December weather forecast
Acará, Brazil

December, the first month of the summer in Acará, is still a hot month, with temperature in the range of an average low of 22.1°C (71.8°F) and an average high of 32.3°C (90.1°F).

Temperature

The arrival of December coincides with an average high-temperature of a still hot 32.3°C (90.1°F), indicating a minimal shift from November's 34.3°C (93.7°F). Throughout December, an average low-temperature of 22.1°C (71.8°F) is experienced.

Heat index

December's average heat index is calculated to be a blazing hot 46°C (114.8°F). Stay watchful: Heat exhaustion along with heat cramps are likely. Ongoing effort may cause heatstroke.
Heat index values are typically calculated for conditions of shade and a light breeze. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is achieved by amalgamating air temperature with the relative humidity readings. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

In Acará, the average relative humidity in December is 82%.

Rainfall

In Acará, Brazil, during December, the rain falls for 27.8 days and regularly aggregates up to 129mm (5.08") of precipitation. In Acará, Brazil, during the entire year, the rain falls for 306.4 days and collects up to 1513mm (59.57") of precipitation.

Daylight

With an average of 12h and 12min of daylight, December has the longest days of the year in Acará.
On the first day of the month, sunrise is at 05:55 and sunset at 18:08. On the last day of December, in Acará, Brazil, sunrise is at 06:09 and sunset at 18:23 -03.

Sunshine

In Acará, the average sunshine in December is 6.6h.

UV index

The months with the lowest UV index in Acará are January through April, June, November and December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index of 6 during December translates into these guidelines:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. 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. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.