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

36°F

2°C

Humidity 30%
Wind Speed SW 10 G 22 mph
Barometer 30.14 in (1021.1 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 20 Jan 11:53 pm CST
Extended Forecast for

Crystal City MO

  • Overnight

    Overnight: Mostly cloudy, with a low around 29. Southwest wind around 7 mph, with gusts as high as 20 mph.

    Low: 29 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 45. West wind 7 to 9 mph, with gusts as high as 20 mph.

    High: 45 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 23. West wind 5 to 7 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.

    Low: 23 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 40. Light and variable wind.

    High: 40 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 12. Calm wind becoming north 5 to 7 mph after midnight.

    Low: 12 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 19.

    High: 19 °F

    Cold

  • Friday Night

    Friday Night: A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 2.

    Low: 2 °F

    Chance Snow

  • Saturday

    Saturday: A 50 percent chance of snow. Cloudy and cold, with a high near 14.

    High: 14 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 7.

    Low: 7 °F

    Chance Snow

Detailed Forecast

Overnight
Mostly cloudy, with a low around 29. Southwest wind around 7 mph, with gusts as high as 20 mph.
Wednesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 45. West wind 7 to 9 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 23. West wind 5 to 7 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Thursday
Mostly sunny, with a high near 40. Light and variable wind.
Thursday Night
Mostly cloudy, with a low around 12. Calm wind becoming north 5 to 7 mph after midnight.
Friday
Mostly cloudy and cold, with a high near 19.
Friday Night
A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 2.
Saturday
A 50 percent chance of snow. Cloudy and cold, with a high near 14.
Saturday Night
A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 7.
Sunday
Partly sunny, with a high near 24.
Sunday Night
Partly cloudy, with a low around 5.
Monday
Mostly sunny, with a high near 28.
Monday Night
Mostly clear, with a low around 10.
Tuesday
Mostly sunny, with a high near 39.
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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:
11:16 pm CST Jan 20, 2026
Forecast Valid:
12am CST Jan 21, 2026-6pm CST Jan 27, 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