December weather forecast
Lima, Paraguay

Closing the year, December sees steady weather conditions with slight increases in rainfall and humidity levels. The temperatures hold steady from November, contributing to the continuation of the summer season. However, a decrease in sunshine days indicates increased cloud coverage, infusing a different allure. The charm of Lima remains intact throughout the year, making it an attractive destination regardless of the season.

Temperature

In December, the average high-temperature in Lima registers at a still hot 31.8°C (89.2°F), nearly identical to November's 31°C (87.8°F). December in Lima, Paraguay, sees the temperature falling to a mean low of 21.1°C (70°F).

Heat index

The heat index for December is appraised at a blistering 42°C (107.6°F). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for 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.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

In December, the average relative humidity in Lima is 76%.

Rainfall

In December, in Lima, the rain falls for 20.5 days. Throughout December, 120mm (4.72") of precipitation is accumulated. Throughout the year, in Lima, there are 166 rainfall days, and 911mm (35.87") of precipitation is accumulated.

Daylight

December has the longest days of the year in Lima, with an average of 13h and 36min of daylight.
On the first day of the month, sunrise is at 05:49 and sunset at 19:20. On the last day of December, sunrise is at 06:01 and sunset at 19:36 -03.

Sunshine

In Lima, the average sunshine in December is 10.3h.

UV index

January and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: An average maximum UV index of 7 in December leads to these recommendations:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.