In an annual summary, the Bureau of Meteorology (BOM) said most regions in Australia had mean minimum temperatures above, or very much above, average.

"[The summary] describes a warm and wet year for most of Australia," BOM climatologist Dr David Wilson said in a press conference.

The past year is tied as the 22nd warmest on record, with the national mean temperature half a degree warmer than the 1961-1990 average.

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Tasmania and parts of north and west Australia drove the national averages up, while NSW, southern Queensland and parts of South Australia saw below average maximum temperatures.

Severe and extreme heatwaves hit the north and west of the country several times in 2022.

And the past year was the ninth wettest on record, with a national average of 587.8 millimetres.

"It was the wettest spring on record for NSW, Victoria and for the Murray-Darling Basin," Dr Wilson said.

Rainfall was 26 per cent above the 1961-1990 average, mainly due to flooding and wet weather in the south-east of Australia.

Western Tasmania, south-west Western Australia and northern regions in the Top End had below average rains.

The rainfall means water storage levels are high around the country except for some areas in Queensland, Tasmania, NSW and Victoria.