March 2023 in New Zealand had an average temperature of 15.9C,which is 0.1C above the 1991-2020 normal (left map)
Monthly Records set:
19.1C Dunedin highest Tmin
4.2C Whangharei lowest Tmin
8.0C Ashburton lowest Tmax
It was very rainy in the South Island (right map)
Maps by NIWA
https://nitter.moomoo.me/extremetemps/status/1646045491967459328#m