The nationwide temperature reached an average of 11.9C, beating the previous record by 1.3C set in September 1991-2020.
September also brought extreme wind in Hawke’s Bay. Cape Turnagain recorded the highest wind gust at 246 km/h, on September 17.
Rainfall for the southern parts of Hawke’s Bay was below average, yet soil moisture levels across the region remained near normal.
Niwa’s monthly climate summary found temperatures were higher than average and 14 places across the country set new record high temperatures for September.