The weather observed at NYC/LA GUARDIA, NY (KLGA) at 12:51 PM EDT was: The skies were cloudy. Temperature: 66F ( 19C) Dewpoint: 55F ( 13C) Relative Humidity: 68% Winds from the SE (140 degs) at 17 mph. Pressure: 1008.4 millibars. Altimeter:29.78 inches of mercury. The prevailing visibility was 10 miles.