Weather will likely play an important role when you plan your trip to Puerto Manzano, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually January and February with an average temp of 54°F, while the coldest months are July and August with an average of 35°F. The rainiest months in Puerto Manzano are June, August, July, and May, with each month seeing an average of 11 inches of rainfall.