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.

Overcast

66°F

19°C

Humidity 81%
Wind Speed Calm
Barometer 29.98 in (1015.0 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 25 Dec 12:53 pm CST
Extended Forecast for

Cahokia / St. Louis, St. Louis Downtown Airport IL

  • Christmas Day

    Christmas Day: Partly sunny, with a high near 69. Calm wind becoming east around 6 mph.

    High: 69 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 57. Southeast wind around 8 mph becoming southwest after midnight.

    Low: 57 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 69. Southwest wind 6 to 10 mph becoming northwest in the afternoon.

    High: 69 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 43. Light and variable wind.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 67. Light east wind becoming southeast 5 to 10 mph in the morning.

    High: 67 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of rain after midnight. Cloudy, with a low around 58.

    Low: 58 °F

    Cloudy then
    Chance Rain

  • Sunday

    Sunday: Rain likely, then showers and possibly a thunderstorm after 9am. High near 67. Chance of precipitation is 80%.

    High: 67 °F

    Showers

  • Sunday Night

    Sunday Night: Rain likely, possibly mixed with snow before midnight. Mostly cloudy, with a low around 21. Blustery. Chance of precipitation is 60%.

    Low: 21 °F

    Rain/Snow
    Likely then
    Mostly Cloudy
    and Blustery

  • Monday

    Monday: Mostly sunny, with a high near 29. Blustery.

    High: 29 °F

    Mostly Sunny
    and Blustery
    then Sunny

Detailed Forecast

Christmas Day
Partly sunny, with a high near 69. Calm wind becoming east around 6 mph.
Tonight
Mostly cloudy, with a low around 57. Southeast wind around 8 mph becoming southwest after midnight.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 69. Southwest wind 6 to 10 mph becoming northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 43. Light and variable wind.
Saturday
Partly sunny, with a high near 67. Light east wind becoming southeast 5 to 10 mph in the morning.
Saturday Night
A 30 percent chance of rain after midnight. Cloudy, with a low around 58.
Sunday
Rain likely, then showers and possibly a thunderstorm after 9am. High near 67. Chance of precipitation is 80%.
Sunday Night
Rain likely, possibly mixed with snow before midnight. Mostly cloudy, with a low around 21. Blustery. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 29. Blustery.
Monday Night
Mostly clear, with a low around 17.
Tuesday
Sunny, with a high near 36.
Tuesday Night
Partly cloudy, with a low around 24.
Wednesday
Mostly sunny, with a high near 42.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cahokia / St. Louis, St. Louis Downtown Airport IL
 38.57°N 90.15°W (Elev. 407 ft)
Last Update:
12:26 pm CST Dec 25, 2025
Forecast Valid:
12pm CST Dec 25, 2025-6pm CST Dec 31, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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