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

34°F

1°C

Humidity 50%
Wind Speed Calm
Barometer 30.51 in (1033.7 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Last update 11 Jan 5:53 pm CST
Extended Forecast for

3 Miles ENE Valmeyer IL

  • Tonight

    Tonight: Clear, with a low around 26. Calm wind becoming south around 6 mph in the evening.

    Low: 26 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 54. Southwest wind 6 to 9 mph.

    High: 54 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 37. Southwest wind 3 to 8 mph.

    Low: 37 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 62. Southwest wind 8 to 13 mph, with gusts as high as 22 mph.

    High: 62 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 40. West wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 40 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a temperature rising to near 44 by 11am, then falling to around 36 during the remainder of the day. Breezy.

    High: 44 °F⇓

    Partly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 26. Calm wind becoming south around 6 mph in the evening.
Monday
Sunny, with a high near 54. Southwest wind 6 to 9 mph.
Monday Night
Mostly clear, with a low around 37. Southwest wind 3 to 8 mph.
Tuesday
Mostly sunny, with a high near 62. Southwest wind 8 to 13 mph, with gusts as high as 22 mph.
Tuesday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 40. West wind 8 to 11 mph, with gusts as high as 20 mph.
Wednesday
Partly sunny, with a temperature rising to near 44 by 11am, then falling to around 36 during the remainder of the day. Breezy.
Wednesday Night
Partly cloudy, with a low around 19.
Thursday
Mostly sunny, with a high near 36.
Thursday Night
Mostly cloudy, with a low around 28.
Friday
Partly sunny, with a high near 44.
Friday Night
Mostly cloudy, with a low around 24.
Saturday
Partly sunny, with a high near 33.
Saturday Night
Partly cloudy, with a low around 16.
Sunday
Sunny, with a high near 35.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ENE Valmeyer IL
 38.33°N 90.27°W (Elev. 459 ft)
Last Update:
4:36 pm CST Jan 11, 2026
Forecast Valid:
5pm CST Jan 11, 2026-6pm CST Jan 18, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation