December weather forecast
Maceió, Brazil

December, the first month of the summer in Maceió, is a tropical month, with an average temperature ranging between min 22°C (71.6°F) and max 30°C (86°F).

Temperature

In December, the average high-temperature is almost the same as in November - a hot 30°C (86°F). In December, in Maceió, the average low-temperature is 22°C (71.6°F).

Heat index

The average heat index in December is evaluated at a sweltering 36.5°C (97.7°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
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 'felt air temperature', 'real feel', 'feels like', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, wind, metabolic differences), and activity. 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 particularly important for children. 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.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in December in Maceió is 75.8%.

Rainfall

In Maceió, it is raining for 9 days, with typically 62.5mm (2.46") of accumulated precipitation. In Maceió, during the entire year, the rain falls for 185 days and collects up to 2070.7mm (81.52") of precipitation.

Sea temperature

In Maceió, Brazil, the average water temperature is 27.4°C (81.3°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

With an average of 12h and 41min of daylight, December has the longest days of the year in Maceió.
On the first day of the month, sunrise is at 04:52 and sunset at 17:31. On the last day of December, sunrise is at 05:05 and sunset at 17:46 -03.

Sunshine

In Maceió, the average sunshine in December is 8.5h.

UV index

The months with the highest UV index in Maceió are January through April, September through December, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an extreme health hazard from unsafe exposure to UV radiation for average individuals.
Note: The average daily UV index of 12 in December transform into the following instructions:
Take all required precautions, as unprotected skin and eyes can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.