Weather is probably a major factor when you plan your trip to Puerto San Jose, but bear 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 temperature of 28°C, while the coldest months are January and December, with an average of 26°C. The rainiest months in Puerto San Jose are June, September, October and August, with each month seeing an average of 290 mm of rainfall.