Language: Modern Greek. Most Greeks also speak English as a second language.

Currency: Greece is a full member of the European Union, thus meaning its currency is the Euro (€). All major credit cards are widely accepted in Greece.
Currency Converter 

Climate: The climate in Greece is mostly dry and temperate, though it snows in the mountains and in the North during winter. In Athens, Southern Greece and the islands, a typical Mediterranean climate is observed with warm and dry summers and mild winters. At the end of June – early July, temperatures usually range from 23^o to 31^o Celsius.
Weather in Athens

Visa requirements: Greece follows the Schengen Agreement provisions and the subsequent acquis concerning short-term visa issues.  Countries applying the Schengen acquis in full (EU countries: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Italy, Luxembourg, The Netherlands, Portugal, Spain, Sweden, plus associated countries: Iceland and Norway) follow a common visa policy for short-term stays of up to three (3) months in the Schengen area. The citizens of these countries are not subjected to border controls within the common area (airlines or other carriers require identification (ID) Card or passport or any other piece of identification issued by a public authority).

Citizens of the following EU and other European countries do not need a visa to enter Greece (and the Schengen area). They have only to produce a passport or an ID card at the border:

Cyprus, Czech Republic, Estonia, Ireland, Latvia, Lichtenstein, Lithuania, Hungary, Malta, Poland, Slovakia, Slovenia, Switzerland, United Kingdom

For holders of regular passports of the following countries who wish to visit Greece (and the Schengen area) and stay up to 3 months (90 days) within a six (6) month period, no visa is required:

Holders of regular passports from the rest of the world need a visa in order to enter Greece (and the Schengen area). You may visit the following internet address for a full list of Greek embassies abroad: http://www.mfa.gr/english/the_ministry/missions/index.html