according to the niwa, auckland has a subtropical climate, with warm, humid summers and mild, rainy winters. under köppen's climate classification, the city has an oceanic climate ("cfb"). it is the warmest main centre of new zealand and is also one of the sunniest, with an average of over 2000 sunshine hours per annum. the average daily maximum temperature is in february and in july. the absolute maximum recorded temperature is , while the absolute minimum is . high levels of rainfall occur almost year–round with an average of per year spread over 136 rain days, but is most frequent in winter. snowfall in auckland is extremely rare; recorded instances include 27 july 1939 and 15 august 2011, although without any accumulation.