December weather forecast
Arataca, Brazil

The first month of the summer, December, is a tropical month in Arataca, Brazil, with an average temperature fluctuating between 30°C (86°F) and 19.9°C (67.8°F).

Temperature

The arrival of December brings an average high-temperature of a hot 30°C (86°F), nearly identical to November's 28.6°C (83.5°F). Arataca's nights in December experience an average temperature drop to a refreshing 19.9°C (67.8°F).

Heat index

The heat index for December is evaluated at a sweltering 39°C (102.2°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is the outcome of merging air's temperature and its humidity metrics. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

In Arataca, Brazil, the average relative humidity in December is 83%.

Rainfall

In Arataca, in December, during 19.7 rainfall days, 66mm (2.6") of precipitation is typically accumulated. Throughout the year, there are 238.3 rainfall days, and 592mm (23.31") of precipitation is accumulated.

Daylight

The month with the longest days in Arataca is December, with an average of 13h and 0min of daylight.
On the first day of the month, sunrise is at 04:57 and sunset at 17:56. On the last day of December, sunrise is at 05:10 and sunset at 18:11 -03.

Sunshine

The average sunshine in December in Arataca is 6.6h.

UV index

The months with the highest UV index are January through May, October through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: A daily high UV index of 6 in December leads to these guidelines:
Inhibit overexposure. Warding off sun damage is of utmost importance. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.