May in La Massana is the rainiest month of the year. In May, the weather in La Massana is typically warm. Average daily high temperature in May is about 10 degrees above zero. On average, La Massana has 23 rainy, 5 sunny, 2 cloudy, and 1 partly cloudy day in May. The rains are usually heavy. May as well as January, February, March, and April is considered the most uncomfortable time to visit La Massana.