December weather forecast
Mendonça, Brazil

December, the first month of the summer in Mendonça, is still a warm month, with temperature in the range of an average low of 21.2°C (70.2°F) and an average high of 29.8°C (85.6°F).

Temperature

The advent of December brings an average high-temperature of a warm 29.8°C (85.6°F), exhibiting minor difference from the previous month. In Mendonça, the December nights cool down to an average low of 21.2°C (70.2°F).

Heat index

December's mean heat index is evaluated at a fiery hot 37°C (98.6°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', blends air temperature and moisture content to represent the felt temperature to humans. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

In Mendonça, Brazil, the average relative humidity in December is 81%.

Rainfall

In Mendonça, in December, it is raining for 28.5 days, with typically 201mm (7.91") of accumulated precipitation. Throughout the year, in Mendonça, Brazil, there are 208.9 rainfall days, and 1257mm (49.49") of precipitation is accumulated.

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 05:27 and sunset at 18:47. On the last day of December, sunrise is at 05:39 and sunset at 19:03 -03.

Sunshine

The average sunshine in December in Mendonça is 7.6h.

UV index

January, March through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.
Note: The UV index of 6 in December translates into these instructions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.