December weather forecast
São José da Safira, Brazil

The first month of the summer, December, is also a moderately hot month in São José da Safira, Brazil, with an average temperature fluctuating between 28.8°C (83.8°F) and 20.5°C (68.9°F).

Temperature

With the onset of December, the average high-temperature of a still warm 28.8°C (83.8°F) mirrors that of November. The average temperature drops to a pleasant 20.5°C (68.9°F) during the night in the month of December.

Heat index

December's heat index is computed to be a torrid 35°C (95°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
Heat index determinations are made taking into account the shade and light air movements. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

With an average relative humidity of 85%, December is the most humid month in São José da Safira, Brazil.

Rainfall

December is the month with the most rainfall. Rain falls for 23.4 days and accumulates 185mm (7.28") of precipitation.

Daylight

The month with the longest days in São José da Safira, Brazil, is December, with an average of 13h and 12min of daylight.
On the first day of the month, sunrise is at 05:03 and sunset at 18:12. On the last day of December, sunrise is at 05:15 and sunset at 18:28 -03.

Sunshine

In São José da Safira, the average sunshine in December is 7.1h.

UV index

The months with the highest UV index in São José da Safira are January through May, August through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: A typical high UV index of 6 in December suggests the following recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.