Is it cold in New Zealand?

According to the First Life website, the weather in New Zealand is not cold. Winter in New Zealand is from June to August. The average temperature in winter is about 10 degrees, and the annual temperature difference does not exceed 15 degrees. New Zealand lies between Oceania, the South Pacific, Antarctica and the equator. Tasman sea borders Australia in the west, with a distance of 1600km, and Tonga and Fiji in the north. New Zealand consists of North Island, South Island, Stewart Island and some small islands nearby, with an area of 270,534 square kilometers and a coastline of 6,900 kilometers.