Australia in September 2014

In Brief

Maximum temperatures during September were warmer than average across all of Australia except parts of Queensland and New South Wales, with areas of central and coastal southern Western Australia recording their warmest days for September. Minimum temperatures were warmer than average for Western Australia except the Kimberley, western and central South Australia, Tasmania and the coast of Victoria and southern and central New South Wales. Minima were cooler than average across much of northern Australia and smaller areas in southern New South Wales and eastern South Australia. The national maximum temperature anomaly of +2.03 °C was the fifth-highest on record for September, while minimum temperatures were 0.41 °C warmer than average, combining to give a mean temperature anomaly of +1.22 °C.

September rainfall was above average for central eastern Queensland, northwestern New South Wales and across parts of Western Australia including the Pilbara, Gascoyne and parts of the south coast. Across most of the remainder of Australia rainfall was below average for September and in the lowest 10% of records for large areas of Tasmania, western Victoria and far southeastern South Australia. For Australia as a whole, rainfall was 27% below average for September.


Temperatures

September was a warm month for Australia; particularly in the west where both days and nights were warmer than average leading to Western Australia's second-warmest September mean temperature (+1.97 °C). Maximum temperatures during September were above average to highest on record for Western Australia with the anomaly for that State highest on record for September, coming in at +2.75 °C. Maxima were also above to very much above average for the Northern Territory, western and northern Queensland, South Australia, southern and northeastern New South Wales inland of the Great Dividing Range and in the highest 10% of records for most of Victoria and all of Tasmania. The Tasmanian September maximum temperature anomaly was their second-highest on record at +1.93 °C and Victoria's +2.01 °C their seventh-highest. Queensland and New South Wales were the only regions with an area-averaged anomaly outside of the twelve warmest on record for September. September maxima were in the highest 10% of records for 49% of Australia in total. Maxima were cooler than average for a small area of central eastern Queensland, associated with above-average rainfall in the region.

Minimum temperatures were below average for much of far northern Australia and for areas of New South Wales inland of the Great Dividing Range in the south and in South Australia across the Riverlands. Western Australia recorded the largest departure from mean with nights on average 1.18 °C warmer than average for their sixth-warmest September. Minimum temperatures were in the highest 10% of records for nearly all of Western Australia south of the Kimberley, above average for South Australia except along the eastern border, across Tasmania and along parts of the coast in the mainland southeast across the Yorke and Fleurieu peninsulas in South Australia, most of Victoria and extending north to around Port Macquarie.


Areal average temperatures
Maximum Temperature Minimum Temperature Mean Temperature
Rank
(of 105)
Anomaly
(°C)
Comment Rank
(of 105)
Anomaly
(°C)
Comment Rank
(of 105)
Anomaly
(°C)
Comment
Australia 101 +2.03 5th highest = 67 +0.41 93 +1.22
Queensland 87 +1.05 = 49 −0.16 = 70 +0.44
New South Wales 84 +1.47 = 70 +0.44 79 +0.95
Victoria 99 +2.01 7th highest = 69 +0.26 94 +1.13
Tasmania 104 +1.93 2nd highest (record +2.21 °C in 2001) 89 +0.64 101 +1.28 5th highest
South Australia 95 +2.33 86 +0.96 94 +1.64
Western Australia 105 +2.75 highest (was +2.31 °C in 1980) 100 +1.18 6th highest 104 +1.97 2nd highest (record +1.98 °C in 1981)
Northern Territory 94 +2.07 37 −0.70 71 +0.68

Rank ranges from 1 (lowest) to 105 (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 September was 27% below the long-term mean. The Northern Territory, Kimberley, the east of Western Australia and much of northern Queensland recorded below-average monthly rainfall. The Northern Territory recorded the largest departure from mean with rainfall 99% below average for their fourth-lowest September rainfall, although totals are typically low at this time of the year during the 'build up'. Rainfall was also below average for western and southern South Australia, Tasmania, most of Victoria and much of eastern New South Wales. For parts of southeastern South Australia, western Victoria and Tasmania rainfall was in the lowest 10% of records for the month to lowest on record for an area of Victoria around and north of Colac.

September rainfall was above average for an area of northwestern New South Wales and adjacent South Australia as well as a large area of central eastern Queensland extending from the Central Highlands to around Townsville. Several locations in Queensland set new daily rainfall records for September in an event late in the month when totals of 50 mm or more were broadly recorded. Rainfall was also above average in parts of western and southern Western Australia from the Pilbara and Gascoyne through the Goldfields District to the Eucla. Rain along parts of the west coast will help moderate rainfall deficiencies in the region. Carnarvon (33.2 mm for the month) saw its best rain in two and a half years, with their highest monthly total since March 2012.


Area-average rainfall
Rank
(of 115)
Average
(mm)
Departure
from mean
Comment
Australia = 44 12.1 −27%
Queensland 83 15.0 +17%
New South Wales 38 23.1 −34%
Victoria 22 42.2 −36%
Tasmania 11 83.7 −39%
South Australia 24 7.4 −57%
Western Australia 67 9.9 −6%
Northern Territory 4 0.1 −99% 4th lowest (record 0.0 mm in 1938)
Murray-Darling Basin 38 22.7 −33%

Rank ranges from 1 (lowest) to 115 (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 September 2014
Hottest day   41.1 °C at Fitzroy Crossing Aero (WA) on 29 September
Coldest day   −2.7 °C at Thredbo AWS (NSW) on 3 September
Coldest night   −8.3 °C at Thredbo AWS (NSW) on 3 September
Warmest night   26.1 °C at Darwin NTC AWS (NT) on 28 September
Wettest day   80.6 mm at Yaamba (Qld.) on 23 September


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 12 pm EST on Wednesday 1 October 2014. 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 May 2009; the main effect was that current and historical values for Tasmania were increased. Since December 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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