April in Falmouth is the sunniest month of the year. In April, the weather in Falmouth is typically warm. Average daily high temperature in April is about 12 degrees above zero. On average, Falmouth has 13 rainy, 7 sunny, 7 partly cloudy, and 3 cloudy days in April. The rains are usually moderate. April as well as January, February, March, and May is considered the most uncomfortable time to visit Falmouth.