December weather forecast
Mata de São João, Brazil

December, the first month of the summer in Mata de São João, is a tropical month, with an average temperature ranging between min 23.6°C (74.5°F) and max 30°C (86°F).

Temperature

Mata de São João signifies an average high-temperature of a hot 30°C (86°F) in December, closely mirroring the 29.4°C (84.9°F) of November. Mata de São João temperatures generally rest at a low of 23.6°C (74.5°F) during the December nights.

Heat index

In December, the average heat index is computed to be a very hot 37°C (98.6°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation 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

In Mata de São João, Brazil, the average relative humidity in December is 76%.

Rainfall

In Mata de São João, in December, it is raining for 13.2 days, with typically 42mm (1.65") of accumulated precipitation. In Mata de São João, Brazil, during the entire year, the rain falls for 209.9 days and collects up to 701mm (27.6") of precipitation.

Daylight

December has the longest days of the year in Mata de São João, with an average of 12h and 54min of daylight.
On the first day of December, sunrise is at 04:58 and sunset at 17:46. On the last day of the month, sunrise is at 05:10 and sunset at 18:01 -03.

Sunshine

The average sunshine in December in Mata de São João is 8.3h.

UV index

January through April, October through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: A typical high UV index of 7 in December suggests the following recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.