December weather forecastEsplanada, Brazil

Weather in December

December, the first month of the summer in Esplanada, is still a hot month, with an average temperature fluctuating between 21.3°C (70.3°F) and 31.7°C (89.1°F).

Temperature

The onset of December marks an average high-temperature of a still tropical 31.7°C (89.1°F), hardly differing from November's 30.9°C (87.6°F). Throughout December nights, Esplanada registers an average low-temperature of 21.3°C (70.3°F).

Heat index

In December, the average heat index is calculated to be a blistering 41°C (105.8°F). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', melds the effects of warmth and moisture to generate a feeling of heat. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for 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 innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

January, February and December, with an average relative humidity of 75%, are the least humid months.

Rainfall

In Esplanada, during December, the rain falls for 15.8 days and regularly aggregates up to 41mm (1.61") of precipitation. In Esplanada, Brazil, during the entire year, the rain falls for 227.5 days and collects up to 570mm (22.44") of precipitation.

Daylight

With an average of 12h and 48min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 04:57 and sunset at 17:44. On the last day of December, in Esplanada, sunrise is at 05:10 and sunset at 17:59 -03.

Sunshine

In December, the average sunshine is 7.4h.

UV index

In Esplanada, Brazil, the average daily maximum UV index in December is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum high UV index of 6 in December translates into the following recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.