December weather forecast
San Antonio, Paraguay

December brings a bout of summery warmth to San Antonio, featuring some of the highest temperatures of the year. The weather in the city is characterized by high temperatures, high humidity, and lengthy daylight hours. A temperature high of 33°C (91.4°F) and a significant rainfall of 104mm (4.09") signifies the festive and holiday season in full swing. Despite the warm temperatures, the wind speeds and humidity remain pleasantly steady throughout the month. Christmas is a warm affair, making it a unique experience for those used to celebrating in the cold.

Temperature

As San Antonio transitions into December, the average high-temperature stands at a still hot 33°C (91.4°F), offering little variation from the preceding month. In the month of December, the average temperature dips to an agreeable 22.3°C (72.1°F) during the night.

Heat index

December's heat index is estimated at an extremely hot 43°C (109.4°F). Careful: Heat exhaustion and heat cramps are anticipated. With ongoing exertion, heatstroke becomes a possibility.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

The average relative humidity in December is 69%.

Rainfall

In San Antonio, during December, the rain falls for 15.5 days and regularly aggregates up to 104mm (4.09") of precipitation. Throughout the year, there are 153.2 rainfall days, and 865mm (34.06") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 13h and 42min of daylight.
On the first day of the month, sunrise is at 05:51 and sunset at 19:27. On the last day of December, sunrise is at 06:02 and sunset at 19:44 -03.

Sunshine

The average sunshine in December is 10.4h.

UV index

January, February, October and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: In December, the maximum UV index of 7 transforms into these recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.