December weather forecast
Guaiçara, Brazil

The first month of the summer, December, is also a moderately hot month in Guaiçara, Brazil, with an average temperature ranging between max 29.8°C (85.6°F) and min 21.1°C (70°F).

Temperature

A minimal variation is noted in Guaiçara's average high-temperature at the onset of December, reaching a still moderately hot 29.8°C (85.6°F) from November's 29.9°C (85.8°F). During the month of December, Guaiçara anticipates a mean low-temperature of 21.1°C (70°F).

Heat index

The average heat index in December is computed to be a very hot 37°C (98.6°F). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

In Guaiçara, the average relative humidity in December is 79%.

Rainfall

In Guaiçara, Brazil, in December, during 26.4 rainfall days, 175mm (6.89") of precipitation is typically accumulated. Throughout the year, there are 195.6 rainfall days, and 1139mm (44.84") 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 18:49. On the last day of December, sunrise is at 05:39 and sunset at 19:05 -03.

Sunshine

In December, the average sunshine is 7.7h.

UV index

January through April, July through December, with an average maximum UV index of 6, are months with the highest UV index in Guaiçara. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 6 in December converts into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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.