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

59°F

15°C

Humidity 27%
Wind Speed SW 5 mph
Barometer 30.16 in (1021.6 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 12 Jan 3:53 pm CST
Extended Forecast for

5 Miles S Troy IL

  • Tonight

    Tonight: Mostly cloudy during the early evening, then becoming clear, with a low around 36. South wind 6 to 8 mph.

    Low: 36 °F

    Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 61. West wind 8 to 15 mph, with gusts as high as 25 mph.

    High: 61 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain, mainly between 7pm and 11pm. Mostly cloudy, with a low around 36. West wind 8 to 13 mph, with gusts as high as 22 mph.

    Low: 36 °F

    Chance Rain

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature rising to near 41 by 10am, then falling to around 33 during the remainder of the day. Breezy, with a northwest wind 14 to 23 mph, with gusts as high as 33 mph.

    High: 41 °F⇓

    Mostly Cloudy
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 17. North wind 9 to 18 mph, with gusts as high as 26 mph.

    Low: 17 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of rain and snow after noon. Mostly cloudy, with a high near 43. Chance of precipitation is 20%.

    High: 43 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 19.

    Low: 19 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy during the early evening, then becoming clear, with a low around 36. South wind 6 to 8 mph.
Tuesday
Increasing clouds, with a high near 61. West wind 8 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
A 30 percent chance of rain, mainly between 7pm and 11pm. Mostly cloudy, with a low around 36. West wind 8 to 13 mph, with gusts as high as 22 mph.
Wednesday
Mostly cloudy, with a temperature rising to near 41 by 10am, then falling to around 33 during the remainder of the day. Breezy, with a northwest wind 14 to 23 mph, with gusts as high as 33 mph.
Wednesday Night
Partly cloudy, with a low around 17. North wind 9 to 18 mph, with gusts as high as 26 mph.
Thursday
Mostly sunny, with a high near 31.
Thursday Night
Mostly cloudy, with a low around 24.
Friday
A slight chance of rain and snow after noon. Mostly cloudy, with a high near 43. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, with a low around 19.
Saturday
Partly sunny, with a high near 29.
Saturday Night
Partly cloudy, with a low around 10.
Sunday
Mostly sunny, with a high near 26.
Sunday Night
Partly cloudy, with a low around 13.
M.L.King Day
Mostly sunny, with a high near 34.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles S Troy IL
 38.65°N 89.89°W (Elev. 499 ft)
Last Update:
4:46 pm CST Jan 12, 2026
Forecast Valid:
5pm CST Jan 12, 2026-6pm CST Jan 19, 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