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 in San Antonio is a warm affair, making it a unique experience for those used to celebrating in the cold.

Temperature

December begins with an average high-temperature of a still hot 33°C (91.4°F), reflecting close similarity to the preceding month. San Antonio reports an average nighttime low-temperature of 22.3°C (72.1°F) in December.

Heat index

For most parts of December, the heat index is evaluated at a blisteringly hot 43°C (109.4°F). Eyes open: Heat cramps and heat exhaustion are expected. Prolonged exertion could lead to heatstroke.
In reference to the heat index, it's for places in shade and with a slight wind. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', represents the fusion of temperature and moisture in the air to suggest how warm it feels. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

The average relative humidity in December is 69%.

Rainfall

In San Antonio, in December, during 15.5 rainfall days, 104mm (4.09") of precipitation is typically accumulated. In San Antonio, during the entire year, the rain falls for 153.2 days and collects up to 865mm (34.06") of precipitation.

Daylight

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

Sunshine

In San Antonio, Paraguay, 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 in San Antonio. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The daily high UV index of 7 during December translates into the following recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.