The weather observed at NYC/LA GUARDIA, NY (KLGA) at 04:51 PM EDT was: The skies were mostly cloudy. The weather reported was a thunderstorm. Temperature: 88F ( 31C) Dewpoint: 63F ( 17C) Relative Humidity: 43% Winds from the S (190 degs) at 15 mph. Pressure: 1012.6 millibars. Altimeter:29.90 inches of mercury. The prevailing visibility was 10 miles.