December weather forecast
Aratuba, Brazil

December, the first month of the summer in Aratuba, is also a hot month, with an average temperature ranging between max 32.6°C (90.7°F) and min 23.1°C (73.6°F).

Temperature

The arrival of December denotes a barely perceptible change in the average high-temperatures to a still tropical 32.6°C (90.7°F) from November's 33.5°C (92.3°F). In Aratuba, an average low-temperature of 23.1°C (73.6°F) is recorded during December nights.

Heat index

For most parts of December, the heat index is computed to be a scorching 40°C (104°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', unifies temperature and humidity readings to offer a comprehensive feel of warmth. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical for babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

In Aratuba, the average relative humidity in December is 65%.

Rainfall

In Aratuba, during December, the rain falls for 11.7 days and regularly aggregates up to 25mm (0.98") of precipitation. Throughout the year, there are 177 rainfall days, and 691mm (27.2") of precipitation is accumulated.

Daylight

December has the longest days of the year, with an average of 12h and 24min of daylight.
On the first day of December, sunrise is at 05:14 and sunset at 17:36. On the last day of the month, sunrise is at 05:28 and sunset at 17:50 -03.

Sunshine

In December, the average sunshine is 7.4h.

UV index

The months with the highest UV index are August through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 7 translates into these guidelines:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.