December in Horta is the rainiest and the windiest month of the year. In December, the weather in Horta is typically warm. Average daily high temperature in December is about 17 degrees above zero. On average, Horta has 27 rainy, 3 sunny, and 1 cloudy day in December. The rains are usually heavy. December as well as January, February, March, and October is considered the most uncomfortable time to visit Horta.