December Weather in Aruba Aruba
Daily high temperatures are around 86°F, rarely falling below 83°F or exceeding 89°F.
Daily low temperatures are around 78°F, rarely falling below 75°F or exceeding 81°F.
For reference, on September 5, the hottest day of the year, temperatures in Aruba typically range from 81°F to 91°F, while on January 20, the coldest day of the year, they range from 77°F to 85°F.
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on December. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
The month of December in Aruba experiences rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 68% to 52%.
The clearest day of the month is December 31, with clear, mostly clear, or partly cloudy conditions 48% of the time.
For reference, on October 8, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 81%, while on January 18, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 53%.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Aruba, the chance of a wet day over the course of December is very rapidly decreasing, starting the month at 19% and ending it at 11%.
For reference, the year's highest daily chance of a wet day is 20% on November 25, and its lowest chance is 2% on March 22.
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during December in Aruba is decreasing, starting the month at 1.6 inches, when it rarely exceeds 4.7 inches, and ending the month at 0.6 inches, when it rarely exceeds 1.9 inches.
Over the course of December in Aruba, the length of the day is essentially constant. The shortest day of the month is December 21, with 11 hours, 24 minutes of daylight and the longest day is December 1, with 11 hours, 27 minutes of daylight.
The earliest sunrise of the month in Aruba is 6:45 AM on December 1 and the latest sunrise is 15 minutes later at 7:00 AM on December 31.
The earliest sunset is 6:12 PM on December 1 and the latest sunset is 13 minutes later at 6:24 PM on December 31.
Daylight saving time is not observed in Aruba during 2023.
For reference, on June 21, the longest day of the year, the Sun rises at 6:15 AM and sets 12 hours, 52 minutes later, at 7:07 PM, while on December 22, the shortest day of the year, it rises at 6:56 AM and sets 11 hours, 24 minutes later, at 6:20 PM.
The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.
The figure below presents a compact representation of key lunar data for December 2023. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
The chance that a given day will be muggy in Aruba is essentially constant during December, remaining around 100% throughout.
For reference, on January 1, the muggiest day of the year, there are muggy conditions 100% of the time, while on March 8, the least muggy day of the year, there are muggy conditions 100% of the time.
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in Aruba is increasing during December, increasing from 17.9 miles per hour to 19.5 miles per hour over the course of the month.
For reference, on June 19, the windiest day of the year, the daily average wind speed is 21.5 miles per hour, while on October 21, the calmest day of the year, the daily average wind speed is 15.3 miles per hour.
The hourly average wind direction in Aruba throughout December is predominantly from the east, with a peak proportion of 99% on December 22.
Aruba is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in Aruba is gradually decreasing during December, falling by 2°F, from 82°F to 80°F, over the course of the month.
Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).
Temperatures in Aruba are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.
The average accumulated growing degree days in Aruba are very rapidly increasing during December, increasing by 936°F, from 10,850°F to 11,786°F, over the course of the month.
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy in Aruba is gradually increasing during December, rising by 0.5 kWh, from 4.9 kWh to 5.4 kWh, over the course of the month.
For the purposes of this report, the geographical coordinates of Aruba are 12.500 deg latitude, -69.967 deg longitude, and 0 ft elevation.
The topography within 2 miles of Aruba is essentially flat, with a maximum elevation change of 0 feet and an average elevation above sea level of 0 feet. Within 10 miles is also essentially flat (0 feet). Within 50 miles is also essentially flat (0 feet).
The area within 2 miles of Aruba is covered by grassland (48%), artificial surfaces (18%), trees (16%), and shrubs (14%), within 10 miles by water (82%), and within 50 miles by water (91%).
This report illustrates the typical weather in Aruba, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
The details of the data sources used for this report can be found on the Queen Beatrix International Airport page.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.
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