December weather forecastUarini, Brazil

Weather in December

December, the first month of the summer in Uarini, is also a hot month, with an average temperature fluctuating between 30.7°C (87.3°F) and 23.1°C (73.6°F).

Temperature

The onset of December marks an average high-temperature of a still tropical 30.7°C (87.3°F), hardly differing from November's 32.7°C (90.9°F). An average temperature of 23.1°C (73.6°F) marks the nights in December.

Heat index

In December, the average heat index is calculated to be a blistering 42°C (107.6°F). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', measures the perceived warmth when incorporating the humidity present 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. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

In Uarini, the average relative humidity in December is 87%.

Rainfall

The month with the most rainfall is December, when the rain falls for 28.4 days and typically aggregates up to 214mm (8.43") of precipitation.

Daylight

The month with the longest days is December, with an average of 12h and 18min of daylight.
On the first day of December, sunrise is at 06:01 and sunset at 18:18. On the last day of the month, sunrise is at 06:15 and sunset at 18:32 -04.

Sunshine

The average sunshine in December is 6.2h.

UV index

The months with the highest UV index are July through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: The daily maximum UV index of 7 in December interprets into the following advice:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.