Historical maxima and minima are 42.4 °C (108.3 °F) in Rangiora, Canterbury and −25.6 °C (−14.08 °F) in Ranfurly, Otago. Conditions vary sharply across regions from extremely wet on the West Coast of the South Island to almost semi-arid in Central Otago and the Mackenzie Basin of inland Canterbury and subtropical in Northland. Of the seven largest cities, Christchurch is the driest, receiving on average only 640 millimetres (25 in) of rain per year and Auckland the wettest, receiving almost twice that amount. Auckland, Wellington and Christchurch all receive a yearly average in excess of 2,000 hours of sunshine. The southern and south-western parts of the South Island have a cooler and cloudier climate, with around 1,400–1,600 hours; the northern and north-eastern parts of the South Island are the sunniest areas of the country and receive approximately 2,400–2,500 hours.