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

75°F

24°C

Humidity 84%
Wind Speed Calm
Barometer 30.00 in (1015.6 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 14 Oct 1:53 pm CDT
Extended Forecast for

Trenton IL

  • This Afternoon

    This Afternoon: A 30 percent chance of showers, mainly before 4pm. Cloudy, with a high near 77. North wind 3 to 5 mph.

    High: 77 °F

    Chance
    Showers

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 4am. Cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Cloudy then
    Chance
    Showers

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 1pm. High near 84. Light and variable wind becoming south 6 to 11 mph in the morning. Chance of precipitation is 80%.

    High: 84 °F

    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. West wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 50%.

    Low: 51 °F

    Chance
    Showers

  • Friday

    Friday: Mostly cloudy, with a high near 57. Breezy, with a northwest wind 20 to 25 mph, with gusts as high as 32 mph.

    High: 57 °F

    Mostly Cloudy
    and Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 37.

    Low: 37 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers, mainly before 4pm. Cloudy, with a high near 77. North wind 3 to 5 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 4am. Cloudy, with a low around 67. Calm wind.
Thursday
Showers and thunderstorms, mainly before 1pm. High near 84. Light and variable wind becoming south 6 to 11 mph in the morning. Chance of precipitation is 80%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. West wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 50%.
Friday
Mostly cloudy, with a high near 57. Breezy, with a northwest wind 20 to 25 mph, with gusts as high as 32 mph.
Friday Night
Partly cloudy, with a low around 40.
Saturday
Sunny, with a high near 62.
Saturday Night
Clear, with a low around 37.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 40.
Monday
Mostly sunny, with a high near 74.
Monday Night
Partly cloudy, with a low around 44.
Tuesday
Mostly sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Trenton IL
 38.6°N 89.69°W (Elev. 502 ft)
Last Update:
2:06 pm CDT Oct 14, 2026
Forecast Valid:
2pm CDT Oct 14, 2026-6pm CDT Oct 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