Australia in June 2015

In brief

June rainfall was higher than average for much of the Northern Territory and large parts of Queensland and New South Wales, and some adjacent parts of South Australia. Rainfall was below average for much of Western Australia, much of coastal South Australia, a large part of Victoria, northern Tasmania, and small areas along the east coast. Nationally, rainfall was 10% below average.

Maximum temperatures for June were warmer than average across the north and west of Australia and also for parts of eastern New South Wales. Maxima were generally near-average for the remainder of the southeast. Nationally, maximum temperatures were the sixth-warmest on record for June, at 1.37 °C warmer than average. For Western Australia, June maxima were the warmest on record.

Minimum temperatures were warmer than average for much of Australia, especially Queensland, but cooler than average for part of the mainland southeast and near-average for the remainder of the southeast and part of northwestern Australia. The national average for minima was 1.32 °C above average. For Queensland, June minima were the third-warmest on record.


Temperatures

The national June mean temperature was 1.35 °C above average, Australia's fifth-warmest June on record for mean temperatures. Maximum temperatures averaged across the nation were the sixth-warmest on record at 1.37 °C above average. While placed outside the top ten, minimum temperatures were nonetheless also much warmer than average at 1.32 °C above the long-term mean. It was the warmest June on record for Western Australia as a whole in terms of maxima, while for Queensland minima were the third-warmest on record for June.

Maximum temperatures were warmer than average across all of Western Australia, adjacent parts of South Australia, through the Northern Territory, across nearly all of Queensland, and also in inland northeastern New South Wales and along most of the east coast of New South Wales, extending just into northeastern Victoria. For much of northern Australia and nearly all of Western Australia June maxima were in the highest 10% of observations (decile 10). It was the warmest June on record overall at many locations in Western Australia. A number of locations in the South West Land Division of Western Australia also observed their warmest June day on record on the 5th as an approaching cold front and high pressure system over the mainland directed warm northwesterly winds into the region.

Maxima were generally close to average over the remainder of New South Wales and Victoria, central and eastern South Australia, and Tasmania. Small pockets of northwestern New South Wales and adjacent South Australia observed cooler-than-average maximum temperatures for June.

Minimum temperatures were warmer than average for most of Western Australia, the Top End and east of the Northern Territory, through central Australia, across Queensland and northern New South Wales, and also for a small area of coastal southwestern Victoria and the adjacent tip of southeastern South Australia. Minima were in the highest 10% of observations (decile 10) for most of Queensland and an area of Western Australia's interior near the eastern border. For June as a whole, minimum temperatures were the warmest on record for June at a number of locations in Queensland, although daily records were few. In the west of Western Australia, a number of locations observed their warmest June night on record on the 20th or 21st.

Minimum temperatures were generally near average across the Kimberley, the inland west of the Northern Territory, across the south of South Australia, and across most of the southeast, including Tasmania, except for northern New South Wales. Minimum temperatures were below average for a large area of southeastern New South Wales and eastern Victoria, an area between Mildura and Broken Hill, and other scattered small pockets.


Areal average temperatures
Maximum Temperature Minimum Temperature Mean Temperature
Rank
(of 106)
Anomaly
(°C)
Comment Rank
(of 106)
Anomaly
(°C)
Comment Rank
(of 106)
Anomaly
(°C)
Comment
Australia 101 +1.37 6th highest; highest since 1996 96 +1.32 102 +1.35 5th highest; highest since 1996
Queensland 96 +1.48 104 +3.01 3rd highest (record +3.69 °C in 1921) 104 +2.24 3rd highest (record +2.82 °C in 1996)
New South Wales 70 +0.30 = 73 +0.66 82 +0.48
Victoria = 52 −0.15 39 −0.15 45 −0.14
Tasmania = 28 −0.58 48 −0.05 39 −0.31
South Australia = 72 +0.46 74 +0.72 = 75 +0.59
Western Australia 106 +2.23 highest (was +1.74 °C in 1962) = 88 +0.94 104 +1.59 3rd highest (record +2.09 °C in 1996)
Northern Territory 94 +1.27 81 +1.00 86 +1.14

Rank ranges from 1 (lowest) to 106 (highest). A rank marked with ’=‘ indicates the value is tied for that rank. Anomaly is the departure from the long-term (1961–1990) average.


