Monthly weather forecast and climate

Flag of Aruba
Flag of Aruba

The climate of Aruba

Aruba experiences a hot semi-arid type of climate (Köppen climate classification BSh). The climate is tropical and remains hot throughout the year. Aruba is a tropical island and a constituent country of the Netherlands in the South Caribbean Sea. The Dutch Caribbean Island is just 18 miles north of Venezuela and 620 miles west from the main Lesser Antilles region. Aruba, Bonaire, and Curacao constitute the ABC Islands that lie outside the Hurricane Alley of the Caribbean. Northeast trade winds prevail for 9 months of the year to reduce the effect of the tropical sun. The proximity to the equator, trade winds, and the vast waters of the Caribbean Sea and the Atlantic Ocean influence the climate.

Aruba is a flat, small island, which lies just 12°N of the equator. The land area measures 180 square meters, with a diagonal length of 20 miles from the northwest to the southeast and maximum width of 6 miles. The landscape is arid and cactus-strewn, unlike the rest of the Caribbean. The vegetation is short, and there are no rivers, natural lakes, or streams on the island. The hinterland has few rolling hills, such as Hooiberg, with an altitude of 165 meters. The shore areas are mainly of limestone, rocky cliffs, and coral reefs. White sandy beaches dot the western and southern coasts in the protection of calm waters. Coral reefs and clear waters make the southern beaches a popular tourist destination. The northern and eastern coasts face rough seas due to strong ocean currents. Swimming is risky on the northern shores due to rocky coasts and strong currents. Mount Jamanota is the highest point in Aruba at 188 meters above sea level.

Aruba has a long, dry season from January to September and a short, wet season from October to December. The monthly mean temperatures vary little between a low of 26.7°C (80.1°F) in January and a high of 29.4°C (84.9°F) in September. Summers are hot and dry. The average high temperatures touch the 32.7°C (90.9°F) mark at the peak of September but rarely register above 37.8°C (100°F). Microclimatic differences exist between coastal and interior areas as well as windward and leeward sides of the island. Predominantly easterly winds moderate the temperatures. Winters are warm and sunny, with the average low temperatures at 24.4°C (75.9°F) in January. The period from October to December has the highest average monthly humidity above 26.1°C (79°F). The wet season is prone to heavy rainfall amid thunderstorms and tropical storms. Hurricanes occasionally occur between August to October.

Aruba receives scarce average precipitation of 469.9mm (18.5") annually. Extreme variations register rainfall between 152.4mm (6") in El Nino years to 1016mm (40") in the La Nina periods. The northern coast receives relatively higher rainfall than the southern and western coasts and the interior. The wettest period is from October to December, while the driest months are March and April. The rainy season contributes to 70% of the annual precipitation. The yearly sunshine registers an abundant 3000 hours, with at least 8 hours of sunlight every day. The average monthly relative humidity ranges from 75% to 79%, with the least 75% in March. The average wind speeds remain above 29.6km/h (18.4mph) in the windy part of the year between December and August. The calm period between September and November registers average wind speeds below 24.6km/h (15.3mph). The average sea temperatures register in the 26.1°C (79°F) to 28.9°C (84°F) range during the year and are the warmest in October.

The highest temperature on record in Oranjestad, the capital, is 36.5°C (97.7°F), while the record for the lowest temperature is 20.5°C (68.9°F).

The best time to visit Aruba

The best time to visit Aruba is from late December to mid-March in the dry season. The third week of January has the most comfortable conditions, with temperatures between 24.4°C (75.9°F) to 30°C (86°F). The daily sunshine is for 8 hours, and the daylight lasts for 12 hours. The moderate wind speeds between 24.1km/h (15mph) to 25.7km/h (16mph) delight the surfers and sailing enthusiasts. Tropical storms and cyclones are few, as the tropical island with white sandy beaches and tranquil waters delights the visitors. December to March is the brightest part of the year, with clear skies up to 54% of the time.

The worst time to visit Aruba

The worst time to visit Aruba is during the hot and sultry summer from June to September. The intense sunshine lasts for a daily average of 9 hours during the hot season, with a peak of 10 hours in July. Temperatures touch the 33.3°C (91.9°F) mark during the day, and the heat is oppressive. The humidity increases the heat index in the latter half of the summer, and the days are uncomfortable. The skies remain cloudy up to 82% of the time. The interior is hotter than the coast, which receives relief from the trade winds. The tropical storm season brings uncertain weather to the island and the surrounding seas.

