This report describes the typical weather at the Queen Beatrix International Airport (Oranjestad, Aruba) weather station over the course of an average May. 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 May is characterized by essentially constant daily high temperatures, with daily highs around 89°F throughout the month, exceeding 91°F or dropping below 86°F only one day in ten.
Over the course of May, the length of the day is essentially constant. The shortest day of the month is May 1 with 12:35 hours of daylight; the longest day is May 31 with 12:49 hours of daylight.
The earliest sunrise is at 6:13am on May 27; the latest sunset is at 7:02pm on May 31; the latest sunrise is at 6:19am on May 1; the earliest sunset is at 6:54pm on May 1.
Daylight savings time (DST) is not observed in 2012.
The median cloud cover is 49% (partly cloudy) and does not vary substantially over the course of the month.
On May 16, a representative day, the sky is clear or mostly clear 30% of the time, partly cloudy 32% of the time, and mostly cloudy or overcast 16% of the time.
The average probability that some form of precipitation will be observed in a given day is 18%, with little variation over the course of the month.
Throughout May, the most common forms of precipitation are moderate rain, light rain, and thunderstorms.
Moderate rain is the most severe precipitation observed during 74% of those days with precipitation. It is most likely around May 31, when it is observed during 15% of all days.
Light rain is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around May 27, when it is observed during 3% of all days.
Thunderstorms are the most severe precipitation observed during 12% of those days with precipitation. They are most likely around May 31, when it is observed during 3% of all days.
Either snow is exceptionally unlikely to fall at this location in May or this station does not reliably report precipitation types.
The relative humidity typically ranges from 64% (mildly humid) to 87% (very humid) over the course of a typical May, rarely dropping below 58% (mildly humid), or exceeding 95% (very humid).
The air is driest around May 28, at which time the relative humidity drops below 67% (mildly humid) three days out of four; it is most humid around May 12, 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 May, the dew point typically varies from 73°F (very muggy) to 77°F (oppressive) and is rarely below 71°F (very muggy) or above 80°F (very oppressive).
Over the course of May typical wind speeds vary from 13 mph to 24 mph (moderate breeze to strong breeze), rarely exceeding 28 mph (strong breeze).
The highest average wind speed of 19 mph (fresh breeze) occurs around May 31, at which time the average daily maximum wind speed is 24 mph (strong breeze).
The lowest average wind speed of 18 mph (moderate breeze) occurs around May 1, at which time the average daily maximum wind speed is 23 mph (fresh breeze).