December weather forecastJaci, Brazil

Weather in December

The first month of the summer, December, is also a moderately hot month in Jaci, Brazil, with an average temperature varying between 21.2°C (70.2°F) and 29.8°C (85.6°F).

Temperature

December observes an average high-temperature of a warm 29.8°C (85.6°F), marking an insignificant difference from November's 30°C (86°F). Throughout the month of December, Jaci expects an average low of 21.2°C (70.2°F).

Heat index

For most parts of December, the heat index is evaluated at a very hot 37°C (98.6°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Realize that the values for the heat index are set for shaded places and light winds. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', determines the feeling of heat when you account for the relative humidity. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

The average relative humidity in December is 81%.

Rainfall

In December, the rain falls for 28.5 days. Throughout December, 201mm (7.91") of precipitation is accumulated. In Jaci, during the entire year, the rain falls for 208.9 days and collects up to 1257mm (49.49") of precipitation.

Daylight

With an average of 13h and 24min of daylight, December has the longest days of the year in Jaci.
On the first day of December, sunrise is at 05:28 and sunset at 18:46. On the last day of the month, sunrise is at 05:40 and sunset at 19:02 -03.

Sunshine

In December, the average sunshine in Jaci is 7.6h.

UV index

The months with the highest UV index in Jaci are January, March 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 rays for average individuals.
Note: In December, the average maximum UV index of 6 translates into the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.