April 2023 in New Zealand had an average temperature of 14.4C ,+1.1C above the 91-20 norm (left).
It was mostly drier than average excluding few small areas (right).
New Zealand hasn't recorded any colder than average months since March 2020 (Feb 2021 about average).
Maps by NIWA
https://nitter.moomoo.me/extremetemps/status/1653829274212749312#m