This report describes the typical weather at the Subic Bay International Airport (Subic Bay Freeport Zone, Philippines) weather station over the course of an average year. It is based on the historical records from 1999 to 2012. Earlier records are either unavailable or unreliable.
Subic Bay Freeport Zone has a tropical monsoon climate with short dry season. The area within 25 mi of this station is covered by croplands (45%), oceans and seas (42%), and grasslands (13%).
Over the course of a year, the temperature typically varies from 73°F to 93°F and is rarely below 70°F or above 97°F.
The warm season lasts from March 21 to May 11 with an average daily high temperature above 92°F. The hottest day of the year is April 25, with an average high of 93°F and low of 78°F.
The cold season lasts from July 11 to September 23 with an average daily high temperature below 87°F. The coldest day of the year is January 29, with an average low of 73°F and high of 88°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 11:15 hours of daylight; the longest day is June 20 with 13:01 hours of daylight.
The earliest sunrise is at 5:28am on May 29 and the latest sunset is at 6:33pm on July 5. The latest sunrise is at 6:29am on January 23 and the earliest sunset is at 5:26pm on November 19.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover ranges from 38% (mostly clear) to 91% (mostly cloudy). The sky is cloudiest on August 5 and clearest on March 16. The clearer part of the year begins around October 31. The cloudier part of the year begins around May 19.
On March 16, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 71% of the time, and overcast or mostly cloudy 22% of the time.
On August 5, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 88% of the time, and clear or mostly clear 9% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around August 6, occurring in 86% of days. Precipitation is least likely around March 14, occurring in 13% of days.
Over the entire year, the most common forms of precipitation are moderate rain, thunderstorms, and light rain.
Moderate rain is the most severe precipitation observed during 46% of those days with precipitation. It is most likely around August 25, when it is observed during 45% of all days.
Thunderstorms are the most severe precipitation observed during 31% of those days with precipitation. They are most likely around June 22, when it is observed during 34% of all days.
Light rain is the most severe precipitation observed during 18% of those days with precipitation. It is most likely around November 28, when it is observed during 14% of all days.
During the warm season, which lasts from March 21 to May 11, there is a 25% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of moderate rain (39% of days with precipitation have at worst moderate rain), thunderstorms (35%), and light rain (22%).
During the cold season, which lasts from July 11 to September 23, there is a 82% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of moderate rain (49% of days with precipitation have at worst moderate rain), thunderstorms (34%), light rain (11%), and heavy rain (6%).
Either snow is exceptionally unlikely to fall at any time during the year at this location or this station does not reliably report precipitation types.
The relative humidity typically ranges from 44% (comfortable) to 93% (very humid) over the course of the year, rarely dropping below 33% (comfortable) and reaching as high as 99% (very humid).
The air is driest around March 14, at which time the relative humidity drops below 47% (comfortable) three days out of four; it is most humid around September 10, exceeding 92% (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 year, the dew point typically varies from 63°F (mildy humid) to 77°F (oppressive) and is rarely below 59°F (comfortable) or above 79°F (oppressive).
Over the course of the year typical wind speeds vary from 1 mph to 17 mph (calm to moderate breeze), rarely exceeding 28 mph (strong breeze).
The highest average wind speed of 14 mph (moderate breeze) occurs around August 2, at which time the average daily maximum wind speed is 16 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around October 9, at which time the average daily maximum wind speed is 12 mph (moderate breeze).