December in Ca Mau is the coldest month of the year. In December, the weather in Ca Mau is typically hot. Average daily high temperature in December is about 28 degrees above zero. On average, Ca Mau has 22 rainy, 7 cloudy, and 2 sunny days in December. The rains are usually heavy. December as well as April, May, June, and July is considered the most uncomfortable time to visit Ca Mau.