May in Bocas del Toro is the rainiest month of the year. In May, the weather in Bocas del Toro is typically warm. Average daily high temperature in May is about 21 degrees above zero. On average, Bocas del Toro has 31 rainy days in May. The rains are usually heavy. May as well as April, June, July, and August is considered the most uncomfortable time to visit Bocas del Toro.