The weather observed at NYC/LA GUARDIA, NY (KLGA) at 03:51 PM EST was: The skies were mostly clear. Temperature: 29F ( -2C) Dewpoint: 0F (-18C) Relative Humidity: 28% Winds from the NW (310 degs) at 15 mph. Pressure: 1037.8 millibars. Altimeter:30.65 inches of mercury. The prevailing visibility was 10 miles.