May in Clearwater is the sunniest month of the year. In May, the weather in Clearwater is typically warm. Average daily high temperature in May is about 25 degrees above zero. On average, Clearwater has 19 sunny, 6 rainy, 5 partly cloudy, and 1 cloudy day in May. The rains are usually moderate. May as well as April and November is considered the most comfortable time to visit Clearwater.