Curaçao's climate is tropical, with a short and unpredictable rainy season between October and February. High season is December through April, and no visas are required for entry. Taxis are easy to flag at the Hato International Airport in Willemstad and in other popular locations but must be pre-arranged by a hotel or other business for more remote areas. Most visitors rent a car. The local currency is the guilder but most places accept U.S. dollars and credit cards. Tipping is 15–20% and American appliances will work on the island without an adapter.