December weather forecast
Portel, Brazil

December, the first month of the summer in Portel, is still a hot month, with an average temperature ranging between min 22.9°C (73.2°F) and max 32.8°C (91°F).

Temperature

As Portel transitions from November to December, the average high-temperatures adjust to a still tropical 32.8°C (91°F), nearly the same as the previous 34.7°C (94.5°F). Portel, in December, experiences an average temperature of 22.9°C (73.2°F) at night.

Heat index

The heat index in December is computed to be a life-threatening hot 47°C (116.6°F). Attention: Heat exhaustion and heat cramps are quite likely. Heatstroke becomes a risk with continued exertion.
Heat index specifics point out values are for conditions of shade and a slight breeze. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

In Portel, the average relative humidity in December is 79%.

Rainfall

In Portel, during December, the rain falls for 25.5 days and regularly aggregates up to 140mm (5.51") of precipitation. In Portel, during the entire year, the rain falls for 282.9 days and collects up to 1449mm (57.05") of precipitation.

Daylight

The month with the longest days in Portel, Brazil, is December, with an average of 12h and 12min of daylight.
On the first day of December in Portel, sunrise is at 06:05 and sunset at 18:19. On the last day of the month, sunrise is at 06:19 and sunset at 18:33 -03.

Sunshine

The average sunshine in December in Portel is 6.9h.

UV index

The months with the lowest UV index are January through April and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In December, a regular UV index of 6 translates into these guidelines:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.