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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.

Overcast

59°F

15°C

Humidity 78%
Wind Speed N 14 mph
Barometer 30.18 in (1021.8 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 20 May 4:53 am CDT
Extended Forecast for

Valmeyer IL

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms. Cloudy, with a low around 55. North wind around 7 mph.

    Low: 55 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 9am. Cloudy, with a high near 67. North wind 6 to 8 mph. Chance of precipitation is 30%.

    High: 67 °F

    Chance
    Showers then
    Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 53. Northeast wind 3 to 6 mph.

    Low: 53 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 72. Northeast wind 5 to 7 mph.

    High: 72 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm, mainly after 4am. Cloudy, with a low around 57. East wind around 8 mph. Chance of precipitation is 60%.

    Low: 57 °F

    Mostly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 73. Chance of precipitation is 90%.

    High: 73 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.

    Low: 60 °F

    Chance
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82.

    High: 82 °F

    Partly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms. Cloudy, with a low around 55. North wind around 7 mph.
Wednesday
A chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 9am. Cloudy, with a high near 67. North wind 6 to 8 mph. Chance of precipitation is 30%.
Wednesday Night
Mostly cloudy, with a low around 53. Northeast wind 3 to 6 mph.
Thursday
Mostly cloudy, with a high near 72. Northeast wind 5 to 7 mph.
Thursday Night
Showers likely and possibly a thunderstorm, mainly after 4am. Cloudy, with a low around 57. East wind around 8 mph. Chance of precipitation is 60%.
Friday
Showers and possibly a thunderstorm. High near 73. Chance of precipitation is 90%.
Friday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.
Saturday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 62.
Sunday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Memorial Day
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Tuesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Valmeyer IL
 38.31°N 90.3°W (Elev. 397 ft)
Last Update:
2:41 am CDT May 20, 2026
Forecast Valid:
5am CDT May 20, 2026-6pm CDT May 26, 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