December weather forecast
Ibirapuã, Brazil

December, the first month of the summer in Ibirapuã, is still a warm month, with an average temperature ranging between min 20.5°C (68.9°F) and max 29.6°C (85.3°F).

Temperature

The average high-temperature is a still warm 29.6°C (85.3°F) in December, hardly different from the 28.8°C (83.8°F) recorded in November. An average low-temperature of 20.5°C (68.9°F) is anticipated throughout the nights during December.

Heat index

In December, the heat index is computed to be a sweltering 37°C (98.6°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. 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.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In December, the average relative humidity is 83%.

Rainfall

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

Daylight

December has the longest days of the year, with an average of 13h and 12min of daylight.
On the first day of December, sunrise is at 04:56 and sunset at 18:03. On the last day of the month, sunrise is at 05:08 and sunset at 18:18 -03.

Sunshine

In December, the average sunshine in Ibirapuã 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 health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 6 in December translates into the following recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.