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.

Partly Cloudy

55°F

13°C

Humidity 40%
Wind Speed Vrbl 6 mph
Barometer 30.08 in (1018.7 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill54°F (12°C)
Last update 1 Nov 2:53 pm CDT
Extended Forecast for

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

Freeze Warning November 2, 01:00am until November 2, 07:00am
Click here for hazard details and duration
Freeze Warning

  • This Afternoon

    This Afternoon: A 20 percent chance of rain. Mostly cloudy, with a high near 53. Northwest wind around 9 mph.

    High: 53 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: A 20 percent chance of rain before 8pm. Widespread frost, mainly after 4am. Otherwise, partly cloudy, with a low around 32. Northwest wind around 6 mph becoming calm in the evening.

    Low: 32 °F

    Slight Chance
    Rain then
    Frost

  • Sunday

    Sunday: Widespread frost before 9am. Otherwise, sunny, with a high near 55. Light and variable wind.

    High: 55 °F

    Frost then
    Sunny

  • Sunday Night

    Sunday Night: Areas of frost after 3am. Otherwise, clear, with a low around 35. Calm wind becoming south around 5 mph after midnight.

    Low: 35 °F

    Clear then
    Areas Frost

  • Monday

    Monday: Areas of frost before 8am. Otherwise, sunny, with a high near 64. South wind 5 to 9 mph becoming west in the afternoon.

    High: 64 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of rain. Mostly cloudy, with a high near 53. Northwest wind around 9 mph.
Tonight
A 20 percent chance of rain before 8pm. Widespread frost, mainly after 4am. Otherwise, partly cloudy, with a low around 32. Northwest wind around 6 mph becoming calm in the evening.
Sunday
Widespread frost before 9am. Otherwise, sunny, with a high near 55. Light and variable wind.
Sunday Night
Areas of frost after 3am. Otherwise, clear, with a low around 35. Calm wind becoming south around 5 mph after midnight.
Monday
Areas of frost before 8am. Otherwise, sunny, with a high near 64. South wind 5 to 9 mph becoming west in the afternoon.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Mostly sunny, with a high near 69.
Tuesday Night
Mostly clear, with a low around 47.
Wednesday
Sunny, with a high near 71.
Wednesday Night
Clear, with a low around 41.
Thursday
Sunny, with a high near 66.
Thursday Night
A 20 percent chance of rain. Partly cloudy, with a low around 48.
Friday
A 30 percent chance of rain. Partly sunny, with a high near 66.
Friday Night
A 20 percent chance of rain. Partly cloudy, with a low around 44.
Saturday
Mostly sunny, with a high near 66.
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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:
1:56 pm CDT Nov 1, 2025
Forecast Valid:
3pm CDT Nov 1, 2025-6pm CST Nov 8, 2025
 
Forecast Discussion
 
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