December weather forecast
Silvanópolis, Brazil

The first month of the summer, December, is still a tropical month in Silvanópolis, Brazil, with an average temperature fluctuating between 22.2°C (72°F) and 31.3°C (88.3°F).

Temperature

With the start of December, Silvanópolis measures an average high-temperature of a still tropical 31.3°C (88.3°F), not significantly differing from November's 32.6°C (90.7°F). In December, Silvanópolis records an average nighttime temperature of 22.2°C (72°F).

Heat index

December's mean heat index is computed to be a blistering 41°C (105.8°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is found by incorporating humidity levels into the air temperature measurement. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

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

Rainfall

In Silvanópolis, in December, during 25.8 rainfall days, 129mm (5.08") of precipitation is typically accumulated. In Silvanópolis, during the entire year, the rain falls for 198 days and collects up to 907mm (35.71") of precipitation.

Daylight

December has the longest days of the year, with an average of 12h and 48min of daylight.
On the first day of the month, sunrise is at 05:39 and sunset at 18:23. On the last day of December, sunrise is at 05:52 and sunset at 18:38 -03.

Sunshine

In Silvanópolis, the average sunshine in December is 9.3h.

UV index

February through May and December, with an average maximum UV index of 6, are months with the lowest UV index in Silvanópolis. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 6 during December translates into the following guidance:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.