September Weather in Costa Rica: A Lush Invitation to the Rainforest

Partially clouded afternoon at the beach in the Osa Peninsula
 

September in Costa Rica: Lively Greenery & Cultural Activities

The weather in Costa Rica in September—we'll be straight with you—is wet. The months of September and October are the two rainiest months of the year in Costa Rica, so if you're planning a September vacation, expect to get wet. But this isn't necessarily a bad thing. In fact, for nature lovers, it's a decidedly good thing. The rainforests glisten with raindrops that bring out all the shades of green you can imagine.