Weather will likely play an important role when you plan your trip to Manzanillo, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually March and April, with an average temperature of 27°C, while the coldest months are December and January, with an average of 26°C. The rainiest months in Manzanillo are October, September, June and August, with each month seeing an average of 390 mm of rainfall.