December weather forecast
Terenos, Brazil

The first month of the summer, December, is still a warm month in Terenos, Brazil, with an average temperature varying between 29.7°C (85.5°F) and 21.5°C (70.7°F).

Temperature

An average high-temperature of a warm 29.7°C (85.5°F) marks December, exhibiting a close resemblance to the conditions in November. In December, the temperature in Terenos drops to an average of 21.5°C (70.7°F) at night.

Heat index

December's average heat index is estimated at a very hot 36°C (96.8°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Keep in mind the heat index values are meant for areas in shade and with light wind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', takes into account both air temperature and humidity to illustrate what people actually feel. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

In Terenos, the average relative humidity in December is 78%.

Rainfall

The month with the most rainfall is December, when the rain falls for 24.5 days and typically aggregates up to 138mm (5.43") of precipitation.

Daylight

The month with the longest days in Terenos, Brazil, is December, with an average of 13h and 18min of daylight.
On the first day of the month, sunrise is at 04:50 and sunset at 18:07. On the last day of December, sunrise is at 05:02 and sunset at 18:23 -04.

Sunshine

The average sunshine in December in Terenos is 9.5h.

UV index

In December, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: A daily high UV index of 6 in December leads to these guidelines:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.