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.

Fog/Mist

54°F

12°C

Humidity 97%
Wind Speed N 8 mph
Barometer 29.91 in (1012.8 mb)
Dewpoint 53°F (12°C)
Visibility 2.00 mi
Wind Chill52°F (11°C)
Last update 21 Nov 7:53 pm CST
Extended Forecast for

4 Miles NNE Valmeyer IL

  • Tonight

    Tonight: A 30 percent chance of rain, mainly before 1am. Patchy fog. Otherwise, cloudy, with a low around 47. North wind 5 to 8 mph.

    Low: 47 °F

    Chance Rain
    and Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 59. North wind 5 to 7 mph becoming light and variable in the afternoon.

    High: 59 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41. Southwest wind 3 to 5 mph.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 63. Calm wind.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 43. Light southeast wind.

    Low: 43 °F

    Mostly Cloudy

  • Monday

    Monday: Rain, mainly after noon. High near 58. Chance of precipitation is 80%.

    High: 58 °F

    Chance Rain
    then Rain

  • Monday Night

    Monday Night: Rain, mainly before midnight. Low around 50. Chance of precipitation is 80%.

    Low: 50 °F

    Rain then
    Chance Rain

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Partly sunny, with a high near 63.

    High: 63 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 30 percent chance of rain, mainly before 1am. Patchy fog. Otherwise, cloudy, with a low around 47. North wind 5 to 8 mph.
Saturday
Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 59. North wind 5 to 7 mph becoming light and variable in the afternoon.
Saturday Night
Mostly clear, with a low around 41. Southwest wind 3 to 5 mph.
Sunday
Sunny, with a high near 63. Calm wind.
Sunday Night
Mostly cloudy, with a low around 43. Light southeast wind.
Monday
Rain, mainly after noon. High near 58. Chance of precipitation is 80%.
Monday Night
Rain, mainly before midnight. Low around 50. Chance of precipitation is 80%.
Tuesday
A 20 percent chance of rain after noon. Partly sunny, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 35.
Wednesday
Mostly sunny, with a high near 50.
Wednesday Night
Partly cloudy, with a low around 29.
Thanksgiving Day
Mostly sunny, with a high near 48.
Thursday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 30.
Friday
A 20 percent chance of rain. Mostly sunny, with a high near 47.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Valmeyer IL
 38.35°N 90.27°W (Elev. 397 ft)
Last Update:
7:31 pm CST Nov 21, 2025
Forecast Valid:
8pm CST Nov 21, 2025-6pm CST Nov 28, 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