This pattern delivered more frequent warm northerly and north-easterly winds than normal, consistent with La Nina conditions.
The summer got off to a hot start with nearly the entire country observing well-above average warmth during December, which was the second warmest December on record.
January 2018 was the hottest month on record for New Zealand with a mean of 20.3C.
February was characterised by the passage of ex-tropical cyclones Fehi and Gita, which brought significant amounts of rainfall to parts of the country.
Alexandra had the highest temperature of 38.7C on January 30 Mt Cook Airport and Tekapo had the lowest temperature of 0.2C on December 20.
Upper Takaka had the highest one-day rainfall of 297mm on January 17 Akitio had the strongest wind gust of 165km/h on December 19.
Of the main centres:
Auckland was warmest, Hamilton was wettest and least sunny.
Wellington was sunniest, Dunedin was coolest and driest.