Monday 2 July 2018 — Monthly Summary for Australia — Product Code IDCKGC1A00

Australia in June 2018

Temperatures Rainfall Extremes Important notes the top

In brief

• Days warmer than average for Australia as a whole during June, and nights somewhat cooler than average
• National monthly mean temperature for June above average
• June rainfall below average for Australia as a whole, and very much below average for parts of the east coast of Australia

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Temperatures

June was warmer than average for Australia as a whole; the national monthly mean temperature was 0.33 °C above average.

Maximum temperatures were warmer than average across most of Australia, with a national anomaly of +0.84 °C. Decile 10 mean monthly maximum temperatures (the warmest 10% of historical observations) were observed in parts of the North West Slopes and Plains District of New South Wales, the western Top End in the Northern Territory, the Capricornia District in Queensland, and scattered pockets of the western Kimberley in Western Australia. Mean maxima for June were near average for the South West Land Division and northwestern to central Western Australia, central and southern South Australia, the west of New South Wales and Victoria, much of inland northern Queensland and Cape York Peninsula, and in east coast New South Wales and eastern Victoria.

The national mean minimum temperature for Australia as a whole was 0.17 °C below average for June. Minimum temperatures for the month were cooler than average across most of Victoria away from East Gippsland, western New South Wales, eastern South Australia, much of eastern Queensland, the southeastern Top End in the Northern Territory, and a large area spanning the south of the Northern Territory, the northeast of the Interior District and the eastern half of the Kimberley in Western Australia. Conversely, minima for June were warmer than average for areas in the northwest and south coast of Western Australia, and along the east coast between East Gippsland and the Manning District in New South Wales.

Strong northerly winds warmed temperatures across much of Western Australia during the first week of June, with a number of stations observing record-warm days or nights in the west of the State. Northerly winds also brought record-warm days for some stations in the southwest of the Northern Territory on the 10th or 11th.

During the third week of the month a small number of stations in the eastern half of Australia observed a record cold night for June, but nearly all were sites with less than 30 years of record.

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 below average for Australia as a whole.

Rainfall for the month was below average for the Kimberley and the southwestern quarter of Western Australia, the majority of the Northern Territory, and much of South Australia and the eastern mainland States. June rainfall was very much below average (the lowest 10% of historical observations, decile 1) for some areas along the east coast of Australia, with the largest observed in the North West Slopes and Plains and Northern Tablelands districts inland of the Great Dividing Range in northeastern New South Wales.

A number of stations in New South Wales and Queensland received record low June rainfall, with quite a number more observing their lowest June rainfall for at least 20 years.

June was a wetter than average month for much of the Pilbara, Gascoyne, and parts of adjacent western Interior in Western Australia, as well as the coastal Eucla District in that State, and a large part of western Queensland.

A strong frontal system brought heavy rain and damaging winds along the west coast and south of Western Australia from 4 to 6 June, with some stations setting daily rainfall records for June and minor flooding occurring in the Gascoyne River. A number of sites went on to observe their wettest June in at least 20 years.

In the southeast of the country a deep low-pressure system brought a wet and windy day to Victoria on the 17th, with building damage and some flooding around Melbourne, with a series of cold fronts between the 15th and 18th bringing more rain and heavy snowfall in the Alps. A number of stations set daily rainfall records during this event.

Area-average rainfall
	Rank (of 119)	Average (mm)	Departure from mean	Comment
Australia	32	17.4	−25%
Queensland	33	9.5	−49%
New South Wales	30	26.8	−31%
Victoria	37	52.7	−11%
Tasmania	47	123.4	−3%
South Australia	36	11.6	−39%
Western Australia	67	24.8	−2%
Northern Territory	31	0.7	−90%
Murray-Darling Basin	28	23.4	−30%

Rank ranges from 1 (lowest) to 119 (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 2018
Hottest day	36.7 °C	at Fitzroy Crossing Aero (WA) on the 11th
Coldest day	−4.5 °C	at Thredbo AWS (NSW) on the 16th
Coldest night	−9.5 °C	at Cooma Visitors Centre (NSW) on the 23rd
Warmest night	25.6 °C	at Troughton Island (WA) on the 1st
Wettest day	106.0 mm	at Minnie Water (Pump Shed) (NSW) on the 7th

Temperatures Rainfall Extremes Important notes the top

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