This report describes the typical weather at the Ninoy Aquino International Airport (Manila International Airport/Villamor Air Base) (Metro Manila, Philippines) weather station over the course of an average December. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Metro Manila has a tropical savanna climate with dry winters. The area within 25 mi of this station is covered by croplands (51%), oceans and seas (27%), lakes and rivers (13%), grasslands (5%), and built-up areas (3%).
The month of December is characterized by essentially constant daily high temperatures, with daily highs around 86°F throughout the month, exceeding 90°F or dropping below 82°F only one day in ten.
Over the course of December, the length of the day is essentially constant. The shortest day of the month is December 15 with 11:17 hours of daylight; the longest day is December 1 with 11:21 hours of daylight.
The earliest sunrise is at 6:05am on December 1; the latest sunset is at 5:37pm on December 31; the latest sunrise is at 6:21am on December 31; the earliest sunset is at 5:25pm on December 2.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover is 55% (partly cloudy) and does not vary substantially over the course of the month.
On December 16, a representative day, the sky is clear or mostly clear 29% of the time, partly cloudy 41% of the time, and mostly cloudy or overcast 28% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around December 1, occurring in 42% of days. Precipitation is least likely around December 31, occurring in 29% of days.
Throughout December, the most common forms of precipitation are moderate rain and light rain.
Moderate rain is the most severe precipitation observed during 57% of those days with precipitation. It is most likely around December 1, when it is observed during 23% of all days.
Light rain is the most severe precipitation observed during 31% of those days with precipitation. It is most likely around December 1, when it is observed during 13% of all days.
Either snow is exceptionally unlikely to fall at this location in December or this station does not reliably report precipitation types.
The relative humidity typically ranges from 61% (mildly humid) to 94% (very humid) over the course of a typical December, rarely dropping below 51% (mildly humid) and reaching as high as 100% (very humid).
The air is driest around December 28, at which time the relative humidity drops below 67% (mildly humid) three days out of four; it is most humid around December 9, rising above 91% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical December, the dew point typically varies from 67°F (muggy) to 75°F (very muggy) and is rarely below 63°F (mildy humid) or above 79°F (oppressive).
Over the course of December typical wind speeds vary from 0 mph to 14 mph (calm to moderate breeze), rarely exceeding 33 mph (high wind).
The highest average wind speed of 6 mph (light breeze) occurs around December 31, at which time the average daily maximum wind speed is 14 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around December 4, at which time the average daily maximum wind speed is 14 mph (moderate breeze).