Weather is probably a major factor when you plan your trip to Puerto Sandino, 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 29°C, while the coldest months are December and January, with an average of 27°C. The rainiest months in Puerto Sandino are October, September, June and May, with each month seeing an average of 397 mm of rainfall.