December weather forecast
Parnaguá, Brazil

The first month of the summer, December, is still a tropical month in Parnaguá, Brazil, with an average temperature varying between 31.3°C (88.3°F) and 20.3°C (68.5°F).

Temperature

Parnaguá indicates an average high-temperature of a still hot 31.3°C (88.3°F) in December, showing minor variation from November's 32.1°C (89.8°F). Nighttime temperature dips to a mean of 20.3°C (68.5°F) during December.

Heat index

The heat index value during December is calculated to be a fiery hot 39°C (102.2°F). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
Data suggests that the heat index is set for environments in shade and with a light wind. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an estimation of the warmth sensation when considering humidity levels. 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. 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 hold great significance to children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. 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. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Parnaguá, the average relative humidity in December is 73%.

Rainfall

In Parnaguá, in December, it is raining for 16.5 days, with typically 65mm (2.56") of accumulated precipitation. In Parnaguá, during the entire year, the rain falls for 134.3 days and collects up to 578mm (22.76") of precipitation.

Daylight

With an average of 12h and 42min 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 18:08. On the last day of December, sunrise is at 05:40 and sunset at 18:23 -03.

Sunshine

The month with the most sunshine is December, with an average of 9.9h of sunshine.

UV index

January through July, November and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The daily high UV index of 6 during December translates into the following recommendations:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. 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. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.