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

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

74°F

23°C

Humidity 97%
Wind Speed SW 5 mph
Barometer 29.65 in (1003.6 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 18 Jun 2:53 am CDT
Extended Forecast for

Valmeyer IL

  • Overnight

    Overnight: Partly cloudy, with a low around 70. West wind around 6 mph.

    Low: 70 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers after 2pm. Partly sunny, with a high near 80. Northwest wind 3 to 7 mph.

    High: 80 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 59. Northwest wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 84. Calm wind.

    High: 84 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 84. Chance of precipitation is 80%.

    High: 84 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 63. Chance of precipitation is 90%.

    Low: 63 °F

    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 70. West wind around 6 mph.
Thursday
A 20 percent chance of showers after 2pm. Partly sunny, with a high near 80. Northwest wind 3 to 7 mph.
Thursday Night
Partly cloudy, with a low around 59. Northwest wind around 5 mph becoming calm in the evening.
Juneteenth
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 84. Calm wind.
Friday Night
Mostly cloudy, with a low around 64. Calm wind.
Saturday
Mostly sunny, with a high near 86.
Saturday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67.
Sunday
Showers and possibly a thunderstorm. High near 84. Chance of precipitation is 80%.
Sunday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 63. Chance of precipitation is 90%.
Monday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 59.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Mostly sunny, with a high near 83.
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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:
1:26 am CDT Jun 18, 2026
Forecast Valid:
3am CDT Jun 18, 2026-6pm CDT Jun 24, 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