December in Cotabato is the sunniest month of the year. In December, the weather in Cotabato is typically hot. Average daily high temperature in December is about 30 degrees above zero. On average, Cotabato has 23 rainy, 4 sunny, 3 cloudy, and 1 partly cloudy day in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Cotabato.