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Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
18°F
-8°C
| Humidity | 62% |
| Wind Speed | W 10 mph |
| Barometer | 30.19 in (1023.1 mb) |
| Dewpoint | 7°F (-14°C) |
| Visibility | 10.00 mi |
| Wind Chill | 6°F (-14°C) |
| Last update | 27 Jan 5:53 am CST |
Extended Forecast for
Herculaneum MO
Today
High: 33 °F
Sunny
Tonight
Low: 2 °F
Partly Cloudy
Wednesday
High: 34 °F
Mostly Sunny
Wednesday Night
Low: 9 °F
Partly Cloudy
Thursday
High: 23 °F
Mostly Cloudy
Thursday Night
Low: 1 °F
Mostly Cloudy
Friday
High: 16 °F
Cold
Friday Night
Low: -2 °F
Partly Cloudy
Saturday
High: 20 °F
Cold
Detailed Forecast
Today
Sunny, with a high near 33. West wind 5 to 8 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Tonight
Partly cloudy, with a low around 2. Light and variable wind.
Wednesday
Mostly sunny, with a high near 34. Calm wind becoming west around 5 mph.
Wednesday Night
Partly cloudy, with a low around 9. Calm wind.
Thursday
Mostly cloudy, with a high near 23. Light north wind.
Thursday Night
Mostly cloudy, with a low around 1.
Friday
Mostly sunny and cold, with a high near 16.
Friday Night
Partly cloudy, with a low around -2.
Saturday
Sunny and cold, with a high near 20.
Saturday Night
Mostly clear, with a low around 0.
Sunday
Partly sunny, with a high near 29.
Sunday Night
Mostly cloudy, with a low around 12.
Monday
Partly sunny, with a high near 37.
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)
4:21 am CST Jan 27, 2026
6am CST Jan 27, 2026-6pm CST Feb 2, 2026
Additional Resources
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Hourly Weather Forecast
