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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.

A Few Clouds

64°F

18°C

Humidity 96%
Wind Speed Calm
Barometer 30.00 in (1015.5 mb)
Dewpoint 63°F (17°C)
Visibility 7.00 mi
Last update 24 May 4:53 am CDT
Extended Forecast for

Valmeyer IL

  • Overnight

    Overnight: A 40 percent chance of showers. Cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Chance
    Showers

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms, mainly before 2pm. Patchy fog before 7am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 81. North wind 3 to 6 mph.

    High: 81 °F

    Chance
    Showers and
    Patchy Fog
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 60. Northeast wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Partly Cloudy

  • Memorial Day

    Memorial Day: Mostly sunny, with a high near 82. Calm wind becoming east 5 to 7 mph in the morning.

    High: 82 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 63. East wind around 5 mph becoming calm in the evening.

    Low: 63 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: Showers likely, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 81. Chance of precipitation is 70%.

    High: 81 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 85. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A 40 percent chance of showers. Cloudy, with a low around 63. Calm wind.
Sunday
A 40 percent chance of showers and thunderstorms, mainly before 2pm. Patchy fog before 7am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 81. North wind 3 to 6 mph.
Sunday Night
Partly cloudy, with a low around 60. Northeast wind around 5 mph becoming calm in the evening.
Memorial Day
Mostly sunny, with a high near 82. Calm wind becoming east 5 to 7 mph in the morning.
Monday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 63. East wind around 5 mph becoming calm in the evening.
Tuesday
Showers likely, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 81. Chance of precipitation is 70%.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 67.
Thursday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 85.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Friday
Showers and thunderstorms likely. Partly sunny, with a high near 80. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Saturday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 79.
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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:
2:46 am CDT May 24, 2026
Forecast Valid:
5am CDT May 24, 2026-6pm CDT May 30, 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