Hamilton's climate is oceanic (Köppen: Cfb ), with highly moderated temperatures due to New Zealand's location surrounded by ocean. As the largest inland city in the country, winters are cool and mornings can feature the coldest temperatures of the North Island's main centres, dropping as low as −3 °C (27 °F) several times per year. Nighttime temperatures are even cooler outside of the city. Likewise, summers can be some of the warmest in the country with temperatures rising over 28 °C (82 °F), on an annual basis. Hamilton also features very high humidity (similar to tropical climates such as Singapore) which can make temperatures feel much warmer or colder than they are.