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

51°F

11°C

Humidity 86%
Wind Speed SE 10 mph
Barometer 29.93 in (1013.6 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 24 Nov 5:53 pm CST
Extended Forecast for

Valmeyer IL

  • Tonight

    Tonight: Rain, mainly before 1am. Patchy fog after 10pm. Low around 51. Southeast wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 100%.

    Low: 51 °F

    Rain and
    Patchy Fog
    then Rain
    Likely and
    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 59. Calm wind becoming west 5 to 8 mph in the morning.

    High: 59 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: A slight chance of rain between 7pm and 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 35. West wind 7 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.

    Low: 35 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 47. West wind 10 to 16 mph, with gusts as high as 28 mph.

    High: 47 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 28. West wind 6 to 8 mph.

    Low: 28 °F

    Partly Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Sunny, with a high near 43.

    High: 43 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 23.

    Low: 23 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 42.

    High: 42 °F

    Partly Sunny

  • Friday Night

    Friday Night: Rain and snow likely, mainly after midnight. Cloudy, with a low around 32. Chance of precipitation is 60%.

    Low: 32 °F

    Rain/Snow
    Likely

Detailed Forecast

Tonight
Rain, mainly before 1am. Patchy fog after 10pm. Low around 51. Southeast wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 100%.
Tuesday
Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 59. Calm wind becoming west 5 to 8 mph in the morning.
Tuesday Night
A slight chance of rain between 7pm and 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 35. West wind 7 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 47. West wind 10 to 16 mph, with gusts as high as 28 mph.
Wednesday Night
Partly cloudy, with a low around 28. West wind 6 to 8 mph.
Thanksgiving Day
Sunny, with a high near 43.
Thursday Night
Mostly clear, with a low around 23.
Friday
Partly sunny, with a high near 42.
Friday Night
Rain and snow likely, mainly after midnight. Cloudy, with a low around 32. Chance of precipitation is 60%.
Saturday
Rain likely, possibly mixed with snow, becoming all rain after noon. Cloudy, with a high near 42. Chance of precipitation is 70%.
Saturday Night
Rain likely. Cloudy, with a low around 33. Chance of precipitation is 60%.
Sunday
A 50 percent chance of rain. Mostly cloudy, with a high near 45.
Sunday Night
A 50 percent chance of rain. Cloudy, with a low around 33.
Monday
A 40 percent chance of rain. Mostly cloudy, with a high near 47.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Valmeyer IL
 38.31°N 90.3°W (Elev. 397 ft)
Last Update:
4:51 pm CST Nov 24, 2025
Forecast Valid:
6pm CST Nov 24, 2025-6pm CST Dec 1, 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