January weather forecast
Oranjestad, Aruba

January, like December, is another hot winter month in Oranjestad, Aruba, with an average temperature fluctuating between 24.5°C (76.1°F) and 30°C (86°F).

Temperature

With an average high-temperature of 30°C (86°F) and an average low-temperature of 24.5°C (76.1°F), January is the coldest month.

Heat index

The average heat index in January is computed to be a very hot 37°C (98.6°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'real feel', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like activity, pregnancy, wind, and metabolic differences affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Oranjestad, Aruba, the average relative humidity in January is 77.5%.

Rainfall

In January, the rain falls for 8.4 days. Throughout January, 39mm (1.54") of precipitation is 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 Oranjestad, the average seawater temperature in January is 27.2°C (81°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In January, the average length of the day in Oranjestad is 11h and 29min.
On the first day of January in Oranjestad, sunrise is at 07:01 and sunset at 18:25. On the last day of the month, sunrise is at 07:05 and sunset at 18:41 AST.

Sunshine

In Oranjestad, the average sunshine in January is 8h.

UV index

The average daily maximum UV index in January in Oranjestad is 10. A UV Index of 8 to 10 symbolizes a very high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 10 in January interpret into the following advice:
Take extra precautions. Protection against sun damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.