December weather forecast
Marília, Brazil

December, the first month of the summer in Marília, is also a moderately hot month, with an average temperature ranging between min 19.9°C (67.8°F) and max 29°C (84.2°F).

Temperature

December brings an average high-temperature of a still moderately hot 29°C (84.2°F), nearly identical to the preceding month. The average temperature during December nights dips to an enjoyable 19.9°C (67.8°F).

Heat index

For most parts of December, the heat index is computed to be a very hot 35°C (95°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In December, the average relative humidity is 81%.

Rainfall

In Marília, during December, the rain falls for 26.5 days and regularly aggregates up to 165mm (6.5") of precipitation. Throughout the year, in Marília, there are 194.1 rainfall days, and 1105mm (43.5") of precipitation is accumulated.

Daylight

December has the longest days of the year, with an average of 13h and 30min of daylight.
On the first day of December in Marília, sunrise is at 05:27 and sunset at 18:50. On the last day of the month, sunrise is at 05:39 and sunset at 19:07 -03.

Sunshine

In December, the average sunshine is 7.6h.

UV index

The months with the lowest UV index in Marília, Brazil, are April through July and December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The daily high UV index of 5 during December translates into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.