December weather forecast
Fortaleza, Brazil

Bringing the year to an end, December in Fortaleza follows the trend with its climatic uniformity. A slight increase in rainfall to 44mm (1.73") marks the weather changes, while temperatures stabilize around the high 29°C (84.2°F) to low 24°C (75.2°F) mark. The sea temperature rises further to 27.8°C (82°F), providing comfortable conditions for beach activities. Sunlight estimation continues as before, bathing Fortaleza in abundant warmth. Step into year-end festivities in Fortaleza, greeted by warmth, comfort, and cultural proficiency.

Temperature

November and December are the warmest months in Fortaleza, with an average high-temperature of 30.7°C (87.3°F).

Heat index

In December, the average heat index is estimated at a torrid 39°C (102.2°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is the outcome of merging air's temperature and its humidity metrics. 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. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

In December, the average relative humidity in Fortaleza is 75.9%.

Rainfall

In Fortaleza, during December, the rain falls for 6 days and regularly aggregates up to 44mm (1.73") of precipitation. Throughout the year, in Fortaleza, there are 135 rainfall days, and 1608mm (63.31") of precipitation is accumulated.

Sea temperature

In Fortaleza, the average seawater temperature in December is 27.8°C (82°F).
Note: For engaging in water activities including swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are perceived as perfect, providing pleasure for extended durations.

Daylight

With an average of 12h and 18min of daylight, December has the longest days of the year in Fortaleza.
On the first day of December in Fortaleza, sunrise is at 05:13 and sunset at 17:33. On the last day of the month, sunrise is at 05:27 and sunset at 17:47 -03.

Sunshine

The average sunshine in December is 8.5h.

UV index

January through April, September through December, with an average maximum UV index of 12, are months with the highest UV index in Fortaleza. A UV Index of 11, and more, symbolizes an extreme health hazard from exposure to the Sun's UV radiation for average individuals.
Note: During December, 12 as the daily maximum UV index converts into the following advice:
Ensure all key precautions. Defense against sun exposure is critical. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Heads up! UV intensity is amplified by reflections from water and sand.