New Zealand climate projections are quantified with references in Table 11.3b. Further warming is projected, with more hot days, fewer cold days, less snow and glacial ice, ongoing sea level rise  and ocean acidification . Increases in winter and spring rainfall are projected in the west of the North and South Islands, with drier conditions in the east and north, caused by stronger westerly winds . In summer, wetter conditions are projected in the east of both islands, with drier conditions in the west and central North Island . Fire weather indices are projected to increase over northern and eastern New Zealand . Heavy rainfall intensity is projected to increase over most regions, with increased extreme wind speeds in eastern regions, especially in Marlborough and Canterbury, and reduced relative humidity almost everywhere, except for the west coast in winter . Drought frequency may increase in the north .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report