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.

Fair

10°F

-12°C

Humidity 73%
Wind Speed Calm
Barometer 30.48 in (1033.0 mb)
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Last update 1 Feb 12:53 am CST
Extended Forecast for

Valmeyer IL

  • Overnight

    Overnight: Mostly clear, with a low around 1. Light southwest wind.

    Low: 1 °F

    Mostly Clear

  • Sunday

    Sunday: A 30 percent chance of snow, mainly after 4pm. Increasing clouds, with a high near 32. Calm wind becoming south 5 to 8 mph in the morning.

    High: 32 °F

    Partly Sunny
    then Chance
    Snow

  • Sunday Night

    Sunday Night: A 30 percent chance of snow, mainly before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 19. South wind 5 to 7 mph becoming light and variable after midnight.

    Low: 19 °F

    Chance Snow
    then Partly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 43. Light and variable wind.

    High: 43 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 26. Calm wind.

    Low: 26 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 34.

    High: 34 °F

    Chance Snow

  • Tuesday Night

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

    Low: 16 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 29.

    High: 29 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 12.

    Low: 12 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 1. Light southwest wind.
Sunday
A 30 percent chance of snow, mainly after 4pm. Increasing clouds, with a high near 32. Calm wind becoming south 5 to 8 mph in the morning.
Sunday Night
A 30 percent chance of snow, mainly before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 19. South wind 5 to 7 mph becoming light and variable after midnight.
Monday
Mostly sunny, with a high near 43. Light and variable wind.
Monday Night
Mostly cloudy, with a low around 26. Calm wind.
Tuesday
A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 34.
Tuesday Night
Mostly cloudy, with a low around 16.
Wednesday
Mostly sunny, with a high near 29.
Wednesday Night
Partly cloudy, with a low around 12.
Thursday
Mostly sunny, with a high near 40.
Thursday Night
Partly cloudy, with a low around 29.
Friday
Mostly sunny, with a high near 48.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Mostly sunny, with a high near 38.
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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:
10:57 pm CST Jan 31, 2026
Forecast Valid:
1am CST Feb 1, 2026-6pm CST Feb 7, 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