January in Manzanillo is the sunniest month of the year. In January, the weather in Manzanillo is typically hot. Average daily high temperature in January is about 29 degrees above zero. On average, Manzanillo has 26 sunny, 4 partly cloudy, and 1 rainy day in January. The rains are usually light. January as well as February, March, and December is considered the most comfortable time to visit Manzanillo.