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

68°F

20°C

Humidity 93%
Wind Speed Vrbl 3 mph
Barometer 29.92 in (1012.8 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 22 Sep 8:53 am CDT
Extended Forecast for

Trenton ILSimilar City Names

  • Today

    Today: Isolated showers and thunderstorms between noon and 3pm. Mostly cloudy, with a high near 77. South wind 5 to 7 mph. Chance of precipitation is 20%.

    High: 77 °F

    Cloudy then
    Isolated
    T-storms

  • Tonight

    Tonight: Mostly cloudy, with a low around 66. Light southeast wind.

    Low: 66 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81. Calm wind becoming south around 6 mph in the morning. Chance of precipitation is 50%.

    High: 81 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 70%.

    Low: 65 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 77. Southeast wind 6 to 9 mph becoming north in the afternoon. Chance of precipitation is 80%.

    High: 77 °F

    Showers

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 75. Chance of precipitation is 40%.

    High: 75 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers. Partly cloudy, with a low around 58.

    Low: 58 °F

    Slight Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers. Mostly sunny, with a high near 77.

    High: 77 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Isolated showers and thunderstorms between noon and 3pm. Mostly cloudy, with a high near 77. South wind 5 to 7 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 66. Light southeast wind.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81. Calm wind becoming south around 6 mph in the morning. Chance of precipitation is 50%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 70%.
Wednesday
Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 77. Southeast wind 6 to 9 mph becoming north in the afternoon. Chance of precipitation is 80%.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 61.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 75. Chance of precipitation is 40%.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 58.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 77.
Friday Night
Mostly clear, with a low around 57.
Saturday
Sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Sunny, with a high near 82.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Trenton ILSimilar City Names
 38.6°N 89.69°W (Elev. 502 ft)
Last Update:
9:26 am CDT Sep 22, 2025
Forecast Valid:
9am CDT Sep 22, 2025-6pm CDT Sep 28, 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