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

27°F

-3°C

Humidity 58%
Wind Speed Calm
Barometer 30.17 in (1022.2 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Last update 2 Feb 2:53 am CST
Extended Forecast for

Valmeyer IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 21. Light south wind.

    Low: 21 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 41. Calm wind becoming east around 5 mph in the afternoon.

    High: 41 °F

    Partly Sunny

  • Monday Night

    Monday Night: Cloudy, with a low around 28. East wind 3 to 5 mph.

    Low: 28 °F

    Cloudy

  • Tuesday

    Tuesday: A slight chance of snow before noon, then a slight chance of rain and snow between noon and 2pm, then a slight chance of snow after 2pm. Mostly cloudy, with a high near 35. Calm wind becoming north 5 to 7 mph in the morning. Chance of precipitation is 20%.

    High: 35 °F

    Slight Chance
    Snow then
    Slight Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 18. North wind around 6 mph becoming calm in the evening.

    Low: 18 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 32.

    High: 32 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 15.

    Low: 15 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 21. Light south wind.
Monday
Partly sunny, with a high near 41. Calm wind becoming east around 5 mph in the afternoon.
Monday Night
Cloudy, with a low around 28. East wind 3 to 5 mph.
Tuesday
A slight chance of snow before noon, then a slight chance of rain and snow between noon and 2pm, then a slight chance of snow after 2pm. Mostly cloudy, with a high near 35. Calm wind becoming north 5 to 7 mph in the morning. Chance of precipitation is 20%.
Tuesday Night
Mostly cloudy, with a low around 18. North wind around 6 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 32.
Wednesday Night
Partly cloudy, with a low around 15.
Thursday
Mostly sunny, with a high near 43.
Thursday Night
Mostly clear, with a low around 33.
Friday
Sunny, with a high near 48.
Friday Night
Mostly clear, with a low around 21.
Saturday
Sunny, with a high near 40.
Saturday Night
Partly cloudy, with a low around 25.
Sunday
Mostly sunny, with a high near 46.
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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:
3:16 am CST Feb 2, 2026
Forecast Valid:
3am CST Feb 2, 2026-6pm CST Feb 8, 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