December in Montego Bay is the windiest month of the year. In December, the weather in Montego Bay is typically warm. Average daily high temperature in December is about 27 degrees above zero. On average, Montego Bay has 22 sunny, 6 partly cloudy, and 3 rainy days in December. The rains are usually light. December as well as January is considered the most comfortable time to visit Montego Bay.