National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Valmeyer IL

  • Today

    Today: A 30 percent chance of rain, mainly between 1pm and 5pm. Partly sunny, with a high near 67. Light and variable wind becoming south 5 to 7 mph in the afternoon.

    High: 67 °F

    Chance Rain

  • Tonight

    Tonight: A 20 percent chance of rain before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 31. South wind 5 to 11 mph becoming north in the evening. Winds could gust as high as 20 mph.

    Low: 31 °F

    Slight Chance
    Rain then
    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 48. Northeast wind 8 to 10 mph.

    High: 48 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Rain likely before 10pm, then rain and snow between 10pm and 3am, then rain, snow, and freezing rain after 3am. Low around 34. East wind around 8 mph. Chance of precipitation is 80%. Little or no ice accumulation expected. New snow accumulation of less than a half inch possible.

    Low: 34 °F

    Wintry Mix

  • Monday

    Monday: A chance of rain, snow, and freezing rain before 9am, then a chance of rain. Cloudy, with a high near 44. East wind 7 to 9 mph. Chance of precipitation is 50%.

    High: 44 °F

    Chance Wintry
    Mix then
    Slight Chance
    Rain

  • Monday Night

    Monday Night: Rain. Low around 37. Chance of precipitation is 80%.

    Low: 37 °F

    Rain

  • Tuesday

    Tuesday: Rain and possibly a thunderstorm. High near 62. Chance of precipitation is 80%.

    High: 62 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain, with thunderstorms also possible after midnight. Low around 50. Chance of precipitation is 80%.

    Low: 50 °F

    Rain

  • Wednesday

    Wednesday: Rain likely and possibly a thunderstorm. Cloudy, with a high near 66. Chance of precipitation is 60%.

    High: 66 °F

    Rain Likely

Detailed Forecast

Today
A 30 percent chance of rain, mainly between 1pm and 5pm. Partly sunny, with a high near 67. Light and variable wind becoming south 5 to 7 mph in the afternoon.
Tonight
A 20 percent chance of rain before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 31. South wind 5 to 11 mph becoming north in the evening. Winds could gust as high as 20 mph.
Sunday
Increasing clouds, with a high near 48. Northeast wind 8 to 10 mph.
Sunday Night
Rain likely before 10pm, then rain and snow between 10pm and 3am, then rain, snow, and freezing rain after 3am. Low around 34. East wind around 8 mph. Chance of precipitation is 80%. Little or no ice accumulation expected. New snow accumulation of less than a half inch possible.
Monday
A chance of rain, snow, and freezing rain before 9am, then a chance of rain. Cloudy, with a high near 44. East wind 7 to 9 mph. Chance of precipitation is 50%.
Monday Night
Rain. Low around 37. Chance of precipitation is 80%.
Tuesday
Rain and possibly a thunderstorm. High near 62. Chance of precipitation is 80%.
Tuesday Night
Rain, with thunderstorms also possible after midnight. Low around 50. Chance of precipitation is 80%.
Wednesday
Rain likely and possibly a thunderstorm. Cloudy, with a high near 66. Chance of precipitation is 60%.
Wednesday Night
Rain likely and possibly a thunderstorm before midnight, then a chance of rain. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.
Thursday
A 50 percent chance of rain. Partly sunny, with a high near 72.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 56.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 74. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Valmeyer IL
 38.31°N 90.3°W (Elev. 397 ft)
Last Update:
11:01 am CST Feb 28, 2026
Forecast Valid:
11am CST Feb 28, 2026-6pm CST Mar 6, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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