December weather forecast
Ribeirão dos Índios, Brazil

The first month of the summer, December, is still a tropical month in Ribeirão dos Índios, Brazil, with an average temperature fluctuating between 30.6°C (87.1°F) and 21.7°C (71.1°F).

Temperature

December's onset brings an average high-temperature of a still hot 30.6°C (87.1°F), showing a minute difference from November's 31.2°C (88.2°F). An average low-temperature of 21.7°C (71.1°F) is common during the nights of December.

Heat index

For most parts of December, the heat index is computed to be a sweltering 39°C (102.2°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
Records show heat index calculations are tailored for shaded regions and mild winds. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

In Ribeirão dos Índios, the average relative humidity in December is 78%.

Rainfall

In December, the rain falls for 23.9 days. Throughout December, 151mm (5.94") of precipitation is accumulated. In Ribeirão dos Índios, during the entire year, the rain falls for 190.4 days and collects up to 1184mm (46.61") of precipitation.

Daylight

With an average of 13h and 24min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:34 and sunset at 18:56. On the last day of December, sunrise is at 05:46 and sunset at 19:12 -03.

Sunshine

The average sunshine in December is 8h.

UV index

The average daily maximum UV index in December is 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 6 during December translates into the following guidance:
Ward off overexposure. Defence against solar harm is crucial. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.