Weather is probably a major factor when you plan your trip to Puerto San Jose, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and March with an average temp of 82°F, while the coldest months are January and December with an average of 80°F. The rainiest months in Puerto San Jose are June, September, October, and August, with each month seeing an average of 11 inches of rainfall.