September weather forecast
Oranjestad, Aruba

September brings a subtle transition towards the end of summer in Oranjestad, Aruba. Markedly, the area receives the highest rainfall of the year at about 46mm (1.81"), despite having fewer precipitation days as compared to August. The additional rainfall contributes to the overall humidity even though the temperature remains warm. Extended sunlight still looms though the daylight hours start to cut back a bit. However, the incremented sea temperatures dancing at around 29.1°C (84.4°F) continue to entice people towards beach activities.

Temperature

In Oranjestad, temperatures reach their average annual highs in September, measuring 32.7°C (90.9°F) and a minimum average of 26.9°C (80.4°F).

Heat index

In September, the heat index is estimated at a life-threatening hot 45°C (113°F). Stay mindful: Heat exhaustion and heat cramps are likely. Heatstroke could follow extended physical effort.
Note that heat index values are valued for light wind and location in the shade. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

In Oranjestad, the average relative humidity in September is 76.8%.

Rainfall

In Oranjestad, in September, during 3.9 rainfall days, 46mm (1.81") of precipitation is typically accumulated. In Oranjestad, during the entire year, the rain falls for 64.6 days and collects up to 472mm (18.58") of precipitation.

Sea temperature

In September, the average sea temperature in Oranjestad, Aruba, is 29.1°C (84.4°F).
Note: Water temperature ranging from 25°C (77°F) to 29°C (84.2°F) is recognized as warm and pleasant by all, making water activities comfortable and delightful for long durations.

Daylight

The average length of the day in September in Oranjestad is 12h and 11min.
On the first day of September in Oranjestad, sunrise is at 06:29 and sunset at 18:50. On the last day of the month, sunrise is at 06:29 and sunset at 18:30 AST.

Sunshine

In Oranjestad, the average sunshine in September is 6h.

UV index

The months with the highest UV index are February through September, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: In September, the maximum UV index of 12 suggests this advice:
Undertake all key precautions, as unprotected skin and eyes may get burns in no time. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Apply generously and frequently a broad-spectrum SPF 30+ sunscreen every two hours, or immediately after swimming or any outdoor exercise. Attention! The reflection of both water and sand can increase the intensity of UV rays.