December weather forecast
São Francisco do Conde, Brazil

December, the first month of the summer in São Francisco do Conde, is still a hot month, with an average temperature fluctuating between 21.5°C (70.7°F) and 31.7°C (89.1°F).

Temperature

São Francisco do Conde ushers in December with an average high-temperature of a still hot 31.7°C (89.1°F), showing a close resemblance to the previous month. São Francisco do Conde, during December nights, observes an average temperature of 21.5°C (70.7°F).

Heat index

For most parts of December, the heat index is computed to be a blistering 41°C (105.8°F). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'feels like', provides an understanding of perceived warmth by combining temperature and relative humidity. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to 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.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

In São Francisco do Conde, the average relative humidity in December is 75%.

Rainfall

In São Francisco do Conde, during December, the rain falls for 15 days and regularly aggregates up to 46mm (1.81") of precipitation. Throughout the year, there are 242.4 rainfall days, and 646mm (25.43") of precipitation is accumulated.

Sea temperature

In São Francisco do Conde, in December, the average water temperature is 27.2°C (81°F).
Note: Water surface temperatures from 25°C (77°F) to 29°C (84.2°F) are considered optimal and extremely delightful for long-lasting pleasure in any water activity.

Daylight

The month with the longest days in São Francisco do Conde is December, with an average of 12h and 54min of daylight.
On the first day of the month, sunrise is at 04:59 and sunset at 17:48. On the last day of December, sunrise is at 05:12 and sunset at 18:03 -03.

Sunshine

In São Francisco do Conde, the average sunshine in December is 7.7h.

UV index

The months with the highest UV index in São Francisco do Conde are January through March, November and December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In December, a regular UV index of 7 translates into these guidelines:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Warning! The Sun's UV rays intensify with reflections from sand and water.