December weather forecast
Salvador, Brazil

Wrapping up the year in Salvador, December experiences a slight upward trend in weather temperatures. The city's weather is distinguished by an increase in rainfall, contributing to its tropical rainfall regime. Despite the showers, Salvador continues to bask in substantial sunlight. The increase in humidity partnered with warmer weather encapsulates the true essence of Salvador's climate as the year concludes.

Temperature

The commencement of December brings an average high-temperature of a still moderately hot 29°C (84.2°F), marking an inconsequential divergence from November. In Salvador, an average temperature of 23.2°C (73.8°F) is noted during December nights.

Heat index

The heat index for December is calculated to be a fiery hot 35°C (95°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

The average relative humidity in December is 81.1%.

Rainfall

In Salvador, during December, the rain falls for 10 days and regularly aggregates up to 143mm (5.63") of precipitation. Throughout the year, there are 173 rainfall days, and 2144mm (84.41") of precipitation is accumulated.

Sea temperature

In Salvador, the average seawater temperature in December is 27.2°C (81°F).
Note: For any water activity, the surface water temperatures in the range of 25°C (77°F) to 29°C (84.2°F) are deemed excellent and incredibly pleasant for longer durations.

Daylight

The month with the longest days in Salvador is December, with an average of 12h and 54min of daylight.
On the first day of the month, sunrise is at 04:58 and sunset at 17:48. On the last day of December, sunrise is at 05:10 and sunset at 18:03 -03.

Sunshine

In Salvador, the average sunshine in December is 7.2h.

UV index

January through March, September through December, with an average maximum UV index of 12, are months with the highest UV index. A UV Index value of 11, and more, symbolizes an excessive health risk from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index of 12 in December interprets into the following recommendations:
Utilize all necessary safety measures, unprotected skin could suffer burns instantly. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Directly after outdoor activities or swimming, a broad-spectrum sunscreen with SPF 30+ should be applied generously and reapplied frequently. Watch out! Reflections from sand and water can surge UV radiation exposure.