In December, the weather in Pedro Juan Caballero is typically hot. Average daily high temperature in December is about 29 degrees above zero. On average, Pedro Juan Caballero has 23 rainy, 6 sunny, 1 cloudy, and 1 partly cloudy day in December. The rains are usually heavy. December as well as January, February, and March is considered the most uncomfortable time to visit Pedro Juan Caballero.