December weather forecast
Santurce, Argentina

December, the first month of the summer in Santurce, is still a tropical month, with temperature in the range of an average high of 33.1°C (91.6°F) and an average low of 20°C (68°F).

Temperature

As December takes hold, the average high-temperature is a still hot 33.1°C (91.6°F), nearly mirroring that of the previous month. Despite considerable daily temperature swings, a steady low-temperature average of 20°C (68°F) is noted in Santurce throughout December.

Heat index

December's mean heat index is evaluated at a very hot 37°C (98.6°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is achieved by amalgamating air temperature with the relative humidity readings. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

The average relative humidity in December in Santurce is 53%.

Rainfall

In Santurce, during December, the rain falls for 10.8 days and regularly aggregates up to 60mm (2.36") of precipitation. In Santurce, during the entire year, the rain falls for 102.1 days and collects up to 528mm (20.79") of precipitation.

Daylight

The month with the longest days is December, with an average of 14h and 6min of daylight.
On the first day of December, sunrise is at 05:55 and sunset at 19:52. On the last day of the month, sunrise is at 06:06 and sunset at 20:09 -03.

Sunshine

With an average of 9.4h of sunshine, December has the most sunshine of the year in Santurce.

UV index

The months with the highest UV index are January, February and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: A maximum high daily UV index of 7 during December translates into the following directions:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.