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.

Mostly Cloudy

34°F

1°C

Humidity 42%
Wind Speed S 8 mph
Barometer 29.70 in (1006.2 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 16 Jan 1:53 am CST
Extended Forecast for

Valmeyer IL

  • Overnight

    Overnight: Cloudy early, then clearing, with a low around 28. South wind 5 to 8 mph.

    Low: 28 °F

    Clearing

  • Friday

    Friday: A chance of sprinkles after 4pm. Increasing clouds, with a high near 45. West wind 8 to 14 mph, with gusts as high as 25 mph.

    High: 45 °F

    Chance
    Sprinkles

  • Friday Night

    Friday Night: A slight chance of rain before 8pm, then a chance of snow. Mostly cloudy, with a low around 21. Northwest wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    Low: 21 °F

    Chance
    Rain/Snow
    then Chance
    Snow

  • Saturday

    Saturday: Partly sunny, with a high near 28. West wind 10 to 13 mph, with gusts as high as 22 mph.

    High: 28 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 11. Northwest wind 6 to 9 mph.

    Low: 11 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 16 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 25.

    High: 25 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 9.

    Low: 9 °F

    Mostly Clear

Detailed Forecast

Overnight
Cloudy early, then clearing, with a low around 28. South wind 5 to 8 mph.
Friday
A chance of sprinkles after 4pm. Increasing clouds, with a high near 45. West wind 8 to 14 mph, with gusts as high as 25 mph.
Friday Night
A slight chance of rain before 8pm, then a chance of snow. Mostly cloudy, with a low around 21. Northwest wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Saturday
Partly sunny, with a high near 28. West wind 10 to 13 mph, with gusts as high as 22 mph.
Saturday Night
Mostly clear, with a low around 11. Northwest wind 6 to 9 mph.
Sunday
Mostly sunny, with a high near 31.
Sunday Night
Partly cloudy, with a low around 16.
M.L.King Day
Sunny, with a high near 25.
Monday Night
Mostly clear, with a low around 9.
Tuesday
Sunny, with a high near 38.
Tuesday Night
Mostly clear, with a low around 24.
Wednesday
Mostly sunny, with a high near 46.
Wednesday Night
Partly cloudy, with a low around 22.
Thursday
Mostly sunny, with a high near 43.
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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:
1:26 am CST Jan 16, 2026
Forecast Valid:
1am CST Jan 16, 2026-6pm CST Jan 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