With year-round humidity, Israel experiences a hot summer, pleasant spring and fall, and a mild winter. Ben Gurion Airport is Israel’s main entry point. High security means travelers should be prepared to undergo searches and questioning. Carry a passport valid for six months past your entry date. Drivers can cross Israel in seven hours from north to south. Buses are the most common means of public transportation. Currency is the Israeli shekel; banks close from Friday afternoons until Sunday mornings. Tips are expected: between 12 and 15 percent on a restaurant bill, and most Israelis round up the cost of a taxi or bar tab and leave the change. Electricity is rated as 220V 50Hz with an "H" type plug, so bring an adapter.