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.

Fair

47°F

8°C

Humidity 44%
Wind Speed S 9 G 20 mph
Barometer 29.85 in (1011.0 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 13 Mar 12:53 am CDT
Extended Forecast for

2 Miles WSW Valmeyer IL

  • Overnight

    Overnight: Partly cloudy, with a low around 43. South wind around 14 mph, with gusts as high as 26 mph.

    Low: 43 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 63. Southwest wind 8 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.

    High: 63 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 36. Light and variable wind.

    Low: 36 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 69. Light and variable wind becoming southeast 5 to 9 mph in the morning.

    High: 69 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 55. South wind 6 to 9 mph, with gusts as high as 21 mph.

    Low: 55 °F

    Mostly Cloudy

  • Sunday

    Sunday: Rain, with thunderstorms also possible after 4pm. High near 70. Chance of precipitation is 80%.

    High: 70 °F

    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: Rain before 10pm, then snow, possibly mixed with rain between 10pm and 1am, then a chance of snow after 1am. Some thunder is also possible. Low around 21. Chance of precipitation is 90%.

    Low: 21 °F

    Rain/Snow

  • Monday

    Monday: A 20 percent chance of snow before 1pm. Partly sunny, with a high near 31.

    High: 31 °F

    Slight Chance
    Snow

  • Monday Night

    Monday Night: Mostly clear, with a low around 12.

    Low: 12 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 43. South wind around 14 mph, with gusts as high as 26 mph.
Friday
Mostly sunny, with a high near 63. Southwest wind 8 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.
Friday Night
Mostly clear, with a low around 36. Light and variable wind.
Saturday
Mostly sunny, with a high near 69. Light and variable wind becoming southeast 5 to 9 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 55. South wind 6 to 9 mph, with gusts as high as 21 mph.
Sunday
Rain, with thunderstorms also possible after 4pm. High near 70. Chance of precipitation is 80%.
Sunday Night
Rain before 10pm, then snow, possibly mixed with rain between 10pm and 1am, then a chance of snow after 1am. Some thunder is also possible. Low around 21. Chance of precipitation is 90%.
Monday
A 20 percent chance of snow before 1pm. Partly sunny, with a high near 31.
Monday Night
Mostly clear, with a low around 12.
Tuesday
Mostly sunny, with a high near 39.
Tuesday Night
Mostly cloudy, with a low around 27.
Wednesday
Partly sunny, with a high near 62.
Wednesday Night
Partly cloudy, with a low around 40.
Thursday
Sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Valmeyer IL
 38.29°N 90.36°W (Elev. 397 ft)
Last Update:
1:25 am CDT Mar 13, 2026
Forecast Valid:
1am CDT Mar 13, 2026-6pm CDT Mar 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation