December weather forecast
Piritiba, Brazil

December, the first month of the summer in Piritiba, is still a tropical month, with temperature in the range of an average high of 30.2°C (86.4°F) and an average low of 19.2°C (66.6°F).

Temperature

December denotes an average high-temperature of a still hot 30.2°C (86.4°F), identical to November. An average nighttime temperature of 19.2°C (66.6°F) is noted in Piritiba during the month of December.

Heat index

In December, the average heat index is computed to be a very hot 36°C (96.8°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
Note that heat index values are valued for light wind and location in the shade. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is achieved by amalgamating air temperature with the relative humidity readings. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. 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 hold particular importance 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 human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

In December, the average relative humidity in Piritiba is 71%.

Rainfall

In December, in Piritiba, the rain falls for 16.9 days. Throughout December, 68mm (2.68") of precipitation is accumulated. Throughout the year, there are 210.8 rainfall days, and 521mm (20.51") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 12h and 48min of daylight.
On the first day of the month, sunrise is at 05:08 and sunset at 17:54. On the last day of December, in Piritiba, Brazil, sunrise is at 05:21 and sunset at 18:09 -03.

Sunshine

In December, the average sunshine in Piritiba is 7.8h.

UV index

January through April, September through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index, 6 in December, converts into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.