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.
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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