December weather forecast
Rio Brilhante, Brazil

The first month of the summer, December, is still a hot month in Rio Brilhante, Brazil, with temperature in the range of an average high of 30.8°C (87.4°F) and an average low of 21°C (69.8°F).

Temperature

With the onset of December, the average high-temperature registers at a still tropical 30.8°C (87.4°F), subtly different from November's 31°C (87.8°F). Throughout December, the average low-temperature records at a pleasant 21°C (69.8°F).

Heat index

The heat index in December is calculated to be an extremely hot 40°C (104°F). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In December, the average relative humidity is 79%.

Rainfall

In December, in Rio Brilhante, the rain falls for 24.1 days. Throughout December, 137mm (5.39") of precipitation is accumulated. Throughout the year, there are 192.3 rainfall days, and 1062mm (41.81") of precipitation is accumulated.

Daylight

December has the longest days of the year in Rio Brilhante, with an average of 13h and 24min of daylight.
On the first day of December, sunrise is at 04:46 and sunset at 18:08. On the last day of the month, sunrise is at 04:58 and sunset at 18:24 -04.

Sunshine

In December, the average sunshine in Rio Brilhante is 9.5h.

UV index

January through April, July through December, with an average maximum UV index of 6, are months with the highest UV index in Rio Brilhante. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum UV index of 6 in December translates into the following recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.