The usual climate throughout the country is mild, mostly cool temperate to warm temperate, with temperatures rarely falling below 0°C or rising above 30°C. Conditions vary from wet and cold in Southland and the West Coast of the South Island, where most of the country's rain falls, to subtropical in Northland. In Wellington the average minimum temperature in winter is 5.9°C and the average maximum temperature in summer is 20.3°C.
The judiciary consists of the Supreme Court of New Zealand, the Court of Appeal of New Zealand, the High Court, the District Courts, and other courts and tribunals. Some Judges may sit on more than one.
New Zealand has a population of slightly over 4 million. About 80% of the population is of European descent. Maori people are the second largest ethnic group (14.7%). Between the 1996 and 2001 censuses, the number of people of Asian origin (6.6%) overtook that of Pacific Islanders (6.5%) (note that the census allowed multiple ethnic affiliations).
New Zealand functions as a constitutional monarchy with a parliamentary system of government. The basic system is closely patterned on that of the United Kingdom, although a number of significant modifications have been made. The head of state is Queen Elizabeth II, but actual government is conducted by a Prime Minister and Cabinet drawn from an elected Parliament.
Confronted like Australia with the strategic implications of Britain's 20th-century eclipse as a world power of the first rank, New Zealand joined with Australia and the United States in the ANZUS pact in 1951, but the US suspended its defence commitments to the country in 1986 after the then Labour government banned nuclear-powered or armed ships from New Zealand ports.
New Zealand imports much of its cultural material from overseas, particularly from Britain or the United States. Most successful Hollywood films screen on New Zealand cinema screens and New Zealand Television shows a lot of British and American television programmes. It is somewhat ironic that some of these programmes are now made in New Zealand but receive their first screening elsewhere. The New Zealand cinematographic industry is becoming one of the country's major export enterprises, with several major motion pictures being filmed on New Zealand locations recently, including the highly acclaimed film adaptation of Tolkien's "The Lord of the Rings" directed by the Kiwi Peter Jackson.
The Cabinet, which is responsible to Parliament, exercises executive authority. (The Cabinet forms the practical expression of a formal body known as the Executive Council.) The Prime Minister, as the leader of the political party or coalition of parties holding the majority of seats in the House of Representatives, leads the Cabinet. All Cabinet Ministers must be Members of Parliament (MPs) and are collectively responsible to it.
While New Zealand men often take pride in being 'strong, silent types', this attitude may have a downside in contributing to New Zealand having one of the highest suicide rates among young males in the industrialised world.
New Zealand has no native land mammals apart from some rare bats. Later Maori largely subsisted by cultivating the kumara, a type of sweet potato, which they had brought with them from Polynesia.
New Zealand became a British colony in 1840 following the signing of the Treaty of Waitangi between the Crown and Maori chiefs. The Crown was represented by William Hobson, who was Lieutenant-Governor of New Zealand. At that time New Zealand was a dependent colony of New South Wales.
Since 1984 successive governments have engaged in major economic restructuring, transforming New Zealand from a highly protectionist and regulated economy to a liberalised, free-trade economy. Despite periods of dynamic growth in the mid 1980s and early '90s, average yearly economic growth has been poorer than expected and is highly reliant on massive levels of immigration to boost GDP. However, since 1999 New Zealand has enjoyed a period of relatively strong and sustained growth.
In 2004 it began discussing free trade with China, one of the first countries to do so.
Maori population figures plummetted after 1820 due to tribal wars (the musket wars) and to unfamiliar diseases - measles, whooping cough, influenza and later typhoid - reducing an initial Maori population of perhaps 100,000 to 120,000 (lower than many contemporary figures, which probably overestimated densities in the South Island) to only 62,000 by 1857 and 44,000 in 1891. Recovery began slowly (though three decades earlier than among Australia's still worse-affected Aborigines), with numbers reviving steadily after the setback of the 1918 influenza pandemic. By 1900 also, Maori had lost most of their land, usually as a result of sales or of confiscations after armed conflict with the settler government.
New Zealand has no formal, written constitution; the constitutional framework consists of a mixture of various documents (including certain acts of the United Kingdom and New Zealand Parliaments) and constitutional conventions. Most constitutional provisions became consolidated into the Constitution Act 1986. There have, at times, been proposals for a formal constitution, but there have not yet been any serious moves to adopt one.