December weather forecast
Perobal, Brazil

The first month of the summer, December, is also a moderately hot month in Perobal, Brazil, with temperature in the range of an average low of 20.6°C (69.1°F) and an average high of 29.9°C (85.8°F).

Temperature

Perobal's temperatures peak on average in December, reaching 29.9°C (85.8°F) at their highest and 20.6°C (69.1°F) at their lowest.

Heat index

For December, the heat index is calculated to be a sweltering 37°C (98.6°F). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', ties air temperature with relative humidity to produce the perceived temperature sensation. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

The average relative humidity in December is 80%.

Rainfall

In Perobal, in December, it is raining for 20.5 days, with typically 125mm (4.92") of accumulated precipitation. Throughout the year, in Perobal, there are 176.1 rainfall days, and 1057mm (41.61") of precipitation is accumulated.

Daylight

With an average of 13h and 36min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:37 and sunset at 19:08. On the last day of December, in Perobal, Brazil, sunrise is at 05:49 and sunset at 19:24 -03.

Sunshine

In December, the average sunshine in Perobal is 8.4h.

UV index

The months with the highest UV index are January through March, August through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index of 6 in December converts into the following recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.