Photo taken on May 31, 2021 shows a flooded road in Christchurch, New Zealand. Downpours and floods that forecasters said could be "one-in-a-hundred-year" continued to hit New Zealand's South Island on Monday after a whole day and night's persistent and heavy rain that started on Sunday.(Photo: Xinhua)

New Zealand recorded its hottest June on record as temperatures continued to soar in a pattern consistent with global warming, a government scientific agency said Tuesday.

Daily temperatures averaged 10.6 C - 1.9 C above average despite a cold snap late in June, the National Institute of Water and Atmospheric Research (NIWA) said.

"It's huge. There's only been 13 times since 1909 that we've had such an anomaly," NIWA scientist Chris Brandolino told public radio.

"What's alarming is that over the past 10 years that's happened six times."

Brandolino said that while shorter-term factors such as warmer ocean temperatures helped heat the air over New Zealand, climate change was a constant underlying factor.

"We've had more north-easterly air flows than normal [from the Pacific], so they're coming from a warm place, and ocean temperatures are also warmer than average," he explained.

"Then you throw in the background of climate change and it adds up to a record warm month for June."

New Zealand had its seventh-hottest year in 2020, which was also the seventh year in a decade that temperatures have been in the top 10 highest ever recorded.

AFP