 Eastern parts of the South Island are highly susceptible to the norwester, a Fohn wind which can result in temperatures going into the high 30s and even the low 40s.Rangiora in Canterbury holds the record maximum of 42.4 °C recorded in 1973, with Christchurch recording 41.6 °C in that same year.More recently, Timaru reached 41.3 °C on Waitangi Day in 2011.