December weather forecast
Porto Franco, Brazil

December, the first month of the summer in Porto Franco, is also a hot month, with an average temperature ranging between max 31.9°C (89.4°F) and min 22.6°C (72.7°F).

Temperature

In December, the average high-temperature registers at a still tropical 31.9°C (89.4°F), nearly identical to November's 33.5°C (92.3°F). During December nights, Porto Franco records an average temperature of 22.6°C (72.7°F).

Heat index

In December, the average heat index is computed to be an extremely hot 43°C (109.4°F). Be cautious: Heat exhaustion along with heat cramps are predicted. Heatstroke is a possible consequence of continuous physical effort.
When referencing the heat index, its values are suitable for shady environments and light 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 'real feel' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

In Porto Franco, the average relative humidity in December is 77%.

Rainfall

In December, the rain falls for 24.1 days. Throughout December, 100mm (3.94") of precipitation is accumulated. Throughout the year, in Porto Franco, Brazil, there are 208.8 rainfall days, and 1007mm (39.65") of precipitation is accumulated.

Daylight

December has the longest days of the year in Porto Franco, with an average of 12h and 30min of daylight.
On the first day of December in Porto Franco, sunrise is at 05:44 and sunset at 18:12. On the last day of the month, sunrise is at 05:58 and sunset at 18:27 -03.

Sunshine

In December, the average sunshine is 9.3h.

UV index

The months with the highest UV index in Porto Franco, Brazil, are March, May, July through October and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high daily UV index of 7 during December translates into the following directions:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.