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

43°F

6°C

Humidity 71%
Wind Speed SW 5 mph
Barometer 30.27 in (1025.1 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 6 Apr 5:53 am CDT
Extended Forecast for

2 Miles ENE Herculaneum MO

  • Today

    Today: Patchy frost before 8am. Otherwise, sunny, with a high near 65. Calm wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 21 mph.

    High: 65 °F

    Patchy Frost
    then Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 39. North wind around 7 mph.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 57. East wind 7 to 11 mph.

    High: 57 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 37. East wind 3 to 6 mph.

    Low: 37 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 73. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 73 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75.

    High: 75 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Patchy frost before 8am. Otherwise, sunny, with a high near 65. Calm wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 21 mph.
Tonight
Partly cloudy, with a low around 39. North wind around 7 mph.
Tuesday
Partly sunny, with a high near 57. East wind 7 to 11 mph.
Tuesday Night
Partly cloudy, with a low around 37. East wind 3 to 6 mph.
Wednesday
Partly sunny, with a high near 73. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 72.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 56.
Friday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55.
Saturday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
Saturday Night
Mostly cloudy, with a low around 61.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Herculaneum MO
 38.27°N 90.36°W (Elev. 377 ft)
Last Update:
4:21 am CDT Apr 6, 2026
Forecast Valid:
6am CDT Apr 6, 2026-6pm CDT Apr 12, 2026
 
Forecast Discussion
 
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Additional Resources

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