December weather forecast
Barrocas, Brazil

The first month of the summer, December, is also a hot month in Barrocas, Brazil, with temperature in the range of an average high of 32.3°C (90.1°F) and an average low of 21.2°C (70.2°F).

Temperature

The unfolding of December shows an average high-temperature of a still tropical 32.3°C (90.1°F), indicating a slight variance from November's 31.8°C (89.2°F). The temperature lowers to an average of 21.2°C (70.2°F) during December nights.

Heat index

December's heat index is estimated at a blistering 41°C (105.8°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

The months with the lowest humidity in Barrocas, Brazil, are February, November and December, with an average relative humidity of 69%.

Rainfall

In Barrocas, in December, during 12.1 rainfall days, 36mm (1.42") of precipitation is typically accumulated. Throughout the year, there are 176.7 rainfall days, and 347mm (13.66") of precipitation is accumulated.

Daylight

December has the longest days of the year in Barrocas, with an average of 12h and 48min of daylight.
On the first day of the month, sunrise is at 05:02 and sunset at 17:48. On the last day of December, sunrise is at 05:15 and sunset at 18:03 -03.

Sunshine

In Barrocas, the average sunshine in December is 7.6h.

UV index

January through March, November and December, with an average maximum UV index of 7, are months with the highest UV index in Barrocas. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 7 during December leads to these advisories:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.