showers

  • Sunday Night

    Sunday Night: Rain before 10pm, then snow, possibly mixed with rain between 10pm and 1am, then a chance of snow after 1am. Some thunder is also possible. Low around 21. West wind 14 to 17 mph, with gusts as high as 39 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 21 °F

    Rain/Snow

  • Monday

    Monday: A 20 percent chance of snow before 1pm. Partly sunny, with a high near 30.

    High: 30 °F

    Slight Chance
    Snow

  • Monday Night

    Monday Night: Mostly clear, with a low around 11.

    Low: 11 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 40.

    High: 40 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of snow before 1am, then a slight chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 20%.

    Low: 28 °F

    Slight Chance
    Snow then
    Slight Chance
    Rain/Snow

Detailed Forecast

Tonight
Mostly clear, with a low around 35. Northwest wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 67. Light and variable wind becoming southeast 5 to 9 mph in the morning.
Saturday Night
Increasing clouds, with a low around 53. South wind 6 to 10 mph, with gusts as high as 24 mph.
Sunday
Rain, mainly between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. High near 69. South wind 14 to 16 mph, with gusts as high as 34 mph. Chance of precipitation is 80%.
Sunday Night
Rain before 10pm, then snow, possibly mixed with rain between 10pm and 1am, then a chance of snow after 1am. Some thunder is also possible. Low around 21. West wind 14 to 17 mph, with gusts as high as 39 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Monday
A 20 percent chance of snow before 1pm. Partly sunny, with a high near 30.
Monday Night
Mostly clear, with a low around 11.
Tuesday
Sunny, with a high near 40.
Tuesday Night
A slight chance of snow before 1am, then a slight chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 66.
Wednesday Night
Mostly clear, with a low around 41.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
Mostly clear, with a low around 45.
Friday
Sunny, with a high near 72.
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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:
4:41 pm CDT Mar 13, 2026
Forecast Valid:
5pm CDT Mar 13, 2026-6pm CDT Mar 20, 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