December in Cam Ranh Bay is the windiest month of the year. In December, the weather in Cam Ranh Bay is typically warm. Average daily high temperature in December is about 25 degrees above zero. On average, Cam Ranh Bay has 19 rainy, 8 cloudy, 3 sunny, and 1 partly cloudy day in December. The rains are usually heavy. December as well as July, September, October, and November is considered the most uncomfortable time to visit Cam Ranh Bay.