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

77°F

25°C

Humidity 50%
Wind Speed S 5 mph
Barometer 29.80 in (1008.9 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 17 Oct 6:53 pm CDT
Extended Forecast for

Trenton IL

  • Tonight

    Tonight: Mostly clear, with a low around 62. South wind 7 to 9 mph.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11am. High near 75. Southwest wind 8 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.

    High: 75 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 50. Breezy, with a southwest wind 9 to 14 mph becoming northwest 15 to 20 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 100%.

    Low: 50 °F

    Showers and
    Breezy

  • Sunday

    Sunday: Cloudy through mid morning, then gradual clearing, with a high near 64. Northwest wind around 18 mph, with gusts as high as 28 mph.

    High: 64 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 43. West wind 5 to 7 mph becoming calm.

    Low: 43 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 62. South wind 7 to 9 mph.
Saturday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11am. High near 75. Southwest wind 8 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm. Low around 50. Breezy, with a southwest wind 9 to 14 mph becoming northwest 15 to 20 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 100%.
Sunday
Cloudy through mid morning, then gradual clearing, with a high near 64. Northwest wind around 18 mph, with gusts as high as 28 mph.
Sunday Night
Clear, with a low around 43. West wind 5 to 7 mph becoming calm.
Monday
Sunny, with a high near 72.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Sunny, with a high near 63.
Tuesday Night
Mostly clear, with a low around 39.
Wednesday
Sunny, with a high near 65.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 45.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 68.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 44.
Friday
Mostly sunny, with a high near 66.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Trenton IL
 38.6°N 89.69°W (Elev. 502 ft)
Last Update:
7:21 pm CDT Oct 17, 2025
Forecast Valid:
7pm CDT Oct 17, 2025-6pm CDT Oct 24, 2025
 
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