Weather hazards

Aruba is prone to weather hazards, such as hurricanes, droughts, flash floods, and tsunamis. Tropical storms frequently occur between June and November and bring damaging winds and heavy rainfall. August to October is the season of storms, but hurricanes are rare and usually do not scale category one or category two. Hurricanes, such as Ivan in September 2004, and Omar in October 2008 hit Aruba hard, even though its location on the southern edge of the hurricane belt is relatively safe from the storms. Droughts are regular due to low precipitation and lack of freshwater resources. The desalination of seawater caters to the needs of the inhabitants and the visitors.

Weather in January

January is the coldest month of the year in Aruba, with the average temperatures in the comfortable range of 24.4°C (75.9°F) to 30°C (86°F). The precipitation is in the form of light showers that hardly accumulates 40.6mm (1.6") in the month. Weather in January »

Weather in February

February is hot and dry in Aruba, with hardly 5 wet days and less than 20.3mm (0.8") of precipitation. The average temperatures in Oranjestad are in the zone of 24.4°C (75.9°F) to 30.6°C (87.1°F), with hot days and warm nights. Weather in February »

Weather in March

March is often the driest month of the year in Aruba, with hardly any rain. The rain gods may send a few light showers or entirely skip the island. The average temperatures register a slight increase but are still in the comfortable 25°C (77°F) to 31.1°C (88°F) zone. The daily sunshine lasts for 8 hours, with cloudy skies for 50% to 60% of the time. Weather in March »

Weather in April

April is hot and dry in Aruba, with 8 hours of glorious sunshine every day. Oranjestad registers average temperatures in the warm 25.6°C (78.1°F) to hot 31.7°C (89.1°F) range. Temperatures in Savaneta range between 25.6°C (78.1°F) and 31.1°C (88°F). Weather in April »

Weather in May

May registers average temperatures between 22.8°C (73°F) to 31.1°C (88°F) and is hot in Aruba. The daylight increases gradually to 12 hours and 49 minutes by the month-end. Temperatures in Noord are in the 23.3°C (73.9°F) to 31.1°C (88°F) range, which rarely exceed 32.2°C (90°F) or fall below 22.2°C (72°F). Early risers find the morning air relaxing, with the sun usually in the sky by 6.15 a.m. Weather in May »

Weather in June

June brings the hot summer to Aruba, with average temperatures in the range of 26.1°C (79°F) to 31.1°C (88°F). Temperatures in Santa Cruz rarely exceed 32.8°C (91°F) or fall below 25°C (77°F), and the average monthly humidity is constant at 77%. Weather in June »

Weather in July

July witnesses the hot summer season in Aruba, which brings negligible rainfall of 30.5mm (1.2") to 38.1mm (1.5"). The average temperatures are in the range of 26.7°C (80.1°F) to 32.2°C (90°F), but rarely exceed 33.3°C (91.9°F) or drop below 24.4°C (75.9°F). Weather in July »

Weather in August

August is hot and dry in Aruba, with the average temperatures in the zone of 26.7°C (80.1°F) to 32.8°C (91°F). Temperatures usually do not surpass 35°C (95°F). The hot and humid conditions induce much sweat, and the best attire is light summer clothing, such as sweatshirts and shorts. The precipitation of 27.9mm (1.1") hardly moves the scale with 4 wet days in the month. Weather in August »

Weather in September

September is the peak of the summer in Aruba, with average temperatures between 26.7°C (80.1°F) to 32.8°C (91°F). The precipitation sees a slight increase to 45.7mm (1.8") in anticipation of the wet season ahead. The average temperatures in Angochi are in the range of 27.2°C (81°F) to 32.2°C (90°F), and the heat index is at its peak. The skies tend to be cloudy for 76% to 81% of the time. Weather in September »

Weather in October

October begins the wet season in Aruba, which brings moderate rainfall. The precipitation is in the form of thunderstorms and downpour that accumulates 78.7mm (3.1") in the month. The average temperatures register in the hot 26.1°C (79°F) to 32.2°C (90°F) range. Weather in October »

Weather in November

November is the wettest month of the year in Aruba, which brings 88.9mm (3.5") to 101.6mm (4") of rainfall. With 11 wet days in the month, there is ample daily sunshine of 8 hours. The conditions are muggy, with the average monthly humidity at 79%, the highest of the year. The seawaters at 27.8°C (82°F) see only a few enthusiastic swimmers. Weather in November »

Weather in December

December is a wet month in Aruba, with a transition towards the dry season in the last week. The precipitation registers up to 78.7mm (3.1"), with 11 wet days in the month. Oranjestad records a slight decrease in heat, with average temperatures in the range of 25°C (77°F) to 30.6°C (87.1°F). December 20 is the shortest day of the year, with 11 hours and 24 minutes of daylight. Weather in December »


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