December weather forecastMacapá, Brazil

Weather in December

Finally, as the year ends in Macapá, December presents conditions akin to November. However, rainfall rises noticeably from the previous month, marking the onset of the wetter month. Wind speeds are slightly reduced, while sea temperatures remain comfortably inviting. Despite increased cloud coverage and rainfall, the holiday month still offers adequate sunlight, ensuring a relaxing vacation.

Temperature

The start of December sees the average high-temperature at a still hot 31.1°C (88°F), showing little difference from November's 32.5°C (90.5°F). In the month of December, Macapá experiences an average low-temperature of 25°C (77°F).

Heat index

During December, the heat index is evaluated at an extremely hot 40°C (104°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
Always consider that heat index estimations are for light winds and places in the shade. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', evaluates the perceived heat by adding the effect of moisture in the air. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

The average relative humidity in December is 76%.

Rainfall

In Macapá, in December, during 24.3 rainfall days, 225mm (8.86") of precipitation is typically accumulated. Throughout the year, there are 280.7 rainfall days, and 2496mm (98.27") of precipitation is accumulated.

Sea temperature

In December, the average sea temperature in Macapá is 27.9°C (82.2°F).
Note: Swimming, diving, and other water activities in the temperature range of 25°C (77°F) to 29°C (84.2°F) are perceived as very enjoyable and comfortable for prolonged durations.

Daylight

The average length of the day in December is 12h and 7min.
On the first day of the month, sunrise is at 06:09 and sunset at 18:17. On the last day of December, sunrise is at 06:23 and sunset at 18:31 -03.

Sunshine

In December, the average sunshine in Macapá, Brazil, is 7.4h.

UV index

January through April and December, with an average maximum UV index of 6, are months with the lowest UV index in Macapá. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The UV index of 6 during December leads to these advisories:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Attention! The combination of sand and water reflections enhances UV ray intensity.