December weather forecast
Birigui, Brazil

The first month of the summer, December, is still a hot month in Birigui, Brazil, with an average temperature fluctuating between 30.1°C (86.2°F) and 21.4°C (70.5°F).

Temperature

In December, Birigui experiences a minor shift in meteorological conditions with average high-temperatures marked at a still tropical 30.1°C (86.2°F), closely mirroring the climate in November. During December, the temperature tends to dip to an average of 21.4°C (70.5°F) at night.

Heat index

The heat index for December is evaluated at a torrid 38°C (100.4°F). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Data suggests that the heat index is set for environments in shade and with a light wind. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In Birigui, the average relative humidity in December is 79%.

Rainfall

In Birigui, in December, it is raining for 25.2 days, with typically 176mm (6.93") of accumulated precipitation. In Birigui, during the entire year, the rain falls for 194.5 days and collects up to 1131mm (44.53") of precipitation.

Daylight

The month with the longest days is December, with an average of 13h and 24min of daylight.
On the first day of December in Birigui, sunrise is at 05:30 and sunset at 18:50. On the last day of the month, sunrise is at 05:42 and sunset at 19:06 -03.

Sunshine

In December, the average sunshine in Birigui is 7.7h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 6. January through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 6 transforms into these recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.