December weather forecast
Sete Barras, Brazil

The first month of the summer, December, is a hot month in Sete Barras, Brazil, with an average temperature ranging between max 30.5°C (86.9°F) and min 19.9°C (67.8°F).

Temperature

The arrival of December marks a slight shift to an average high-temperature of a tropical 30.5°C (86.9°F) from November's 27.8°C (82°F). Throughout December, the temperature in Sete Barras falls to an average low of 19.9°C (67.8°F).

Heat index

The heat index value for December is computed to be an extremely hot 40°C (104°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. 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', reflects the blend of air temperature and relative humidity to give a temperature impression. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

December is the least humid month, with an average relative humidity of 82%.

Rainfall

In Sete Barras, in December, during 21.9 rainfall days, 105mm (4.13") of precipitation is typically accumulated. Throughout the year, there are 210 rainfall days, and 893mm (35.16") of precipitation is accumulated.

Daylight

With an average of 13h and 36min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:14 and sunset at 18:47. On the last day of December, sunrise is at 05:26 and sunset at 19:03 -03.

Sunshine

In December, the average sunshine is 6.6h.

UV index

January through March, October through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily high UV index of 6 during December translates into the following recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.