December weather forecast
Lajedão, Brazil

The first month of the summer, December, is still a warm month in Lajedão, Brazil, with an average temperature varying between 29.6°C (85.3°F) and 20.5°C (68.9°F).

Temperature

The arrival of December sees an average high-temperature of a still warm 29.6°C (85.3°F), hardly diverging from November's 28.8°C (83.8°F). An average low-temperature of 20.5°C (68.9°F) marks the month of December in Lajedão.

Heat index

The heat index for December is appraised at a very hot 37°C (98.6°F). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'real feel', gauges the sensation of temperature factoring in the air's moisture content. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing 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 high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

The average relative humidity in December is 83%.

Rainfall

The month with the most rainfall is December, when the rain falls for 23.9 days and typically aggregates up to 148mm (5.83") of precipitation.

Daylight

The month with the longest days is December, with an average of 13h and 12min of daylight.
On the first day of the month, sunrise is at 04:57 and sunset at 18:03. On the last day of December, sunrise is at 05:09 and sunset at 18:19 -03.

Sunshine

The average sunshine in December in Lajedão is 7.4h.

UV index

The months with the highest UV index are January through June, August through December, with an average maximum UV index of 6. A UV Index estimate 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 daily UV index of 6 turns into the following recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.