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.

Overcast

75°F

24°C

Humidity 71%
Wind Speed SW 8 G 18 mph
Barometer 29.92 in (1013.0 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 15 Oct 9:53 pm CDT
Extended Forecast for

Valmeyer IL

  • Tonight

    Tonight: Scattered showers, mainly before 2am. Clear early, then becoming cloudy, with a low around 50. Northwest wind 11 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.

    Low: 50 °F

    Scattered
    Showers

  • Friday

    Friday: Increasing clouds, with a high near 56. Northwest wind 15 to 17 mph, with gusts as high as 32 mph.

    High: 56 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 39. Northwest wind 8 to 15 mph, with gusts as high as 29 mph.

    Low: 39 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 60. North wind around 6 mph becoming calm in the afternoon.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 35. Calm wind.

    Low: 35 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Sunday Night

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

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Tonight
Scattered showers, mainly before 2am. Clear early, then becoming cloudy, with a low around 50. Northwest wind 11 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
Friday
Increasing clouds, with a high near 56. Northwest wind 15 to 17 mph, with gusts as high as 32 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 39. Northwest wind 8 to 15 mph, with gusts as high as 29 mph.
Saturday
Sunny, with a high near 60. North wind around 6 mph becoming calm in the afternoon.
Saturday Night
Clear, with a low around 35. Calm wind.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 39.
Monday
Mostly sunny, with a high near 71.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Valmeyer IL
 38.31°N 90.3°W (Elev. 397 ft)
Last Update:
8:56 pm CDT Oct 15, 2026
Forecast Valid:
10pm CDT Oct 15, 2026-6pm CDT Oct 22, 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