December weather forecast
Rio do Antônio, Brazil

The first month of the summer, December, is also a moderately hot month in Rio do Antônio, Brazil, with temperature in the range of an average low of 19.5°C (67.1°F) and an average high of 29.5°C (85.1°F).

Temperature

Rio do Antônio experiences a minor change to a still warm 29.5°C (85.1°F) in average high-temperature during December, closely reflecting November. The average nighttime temperature lowers to a comfortable 19.5°C (67.1°F) throughout December.

Heat index

December's heat index is calculated to be a torrid 35°C (95°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Note that heat index values are valued for light wind and location in the shade. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a value derived by merging air temperature with the humidity to convey how the climate feels. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

In Rio do Antônio, the average relative humidity in December is 76%.

Rainfall

December is the month with the most rainfall. Rain falls for 17.7 days and accumulates 102mm (4.02") of precipitation.

Daylight

December has the longest days of the year, with an average of 13h and 0min of daylight.
On the first day of the month, sunrise is at 05:09 and sunset at 18:05. On the last day of December, in Rio do Antônio, sunrise is at 05:22 and sunset at 18:20 -03.

Sunshine

The average sunshine in December in Rio do Antônio is 9.3h.

UV index

The average daily maximum UV index in December is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 6 during December translates into these guidelines:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. 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. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.