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.

A Few Clouds

33°F

1°C

Humidity 52%
Wind Speed NW 13 mph
Barometer 30.40 in (1029.9 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 27 Nov 10:53 pm CST
Extended Forecast for

4 Miles NNE Valmeyer IL

  • Tonight

    Tonight: Clear, with a low around 22. Northwest wind around 5 mph becoming calm after midnight.

    Low: 22 °F

    Clear

  • Friday

    Friday: Increasing clouds, with a high near 39. Light and variable wind.

    High: 39 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Snow, mainly after 3am. Low around 30. Light southeast wind increasing to 5 to 9 mph in the evening. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 30 °F

    Cloudy then
    Snow

  • Saturday

    Saturday: Snow before 9am, then rain and snow between 9am and 3pm, then rain after 3pm. High near 39. Southeast wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

    High: 39 °F

    Rain/Snow

  • Saturday Night

    Saturday Night: Rain, mainly before midnight. Low around 26. South wind 10 to 13 mph becoming northwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 80%.

    Low: 26 °F

    Rain then
    Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 32.

    High: 32 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 29.

    High: 29 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Monday Night

    Monday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 19.

    Low: 19 °F

    Chance Snow

Detailed Forecast

Tonight
Clear, with a low around 22. Northwest wind around 5 mph becoming calm after midnight.
Friday
Increasing clouds, with a high near 39. Light and variable wind.
Friday Night
Snow, mainly after 3am. Low around 30. Light southeast wind increasing to 5 to 9 mph in the evening. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Saturday
Snow before 9am, then rain and snow between 9am and 3pm, then rain after 3pm. High near 39. Southeast wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.
Saturday Night
Rain, mainly before midnight. Low around 26. South wind 10 to 13 mph becoming northwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 80%.
Sunday
Mostly cloudy, with a high near 32.
Sunday Night
Mostly cloudy, with a low around 16.
Monday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 29.
Monday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 35.
Tuesday Night
Partly cloudy, with a low around 21.
Wednesday
Mostly sunny, with a high near 43.
Wednesday Night
Mostly cloudy, with a low around 26.
Thursday
Mostly cloudy, with a high near 39.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Valmeyer IL
 38.35°N 90.27°W (Elev. 397 ft)
Last Update:
9:31 pm CST Nov 27, 2025
Forecast Valid:
11pm CST Nov 27, 2025-6pm CST Dec 4, 2025
 
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Additional Resources

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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