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NWS St. Louis Announces Changes To May 16, 2025 Tornado Damage Assessment

After a year-long review of new ground survey data and aerial imagery, NWS St. Louis made several adjustments to the May 16, 2025 tornado damage assessment. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Mostly Cloudy

68°F

20°C

Humidity 65%
Wind Speed N 9 mph
Barometer 30.13 in (1020.2 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 21 May 11:53 am CDT
Extended Forecast for

Valmeyer IL

  • This Afternoon

    This Afternoon: Increasing clouds, with a high near 71. Northeast wind 5 to 7 mph.

    High: 71 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around 58. Northeast wind 3 to 8 mph.

    Low: 58 °F

    Mostly Cloudy

  • Friday

    Friday: Scattered showers, mainly after 9am. Cloudy, with a high near 69. Northeast wind 5 to 7 mph. Chance of precipitation is 50%.

    High: 69 °F

    Scattered
    Showers

  • Friday Night

    Friday Night: Scattered showers, mainly after midnight. Mostly cloudy, with a low around 58. North wind around 6 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 58 °F

    Scattered
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. Light west wind.

    High: 82 °F

    Partly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 81. Chance of precipitation is 70%.

    High: 81 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Memorial Day

    Memorial Day: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.

    High: 82 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
Increasing clouds, with a high near 71. Northeast wind 5 to 7 mph.
Tonight
Mostly cloudy, with a low around 58. Northeast wind 3 to 8 mph.
Friday
Scattered showers, mainly after 9am. Cloudy, with a high near 69. Northeast wind 5 to 7 mph. Chance of precipitation is 50%.
Friday Night
Scattered showers, mainly after midnight. Mostly cloudy, with a low around 58. North wind around 6 mph becoming calm in the evening. Chance of precipitation is 40%.
Saturday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. Light west wind.
Saturday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 81. Chance of precipitation is 70%.
Sunday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 62.
Memorial Day
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 40%.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
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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:
12:01 pm CDT May 21, 2026
Forecast Valid:
12pm CDT May 21, 2026-6pm CDT May 27, 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