December weather forecast
São Félix do Xingu, Brazil

The first month of the summer, December, is also a hot month in São Félix do Xingu, Brazil, with an average temperature ranging between max 30.5°C (86.9°F) and min 21°C (69.8°F).

Temperature

With December's arrival, São Félix do Xingu notes an average high-temperature of a still tropical 30.5°C (86.9°F), closely following the trend of the preceding month. São Félix do Xingu experiences an average low-temperature of 21°C (69.8°F) in the month of December.

Heat index

December's average heat index is appraised at a blistering 41°C (105.8°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'real feel', binds temperature metrics with humidity values to give a sense of the actual warmth. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly 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.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

In December, the average relative humidity is 85%.

Rainfall

In São Félix do Xingu, during December, the rain falls for 27.5 days and regularly aggregates up to 172mm (6.77") of precipitation. Throughout the year, there are 227.8 rainfall days, and 1282mm (50.47") of precipitation is accumulated.

Daylight

With an average of 12h and 30min of daylight, December has the longest days of the year in São Félix do Xingu.
On the first day of the month, sunrise is at 06:02 and sunset at 18:31. On the last day of December, in São Félix do Xingu, sunrise is at 06:16 and sunset at 18:46 -03.

Sunshine

The average sunshine in December is 6.9h.

UV index

The months with the lowest UV index are January through May, October through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, a regular UV index of 6 translates into these guidelines:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.