Temperature maps
MeanAnomalyDeciles
Mean
daily
maximum
temperatures
Map of mean daily maximum temperature Map of mean daily maximum temperature anomalies Map of mean daily maximum temperature deciles
Mean
daily
minimum
temperatures
Map of mean daily minimum temperature Map of mean daily minimum temperature anomalies Map of mean daily minimum temperature deciles
Mean
daily
temperatures
Map of mean daily temperature Map of mean daily temperature anomalies Map of mean daily temperature deciles

Rainfall

Nationally-averaged rainfall during June was 10% below the long-term mean.

Rainfall was above average for the east of the Northern Territory and parts of northern Queensland, as well as for parts of northeastern South Australia and the Murray–Darling Basin, although not in Victoria. Overall, June rainfall was 36% above average over the Murray–Darling Basin. A southerly dip in an offshore trough brought showers and storms to parts of the eastern Top End and Cape York Peninsula in Queensland, with some locations in the Northern Territory and Queensland observing their wettest June day on record on the 1st. A few locations in southern Queensland also observed their wettest June day on record on the 16th or 17th when a broad, slow-moving surface trough brought moderate falls to large parts of eastern Australia around and just after mid-month. While this rainfall was welcomed by farmers experiencing deficiencies, it had little effect on long-term deficits.

Rainfall was below average for small areas along the east coast and for large parts of the southern coastline of Australia and northern Tasmania; particularly central Victoria to South Gippsland, southeastern South Australia, and southwest Western Australia where rainfall was in the lowest 10% of historical observations (decile 10) for large areas. A number of locations in Victoria and southwest Western Australia recorded their driest June in 100 years or more. Rainfall was also below average for much of the north of Western Australia, although rainfall is seasonally very low in this region at this time of year.


Area-average rainfall
Rank
(of 116)
Average
(mm)
Departure
from mean
Comment
Australia 41 20.7 −10%
Queensland 78 23.0 +24%
New South Wales 81 48.6 +26%
Victoria 21 41.4 −30%
Tasmania 39 111.1 −13%
South Australia 53 16.4 −14%
Western Australia 25 14.0 −45%
Northern Territory 75 8.4 +22%
Murray-Darling Basin 83 45.6 +36%

Rank ranges from 1 (lowest) to 116 (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
TotalsPercentagesDeciles
Total
rainfall
Map of total rainfall Map of percentage of normal rain Map of rainfall deciles


Australian weather extremes during June 2015
Hottest day   36.3 °C at Fitzroy Crossing Aero on 1 June (WA)
Coldest day   −5.4 °C at Mount Hotham (Vic.) on 1 June
Coldest night −10.4 °C at Perisher Valley AWS (NSW) on 3 June
Warmest night   26.2 °C at Troughton Island (WA) on 1 June
Wettest day 151.0 mm at Topaz Alert (Qld.) on 30 June


Notes

The Monthly Climate Summary is prepared to list the main features of the weather in Australia using the most timely and accurate information available on the date of publication; it will generally not be updated. Later information, including data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review, usually published in the fourth week of the month.

Climate Summaries are usually published on the first working day of each month.

This statement has been prepared based on information available at noon EST on Wednesday 1 July 2015. Some checks have been made on the data, but it is possible that results will change as new information becomes available, especially for rainfall where much more data becomes available as returns are received from volunteers.

Long-term averages in this statement and associated tables are for the period 1961 to 1990 unless otherwise specified.

The system used for calculating areal averages of rainfall was changed in June 2009; the main effect was that current and historical values for Tasmania were increased. Since June 2012, ACORN-SAT has been used for calculating areal averages of temperature; the major change from earlier datasets is that the ACORN-SAT dataset commences in 1910, and hence rankings are calculated using a larger set of years.


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