Bay of Plenty from 9–16 °C in winter to 22–26 °C in summer. Rainfall occurs more frequently in winter than in summer, but tropical storms in summer and autumn can produce heavy rain with high winds. Central parts of the region can receive up to 2000 mm of rainfall annually, while the eastern and western areas can receive up to 4000 mm. The sub-national GDP of the Bay of Plenty region was estimated at US$6.689 billion in 2003, 5% of New Zealand's national GDP. Agriculture, natural resources and tourism are the major industries. Most (96 per cent) of the region is defined as
Bay of Plenty the region lies within the Taupo Volcanic Zone, which extends from the centre of the North Island northwards to Whakaari/White Island. Volcanic mountains and lakes, geothermal areas and geological fault lines all dot the landscape. The geothermal region around Rotorua is a major tourist site, while many hot springs in the region are used as swimming areas. The geothermal field near Kawerau is the site of a geothermal power plant that will reportedly meet up to one third of residential and industrial electricity demand in the Eastern Bay of Plenty. Whakaari/White Island, the site of a former sulfur-mining operation, is