December weather forecast
São José de Piranhas, Brazil

December, the first month of the summer in São José de Piranhas, is also a hot month, with an average temperature fluctuating between 22.8°C (73°F) and 33.2°C (91.8°F).

Temperature

December's commencement is accompanied by an average high-temperature of a still tropical 33.2°C (91.8°F), diverging marginally from November's 34.3°C (93.7°F). São José de Piranhas encounters a steady low-temperature average of 22.8°C (73°F) throughout the month of December.

Heat index

In December, the average heat index is evaluated at a sweltering 38°C (100.4°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Heat index details are generally centered around shaded locations and a mild breeze. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

In December, the average relative humidity is 54%.

Rainfall

In São José de Piranhas, during December, the rain falls for 12.3 days and regularly aggregates up to 55mm (2.17") of precipitation. In São José de Piranhas, Brazil, during the entire year, the rain falls for 159.2 days and collects up to 757mm (29.8") of precipitation.

Daylight

December has the longest days of the year, with an average of 12h and 30min of daylight.
On the first day of the month, sunrise is at 05:07 and sunset at 17:38. On the last day of December, in São José de Piranhas, sunrise is at 05:21 and sunset at 17:53 -03.

Sunshine

The average sunshine in December in São José de Piranhas, Brazil, is 8.7h.

UV index

March, August through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: A maximum high UV index of 7 in December translates into the following recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.