December weather forecast
Águas de São Pedro, Brazil

The first month of the summer, December, is also a moderately hot month in Águas de São Pedro, Brazil, with an average temperature fluctuating between 29°C (84.2°F) and 19.6°C (67.3°F).

Temperature

Águas de São Pedro's weather in December, with an average high-temperature of a still moderately hot 29°C (84.2°F), subtly shifts from November's 28.5°C (83.3°F). In the month of December, Águas de São Pedro records a consistent average low-temperature of 19.6°C (67.3°F).

Heat index

For December, the heat index is calculated to be a sweltering 35°C (95°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are extremely significant for children. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In Águas de São Pedro, the average relative humidity in December is 79%.

Rainfall

In Águas de São Pedro, in December, it is raining for 26.5 days, with typically 177mm (6.97") of accumulated precipitation. Throughout the year, there are 208.3 rainfall days, and 1276mm (50.24") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 13h and 30min of daylight.
On the first day of the month, sunrise is at 05:18 and sunset at 18:43. On the last day of December, in Águas de São Pedro, Brazil, sunrise is at 05:29 and sunset at 18:59 -03.

Sunshine

In December, the average sunshine is 7.9h.

UV index

The months with the lowest UV index are February through July, September and December, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 5 in December transforms into the following instructions:
Exercise prevention - Protecting skin and eyes from harm is required. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.