Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
39°F
4°C
| Humidity | 100% |
| Wind Speed | Calm |
| Barometer | 30.37 in (1028.6 mb) |
| Dewpoint | 39°F (4°C) |
| Visibility | 10.00 mi |
| Last update | 19 Oct 3:53 am CDT |
Extended Forecast for
Herculaneum MO
Today
High: 73 °F
Patchy Frost
and Patchy
Fog then
SunnyTonight
Low: 42 °F
Partly Cloudy
Tuesday
High: 74 °F
Sunny
Tuesday Night
Low: 41 °F
Mostly Clear
Wednesday
High: 77 °F
Sunny
Wednesday Night
Low: 43 °F
Clear
Thursday
High: 79 °F
Sunny
Thursday Night
Low: 45 °F
Clear
Friday
High: 78 °F
Sunny
Detailed Forecast
Today
Patchy fog before 8am. Patchy frost before 8am. Otherwise, sunny, with a high near 73. Calm wind.
Tonight
Partly cloudy, with a low around 42. Calm wind.
Tuesday
Sunny, with a high near 74. Calm wind.
Tuesday Night
Mostly clear, with a low around 41. Calm wind.
Wednesday
Sunny, with a high near 77. Calm wind.
Wednesday Night
Clear, with a low around 43.
Thursday
Sunny, with a high near 79.
Thursday Night
Clear, with a low around 45.
Friday
Sunny, with a high near 78.
Friday Night
Mostly clear, with a low around 46.
Saturday
Mostly sunny, with a high near 80.
Saturday Night
Partly cloudy, with a low around 49.
Sunday
Mostly sunny, with a high near 80.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Herculaneum MO
38.27°N 90.39°W (Elev. 456 ft)
38.27°N 90.39°W (Elev. 456 ft)
2:41 am CDT Oct 19, 2026
4am CDT Oct 19, 2026-6pm CDT Oct 25, 2026
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