February in Formosa is the rainiest and the cloudiest month of the year. In February, the weather in Formosa is typically hot. Average daily high temperature in February is about 32 degrees above zero. On average, Formosa has 12 rainy, 8 sunny, 7 partly cloudy, and 2 cloudy days in February. The rains are usually heavy. February as well as December is considered the most uncomfortable time to visit Formosa.