Surface observations

Data from the National Weather Service, made available here by the UAlbany Department of Atmospheric and Environmental Sciences

The weather observed at ST. LOUIS, MO (KSTL) at 12:51 PM CST was:
  The skies were mostly cloudy.
  Temperature: 28F ( -2C)  Dewpoint:  18F ( -8C)  Relative Humidity:  64%
  Winds from the NE (050 degs) at  7 mph.
  Pressure: 1017.3 millibars.  Altimeter:30.00 inches of mercury.
  The prevailing visibility was 10 miles.