December weather forecastBoca da Mata, Brazil

Weather in December

December, the first month of the summer in Boca da Mata, is still a hot month, with an average temperature ranging between max 31.2°C (88.2°F) and min 21.9°C (71.4°F).

Temperature

The shift to December signals an average high-temperature of a still tropical 31.2°C (88.2°F), subtly varied from November's 30.6°C (87.1°F). Boca da Mata records an average low of 21.9°C (71.4°F) throughout the nights in December.

Heat index

For December, the heat index is estimated at a sweltering 39°C (102.2°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'real feel', gives a temperature feeling by integrating air temperature and humidity. 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. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are quite important for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

December is the least humid month in Boca da Mata, with an average relative humidity of 73%.

Rainfall

In Boca da Mata, Brazil, during December, the rain falls for 9.9 days and regularly aggregates up to 13mm (0.51") of precipitation. Throughout the year, there are 189 rainfall days, and 375mm (14.76") of precipitation is accumulated.

Daylight

With an average of 12h and 42min of daylight, December has the longest days of the year.
On the first day of December, sunrise is at 04:54 and sunset at 17:33. On the last day of the month, sunrise is at 05:07 and sunset at 17:48 -03.

Sunshine

The month with the most sunshine in Boca da Mata is December, with an average of 8.2h of sunshine.

UV index

The months with the highest UV index are January through March, November and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 7 in December translates into these instructions:
Guard oneself from overexposure. Defence against sun injury is vital. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.