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Why does New Zealand have a temperate climate while most Pacific Islands have tropical climates?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
Map of the Pacific Islands region showing political boundaries, major island groups, and countries such as Papua New Guinea, Fiji, Samoa, French Polynesia, and Kiribati. The map uses color shading to indicate elevation and ocean depth, with key islands and capitals labeled throughout the central and southwestern Pacific Ocean.
Pacific Islands

New Zealand’s temperate climate, in contrast to the tropical climates of most other Pacific Islands, is primarily determined by its latitude, isolation, and physical characteristics.1

While the majority of the Pacific Islands are located within the tropics—where temperatures, humidity, and rainfall remain relatively uniform throughout the year—New Zealand is situated at a higher latitude, which naturally results in a temperate climate. New Zealand's weather is influenced by a constant movement of high-pressure anticyclones and middle-latitude cyclones that cross the country from west to east, creating seasonal variations and temperature ranges that are not found in the tropical regions of the Pacific.21

Additionally, New Zealand's complex topography, including high mountain chains like the Southern Alps/Kā Tiritiri o te Moana, plays a significant role in shaping its local climates, leading to sharp contrasts in weather patterns across the country.13