South Island weather: Blenheim hits 36C in another day of record-breaking temperatures 27 Jan, 2021 04:32 AM 5 minutes to read Sumner Beach in Christchurch on Tuesday. Photo / George Heard Digital producer, Christchurch, NZ Heralddevon.bolger@nzme.co.nz There has been little relief for South Islanders with another day of record-breaking temperatures with the mercury topping 36C in Blenheim. It's not just the South Island either today, with some parts of the North also creeping above 30C. For the first time since 1954, Christchurch topped 35C two days in a row, according to Metservice. Blenheim also hit 36.1C at 4pm, smashing its January temperature record set in 1972.