When traveling to Costa Rica, you need to be prepared for a wide range of temperatures ranging anywhere from 10 to 35 degrees Celsius depending on where you travel.
Also be sure to bring a swimsuit, sunscreen, good walking shoes and water sandals. A money belt is also recommended to avoid being pickpocketed while on the go.
Rapid changes in temperature and the possibility of rain mean you need to be prepared. Therefore, it is recommended to bring light-weight and fast-drying clothing.
SOURCE: crsurf . com/trips . html