December weather forecast
Natal, Brazil

December in Natal, Brazil ushers in higher temperatures, making it feel warmer. The city experiences a rise in rainfall with average totals of 27mm (1.06") for the month. Wind speeds drop slightly while sea temperatures continue a noticeable upward trajectory. The humidity levels stabilize to about 74%, making the weather suitable for outdoor activities. Despite the shift towards warmer, more humid weather, December retains an average level of sun-filled days, complementing the festive season atmosphere.

Temperature

Shifting into December, Natal records an average high-temperature of a still warm 29.3°C (84.7°F), presenting minor fluctuations compared to the previous month. In Natal, the nocturnal temperatures throughout December show a marginal dip from the daytime averages, settling at a still warm 25.8°C (78.4°F).

Heat index

The average heat index in December is calculated to be a tropical 34°C (93.2°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Remember that heat index calculations are made for conditions in the shade with light wind. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. 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. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.

Humidity

In Natal, the average relative humidity in December is 74%.

Rainfall

In Natal, during December, the rain falls for 17 days and regularly aggregates up to 27mm (1.06") of precipitation. Throughout the year, there are 195.4 rainfall days, and 692mm (27.24") of precipitation is accumulated.

Sea temperature

In Natal, the average seawater temperature in December is 27.6°C (81.7°F).
Note: Water temperatures ranging between 25°C (77°F) and 29°C (84.2°F) are regarded as very warm, making swimming, diving, and similar water activities pleasurable for extended periods.

Daylight

The month with the longest days in Natal is December, with an average of 12h and 30min of daylight.
On the first day of December, sunrise is at 04:56 and sunset at 17:23. On the last day of the month, sunrise is at 05:10 and sunset at 17:37 -03.

Sunshine

In December, the average sunshine is 8.2h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.
Note: A maximum UV index of 7 in December translates into the following recommendations:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Always opt for UVA and UVB-resistant sunglasses on radiant days. Attention! The reflection of both water and sand can increase the intensity of UV rays.