December weather forecast
Aratuba, Brazil

The first month of the summer, December, is still a hot month in Aratuba, Brazil, with an average temperature fluctuating between 23.1°C (73.6°F) and 32.6°C (90.7°F).

Temperature

The advent of December signifies a minor shift to an average high-temperature of a still hot 32.6°C (90.7°F), aligning closely with November. An average low-temperature of 23.1°C (73.6°F) is expected during December.

Heat index

December's mean heat index is estimated at a blistering 40°C (104°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Understanding the heat index involves considering values for shaded locales with light wind. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', offers an insight into how hot it feels when we factor in moisture content. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant to children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

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

Rainfall

In Aratuba, in December, it is raining for 11.7 days, with typically 25mm (0.98") of accumulated precipitation. In Aratuba, during the entire year, the rain falls for 177 days and collects up to 691mm (27.2") of precipitation.

Daylight

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

Sunshine

In Aratuba, the average sunshine in December is 7.4h.

UV index

The months with the highest UV index in Aratuba, Brazil, are August through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In December, an average UV index of 7 transforms into the following instructions:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. During bright days, sunglasses that offer UVA and UVB defense are recommended.