December weather forecast
Retirolândia, Brazil

December, the first month of the summer in Retirolândia, is also a hot month, with an average temperature varying between 32.2°C (90°F) and 21.1°C (70°F).

Temperature

Retirolândia notes an average high-temperature of a still tropical 32.2°C (90°F) in December, hardly diverging from November. Retirolândia's temperature lowers to a mean of 21.1°C (70°F) during the nights in December.

Heat index

In December, the heat index is calculated to be an extremely hot 41°C (105.8°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

In December, the average relative humidity in Retirolândia, Brazil, is 69%.

Rainfall

In Retirolândia, in December, during 13.3 rainfall days, 40mm (1.57") of precipitation is typically accumulated. In Retirolândia, during the entire year, the rain falls for 175.1 days and collects up to 358mm (14.09") of precipitation.

Daylight

December has the longest days of the year, with an average of 12h and 48min of daylight.
On the first day of the month, sunrise is at 05:04 and sunset at 17:49. On the last day of December, sunrise is at 05:17 and sunset at 18:04 -03.

Sunshine

In Retirolândia, the average sunshine in December is 7.7h.

UV index

The months with the highest UV index are January, February, November and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.
Note: In December, the maximum UV index of 7 transforms into these recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.