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.

Overcast

24°F

-4°C

Humidity 77%
Wind Speed Calm
Barometer 30.47 in (1032.3 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Last update 1 Dec 3:53 am CST
Extended Forecast for

2 Miles ENE Herculaneum MO

  • Today

    Today: A 40 percent chance of snow, mainly after 4pm. Cloudy, with a high near 31. East wind around 5 mph becoming calm in the morning.

    High: 31 °F

    Mostly Cloudy
    then Chance
    Snow

  • Tonight

    Tonight: Snow, mainly before 11pm. Low around 20. Calm wind becoming northwest around 6 mph after midnight. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    Low: 20 °F

    Snow then
    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 35. Northwest wind around 5 mph becoming calm in the afternoon.

    High: 35 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 21. Calm wind.

    Low: 21 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 44. Calm wind becoming south around 6 mph.

    High: 44 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 27.

    High: 27 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy
    then Chance
    Snow

  • Friday

    Friday: A chance of snow before noon, then a chance of rain and snow. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.

    High: 38 °F

    Chance Snow
    then Chance
    Rain/Snow

Detailed Forecast

Today
A 40 percent chance of snow, mainly after 4pm. Cloudy, with a high near 31. East wind around 5 mph becoming calm in the morning.
Tonight
Snow, mainly before 11pm. Low around 20. Calm wind becoming northwest around 6 mph after midnight. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 35. Northwest wind around 5 mph becoming calm in the afternoon.
Tuesday Night
Mostly clear, with a low around 21. Calm wind.
Wednesday
Partly sunny, with a high near 44. Calm wind becoming south around 6 mph.
Wednesday Night
Mostly cloudy, with a low around 16.
Thursday
Partly sunny, with a high near 27.
Thursday Night
A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 16.
Friday
A chance of snow before noon, then a chance of rain and snow. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.
Friday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 26.
Saturday
Partly sunny, with a high near 44.
Saturday Night
Mostly cloudy, with a low around 25.
Sunday
Mostly cloudy, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Herculaneum MO
 38.27°N 90.36°W (Elev. 377 ft)
Last Update:
4:36 am CST Dec 1, 2025
Forecast Valid:
4am CST Dec 1, 2025-6pm CST Dec 7, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation