December weather forecastSertânia, Brazil

Weather in December

December, the first month of the summer in Sertânia, is still a tropical month, with an average temperature ranging between min 19.7°C (67.5°F) and max 31.3°C (88.3°F).

Temperature

Sertânia records a slight change with December's average high-temperatures adjusting to a still tropical 31.3°C (88.3°F) from November's 31.6°C (88.9°F). Sertânia experiences a mean temperature of 19.7°C (67.5°F) during December nights.

Heat index

December's average heat index is computed to be a torrid 36°C (96.8°F). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

November and December, with an average relative humidity of 62%, are the least humid months.

Rainfall

In December, in Sertânia, the rain falls for 10.9 days. Throughout December, 26mm (1.02") of precipitation is accumulated. Throughout the year, in Sertânia, there are 140.9 rainfall days, and 430mm (16.93") of precipitation is accumulated.

Daylight

The month with the longest days in Sertânia is December, with an average of 12h and 36min of daylight.
On the first day of the month, sunrise is at 05:01 and sunset at 17:35. On the last day of December, sunrise is at 05:14 and sunset at 17:49 -03.

Sunshine

The average sunshine in December in Sertânia is 9.2h.

UV index

In Sertânia, the average daily maximum UV index in December is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.
Note: In December, the maximum UV index of 6 translates into these guidelines:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.