December weather forecast
Porto Xavier, Brazil

The first month of the summer, December, is a tropical month in Porto Xavier, Brazil, with an average temperature ranging between max 30.3°C (86.5°F) and min 19°C (66.2°F).

Temperature

Porto Xavier commences December with an average high-temperature of a hot 30.3°C (86.5°F), maintaining a close resemblance to the previous month. Throughout the month of December, Porto Xavier sees a steady low-temperature average of 19°C (66.2°F).

Heat index

During December, the heat index is computed to be a sweltering 37°C (98.6°F). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

With an average relative humidity of 76%, December is the least humid month.

Rainfall

In Porto Xavier, Brazil, in December, it is raining for 17.5 days, with typically 117mm (4.61") of accumulated precipitation. Throughout the year, there are 166.5 rainfall days, and 1177mm (46.34") of precipitation is accumulated.

Daylight

With an average of 13h and 54min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:36 and sunset at 19:23. On the last day of December, sunrise is at 05:47 and sunset at 19:40 -03.

Sunshine

In December, the average sunshine is 9.9h.

UV index

January through March, October through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 6 translates into these guidelines:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.