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.

A Few Clouds

68°F

20°C

Humidity 53%
Wind Speed SW 6 mph
Barometer 29.95 in (1013.7 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 13 May 12:53 am CDT
Extended Forecast for

Valmeyer IL

  • Overnight

    Overnight: Mostly cloudy early, then clearing, with a low around 58. West wind around 7 mph becoming northwest.

    Low: 58 °F

    Clearing

  • Wednesday

    Wednesday: Sunny, with a high near 75. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 48. North wind 5 to 7 mph becoming calm in the evening.

    Low: 48 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 76. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 76 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 57. Southeast wind 7 to 9 mph. Chance of precipitation is 40%.

    Low: 57 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 89.

    High: 89 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.

    Low: 67 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.

    High: 89 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 67.

    Low: 67 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Mostly cloudy early, then clearing, with a low around 58. West wind around 7 mph becoming northwest.
Wednesday
Sunny, with a high near 75. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Clear, with a low around 48. North wind 5 to 7 mph becoming calm in the evening.
Thursday
Sunny, with a high near 76. Calm wind becoming southeast around 6 mph in the afternoon.
Thursday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 57. Southeast wind 7 to 9 mph. Chance of precipitation is 40%.
Friday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 89.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Saturday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 67.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Monday
Showers and thunderstorms likely. Partly sunny, with a high near 91. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.
Tuesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 84. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Valmeyer IL
 38.29°N 90.3°W (Elev. 515 ft)
Last Update:
9:21 pm CDT May 12, 2026
Forecast Valid:
1am CDT May 13, 2026-6pm CDT May 19, 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