This report describes the typical weather at the Queen Beatrix International Airport (Oranjestad, Aruba) weather station over the course of an average August. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Oranjestad has a hot desert climate. The area within 25 mi of this station is covered by oceans and seas (95%) and grasslands (2%).
The month of August is characterized by essentially constant daily high temperatures, with daily highs around 90°F throughout the month, exceeding 93°F or dropping below 87°F only one day in ten.
Over the course of August, the length of the day is essentially constant. The shortest day of the month is August 31 with 12:22 hours of daylight; the longest day is August 1 with 12:39 hours of daylight.
The earliest sunrise is at 6:26am on August 4; the latest sunset is at 7:06pm on August 1; the latest sunrise is at 6:29am on August 25; the earliest sunset is at 6:51pm on August 31.
Daylight savings time (DST) is not observed in 2012.
The median cloud cover is 44% (partly cloudy) and does not vary substantially over the course of the month.
On August 16, a representative day, the sky is clear or mostly clear 35% of the time, partly cloudy 30% of the time, and mostly cloudy or overcast 11% of the time.
The average probability that some form of precipitation will be observed in a given day is 25%, with little variation over the course of the month.
Throughout August, the most common forms of precipitation are moderate rain and thunderstorms.
Moderate rain is the most severe precipitation observed during 65% of those days with precipitation. It is most likely around August 1, when it is observed during 18% of all days.
Thunderstorms are the most severe precipitation observed during 24% of those days with precipitation. They are most likely around August 31, when it is observed during 7% of all days.
Either snow is exceptionally unlikely to fall at this location in August or this station does not reliably report precipitation types.
The relative humidity typically ranges from 62% (mildly humid) to 86% (very humid) over the course of a typical August, rarely dropping below 55% (mildly humid), or exceeding 93% (very humid).
The air is driest around August 16, at which time the relative humidity drops below 65% (mildly humid) three days out of four; it is most humid around August 1, rising above 84% (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 August, the dew point typically varies from 74°F (very muggy) to 78°F (oppressive) and is rarely below 72°F (very muggy) or above 80°F (very oppressive).
Over the course of August typical wind speeds vary from 11 mph to 23 mph (gentle breeze to fresh breeze), rarely exceeding 28 mph (strong breeze).
The highest average wind speed of 18 mph (fresh breeze) occurs around August 1, at which time the average daily maximum wind speed is 23 mph (fresh breeze).
The lowest average wind speed of 16 mph (moderate breeze) occurs around August 31, at which time the average daily maximum wind speed is 22 mph (fresh breeze).