Thursday 1 July 2021 — Monthly Summary for Australia — Product Code IDCKGC1A00

Australia in June 2021

Temperatures Rainfall Extremes Important notes the top

In brief

• June rainfall was above average for parts of the eastern mainland, south coast, and Northern Territory, but below average for Western Australia's South West Land Division
• For Australia as a whole, rainfall was 15% above average
• Mean maximum temperatures for June were close to average for large parts of Australia, and for the country as a whole overall
• Mean maximum temperatures warmer than average for the northern tropics and much of south-east Australia, but cooler than average for much of the western half of Western Australia
• Mean minimum temperatures for June were warmer than average for large areas across northern and eastern Australia, and parts of the south coast, but cooler than average for the west of Western Australia, and an area of Central Australia

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Temperatures

The national mean temperature for June was 0.36 °C warmer than average for Australia as a whole.

The mean maximum temperature was above average for June at +0.07 °C. The mean minimum temperature was above average for June at +0.64 °C. Mean minimum temperatures were particularly warm for the south-east, with both Victoria and Tasmania amongst the 10 warmest on record for June.

Mean maximum temperatures for June were warmer than average for the northern tropics in Queensland, the Top End of the Northern Territory, and the northern Kimberley in Western Australia. They were also above average for Tasmania, most of Victoria, and south-east South Australia. Maximum temperatures were below average for most Western Australia and Central Australia, including the Alice Springs District.

Mean minimum temperatures for June were warmer than average for large areas across northern Australia, including most of the northern tropics. Minima for the month were also warmer than average for south-east Australia with large parts of Victoria, Tasmania, south-east South Australia, and south-west New South Wales observing mean minima which were very much warmer than average for the month (highest 10% of historical observations). Mean minimum temperatures for June were cooler than average for a large area along the west coast of Western Australia, extending into the Goldfields District, and also for an area of western Alice Springs District and adjacent Interior District of Western Australia.

Some sites in Tasmania had their highest June mean maximum temperature on record and several, mostly across the north, had their highest June mean minimum temperature on record.

A very strong, widespread cold outbreak brought low temperatures, snow to unusually low elevations in some areas destructive winds across a broad area, and heavy rainfall to south-east Australia over the 9th and 10th. A large number of sites in New South Wales observed record low June daily maximum temperatures.

A vigorous cold front and low pressure system crossed the south of the country towards the end of the month, with a broad cloudband extending across the north. In addition to widespread rainfall, the system brought record low June daily maximum temperatures to parts of Western Australia on the 21st and 22nd. Some sites had their lowest June mean daily maximum temperature on record, or for at least 20 years. A few sites in Western Australia, mostly coastal, had their lowest June temperature on record on the 24th, 25th, or 26th. Some sites had their lowest June mean daily maximum temperature on record, or for at least 20 years.

Temperature maps
	Mean	Anomaly	Deciles
Mean daily maximum temperatures
Mean daily minimum temperatures
Mean daily temperatures

Temperatures Rainfall Extremes Important notes the top

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Rainfall

June rainfall was 15% above average for Australia as a whole. Rainfall for the month was above for most of Victoria and New South Wales, western and parts of inland and central coast Queensland, the central Northern Territory, parts of the Kimberley and north-east Pilbara, and along the south coast in Western Australia and South Australia.

Rainfall for the month was below average for most of Western Australia's South West Land Division, excluding along the south coast, and extending into the Goldfields District, western Tasmania, and parts of Cape York Peninsula in Queensland.

A very strong, widespread cold outbreak brought low temperatures, snow to unusually low elevations in some areas, destructive winds across a broad area, and heavy rainfall to south-east Australia over the 9th and 10th. In Victoria daily rainfall records were set across a number of sites and major flooding resulted in multiple catchments after more than 200 mm of rain fell in 24 hours at some locations in West Gippsland. Mount Baw Baw received 280.6 mm for the 24 hours to 9am on the 10th—the fifth-highest daily rainfall total on record for Victoria for any month and the third-highest for June. A number of sites reached record high totals for June as a whole. High winds brought down trees and caused structural damage across Victoria, with more than 9,000 calls to the Victorian SES for assistance. Power was cut to more than 200,000 premises, with repairs taking several weeks in some locations. Further afield, snow was reported in New South Wales in the Southern and Central Tablelands, the Blue Mountains, and as far north as Inverell and Guyra, and in the Brindabellas and Mount Ginini in the Australian Capital Territory.

In Tasmania heavy rain and severe winds on the 9th left more than 2,000 homes without power and a few sites with their highest June daily rainfall on record. Persistent rain during the second week of the month resulted in moderate flooding along the South Esk and Macquarie rivers, with Flood Warnings and Flood Watches in place for catchments across northern and eastern Tasmania.

On the 17th, a cold front crossed South Australia, bringing widespread falls of 10 to 50 mm across central districts, and resulting in a few daily rainfall records for June.

A broad cloudband tracked across the northern states late in the month, associated with a cold front crossing the south of the continent.

• The vigorous front and low brought widespread rain across south-west Western Australia, resulting in reports of flooding impacts around Albany and Great Southern, and daily rainfall records for June at a number of sites on the 20th or 21st.
• In the south of the Northern Territory Mostly light falls in this typically dry month resulted in a few sites having their highest June daily rainfall on record on the 24th or 25th, and some sites setting new monthly total records for June.
• 25 to 50 mm fell across a large area of western Queensland, with daily rainfall records for June at 2 sites, and flooding near Windorah in the south-west.
• A few sites in northern Victoria and southern New South Wales also set daily rainfall records.

Area-average rainfall
	Rank (of 122)	Average (mm)	Departure from mean	Comment
Australia	80	26.0	+15%
Queensland	86	26.3	+53%
New South Wales	97	57.7	+65%
Victoria	99	84.2	+45%
Tasmania	38	108.5	−13%
South Australia	79	21.8	+21%
Western Australia	45	18.2	−32%
Northern Territory	90	9.8	+56%
Murray-Darling Basin	104	54.5	+81%

Rank ranges from 1 (lowest) to 122 (highest). A rank marked with ’=‘ indicates the value is tied for that rank. Departure from mean is relative to the long-term (1961–1990) average.

Rainfall maps
	Totals	Percentages	Deciles
Total rainfall

Temperatures Rainfall Extremes Important notes the top

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Australian weather extremes during June 2021
Hottest day	35.8 °C	at Bradshaw (NT) on the 3rd and 16th
Coldest day	−2.3 °C	at Thredbo AWS (NSW) on the 17th
Coldest night	−9.5 °C	at Perisher Valley AWS (NSW) on the 5th
Warmest night	26.4 °C	at McCluer Island (NT) on the 3rd
Wettest day	280.6 mm	at Mount Baw Baw (Vic.) on the 10th

Temperatures Rainfall Extremes Important notes the top

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