December weather forecast
São Sebastião do Passé, Brazil

The first month of the summer, December, is also a hot month in São Sebastião do Passé, Brazil, with an average temperature fluctuating between 32°C (89.6°F) and 21.1°C (70°F).

Temperature

São Sebastião do Passé signifies an average high-temperature of a still tropical 32°C (89.6°F) in December, closely mirroring the 31.2°C (88.2°F) of November. December brings São Sebastião do Passé a consistent average low-temperature of 21.1°C (70°F).

Heat index

In December, the heat index is computed to be a scorching 43°C (109.4°F). Observe: Heat exhaustion and heat cramps are probable. Heatstroke is on the horizon with prolonged exertion.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', evaluates the perceived heat by adding the effect of moisture in the air. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

January, February and December, with an average relative humidity of 76%, are the least humid months.

Rainfall

In São Sebastião do Passé, in December, during 13.7 rainfall days, 45mm (1.77") of precipitation is typically accumulated. In São Sebastião do Passé, during the entire year, the rain falls for 222.4 days and collects up to 664mm (26.14") of precipitation.

Daylight

The month with the longest days is December, with an average of 12h and 48min of daylight.
On the first day of December, sunrise is at 04:58 and sunset at 17:47. On the last day of the month, sunrise is at 05:11 and sunset at 18:02 -03.

Sunshine

In December, the average sunshine in São Sebastião do Passé is 7.3h.

UV index

January through March, November and December, with an average maximum UV index of 7, are months with the highest UV index in São Sebastião do Passé, Brazil. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In December, the maximum UV index of 7 transforms into these recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. To cut down UV radiation exposure by about half, sport a wide-brim hat.