December weather forecast
Pedreiras, Brazil

December, the first month of the summer in Pedreiras, is also a hot month, with temperature in the range of an average high of 32.6°C (90.7°F) and an average low of 22.8°C (73°F).

Temperature

Pedreiras's average high-temperature in December sits at a still hot 32.6°C (90.7°F), showing little difference from the previous month. In the month of December, the nighttime temperature dips to a steady average of 22.8°C (73°F).

Heat index

The heat index value for December is appraised at a blazing hot 45°C (113°F). Be prepared: Heat cramps and heat exhaustion are probable. Continued activity may lead to heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'feels like', reflects the blend of air temperature and relative humidity to give a temperature impression. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are largely significant for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

In Pedreiras, the average relative humidity in December is 77%.

Rainfall

In Pedreiras, during December, the rain falls for 21.1 days and regularly aggregates up to 111mm (4.37") of precipitation. Throughout the year, there are 222.6 rainfall days, and 1037mm (40.83") of precipitation is accumulated.

Daylight

The month with the longest days in Pedreiras is December, with an average of 12h and 24min of daylight.
On the first day of December, sunrise is at 05:36 and sunset at 17:58. On the last day of the month, sunrise is at 05:50 and sunset at 18:13 -03.

Sunshine

The average sunshine in December in Pedreiras is 8h.

UV index

The months with the lowest UV index are January through June and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index of 6 in December interprets into the following recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.