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

54°F

12°C

Humidity 87%
Wind Speed Calm
Barometer 30.08 in (1018.3 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 8 Oct 11:53 pm CDT
Extended Forecast for

4 Miles S Troy IL

  • Overnight

    Overnight: Patchy fog. Otherwise, clear, with a low around 51. Calm wind.

    Low: 51 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 9am. Otherwise, sunny, with a high near 89. South wind 5 to 11 mph.

    High: 89 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 59. Southeast wind 5 to 7 mph.

    Low: 59 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Increasing clouds, with a high near 83. Light southeast wind increasing to 5 to 10 mph in the morning.

    High: 83 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 59. East wind 7 to 10 mph.

    Low: 59 °F

    Chance Rain

  • Sunday

    Sunday: Partly sunny, with a high near 79.

    High: 79 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy fog. Otherwise, clear, with a low around 51. Calm wind.
Friday
Patchy fog before 9am. Otherwise, sunny, with a high near 89. South wind 5 to 11 mph.
Friday Night
Increasing clouds, with a low around 59. Southeast wind 5 to 7 mph.
Saturday
Increasing clouds, with a high near 83. Light southeast wind increasing to 5 to 10 mph in the morning.
Saturday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 59. East wind 7 to 10 mph.
Sunday
Partly sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 59.
Columbus Day
Sunny, with a high near 91.
Monday Night
Mostly clear, with a low around 66.
Tuesday
Sunny, with a high near 86.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 59.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 81.
Wednesday Night
A 30 percent chance of showers. Partly cloudy, with a low around 61.
Thursday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Troy IL
 38.68°N 89.89°W (Elev. 525 ft)
Last Update:
10:21 pm CDT Oct 8, 2026
Forecast Valid:
12am CDT Oct 9, 2026-6pm CDT Oct 15, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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