When to go: Argentina's summer begins in December and runs until February, and Buenos Aires can be quite warm with average temperatures ranging from 83 to 86 degrees Farenheit. Spring and Fall are more milder seasons, with temperatures in the mid 60's to mid 70's. Different regions of Argentina vary greatly in their climate, so if you are planning to visit areas outside of Buenos Aires, be sure to check the weather for those regions as well.
Currency: Peso; the exchange is (generally) about 3 peso's to one US Dollar.
Time Zone: Argentina is two hours behind Eastern Standard Time during (U.S) Daylight Savings and one hour the rest of the year.
Documentation required: U.S. citizens need a passport but do not currently need a visa to visit Argentina. For more information visit http://www.travel.state.gov