Northern Territory in September 2014: Hot days with cool nights

When averaged across the NT, maximum temperatures in September were 2.1 °C warmer than average with a mean maximum temperature of 33.5 °C (long-term average = 31.4 °C). Most of the unseasonably high temperatures began on 19 September when Middle Point reached 39.5 °C, Pirlangimpi set a new September temperature record with 38.3 °C, and Darwin Airport measured it's hottest day of the month with 37.4 C (only 0.3 degrees below the September record). The following days were also especially warm, Daly Waters Airstrip had 39.3 °C on 20 September and then Douglas River warmed to 39.7 °C on 21 September, which was the highest temperature recorded in the NT this month.

While the days were hot, the overnight temperatures were lower than normal for September. The average minimum temperature for the NT in September was 15.2 °C, which is 0.7 °C below the long-term average (15.9 °C). Across the Top End all stations reported below average minimum temperatures for the month, with most stations between 1 °C and 3 °C below normal. Darwin airport had 9 nights with minimums below 20 °C and ended the month with a mean daily minimum temperature of 21.0 °C, which is 2.0 °C below average. Several sites had their lowest September mean daily minimum temperature on record including Daly Waters with a mean daily minimum temperature of 12.4 °C, which is 4.6 °C below their September average.

Rainfall across the NT was lower than normal, even for a dry season month like September. The Territory average rainfall total for the month was only 0.1 mm, 6.9 mm below average and ranking as the 4th driest September on record. However, there were no new rainfall records set this month.

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Extremes in September 2014
Hottest day 39.7 °C at Douglas River on the 21st
Warmest days on average 37.3 °C at Douglas River
Coolest days on average 28.3 °C at Kulgera
Coldest day 18.2 °C at Kulgera on the 5th
Coldest night 0.3 °C at Arltunga on the 3rd
Coolest nights on average 9.8 °C at Arltunga
Warmest nights on average 24.1 °C at McCluer Island
Warmest night 26.1 °C at Charles Point on the 24th
26.1 °C at McCluer Island on the 26th
Warmest on average overall 28.1 °C at Jabiru Airport
Coolest on average overall 19.3 °C at Arltunga
Wettest overall 2.0 mm at Kulgera
Wettest day 2.0 mm at Kulgera on the 6th
Strongest wind gust 76 km/h at Yulara Airport on the 18th

Maps
ObservedAnomalyDecile rank
Total
rainfall
Map of Rainfall totals Map of Percentage of normal rainfall Map of Rainfall deciles
Mean
daily
maximum
temperatures
Map of Mean maximum temperature Map of Anomaly in mean maximum temperature Map of Decile rank of mean maximum temperature
Mean
daily
minimum
temperatures
Map of Mean minimum temperature Map of Anomaly in mean minimum temperature Map of Decile rank of mean minimum temperature

Click on a map to show it full size in a pop-up window


Record highest September temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Pirlangimpi Airport 38.3 on the 19th 38.0 on the 23rd in 2013 32 33.2



Record lowest September daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Channel Point 28.3 on the 3rd 28.5 on the 13th in 2006 20 31.0



Record highest September mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Pirlangimpi Airport 35.4 34.9 in 2010 31 33.2
Watarrka 31.9 31.7 in 2012 23 29.4



Record lowest September mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Daly Waters Airstrip 12.4 12.8 in 2011 45 17.0
Jabiru Airport 19.2 19.5 in 1985 36 21.6
Gove Airport 17.2 17.6 in 1967 35 19.7
Black Point 21.4 21.5 in 1991 22 23.0
Borroloola Airport 15.0 15.4 in 1994 20 17.7




Summary statistics for September 2014
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
September
2014
Diff
from
average
Highest for
September
2014
Mean for
September
2014
Diff
from
average
Lowest for
September
2014
Total for
September
2014
Average
for
September
Rank of
September
2014
Fraction of
September
average
Darwin-Daly (district 14GA)
Batchelor Airport 36.2 +0.2 38.1 26th     14.9 2nd 0.2 7.4 average 3%
Black Point 31.6 0.0 33.5 19th 21.4 -1.6 18.0 4th 0 0.9 lowest 0%
Central Arnhem Plateau 34.5 +0.7 36.4 21st 17.9 -1.3 11.6 5th 0 6.9 v low 0%
Charles Point 30.2   32.6 28th 22.1   18.9 3rd 0
Croker Island Airport 32.5   35.3 27th 21.0   17.4 6th
Darwin Airport 33.2 +0.6 37.4 19th 21.0 -2.0 17.7 2nd 0 15.3 lowest 0%
Delamere Weapons Range 36.1 +0.4 38.0 21st 18.4 -2.4 12.2 5th 0 3.0 v low 0%
Douglas River 37.3 +0.6 39.7 21st 16.4 -2.3 9.9 1st 0 4.2 lowest 0%
Dum In Mirrie Airstrip 31.0 -0.7 33.9 4th 20.9 -2.3 17.6 4th 0 12.3 v low 0%
Jabiru Airport 37.1 +0.9 38.8 28th 19.2 -2.4 13.9 6th 0 6.8 lowest 0%
Katherine Country Club 36.8   39.1 21st 17.4   11.0 5th 0
Mango Farm 37.1 +0.8 39.0 21st 17.1 -2.2 10.7 1st 0 8.2 lowest 0%
McCluer Island 28.8 -0.4 30.4 22nd 24.1 -0.5 21.7 3rd 0 0.3 v low 0%
Middle Point 37.2 +0.8 39.5 19th 16.3 -2.8 12.4 4th 0 17.2 v low 0%
Murganella Airstrip 32.9   35.8 27th 17.0   11.3 4th 0
Noonamah Airstrip 36.5   38.8 19th 18.2   14.6 3rd 0
Oenpelli Airport 37.2   39.0 27th 18.4   14.6 3rd 0
Pirlangimpi Airport 35.4 +2.2 38.3 19th 19.4 -1.9 16.1 1st 0 26.2 lowest 0%
Point Fawcett 32.0 +0.1 35.1 19th 18.4 -3.0 15.0 3rd
Point Stuart 33.2   35.8 19th 19.8   15.8 2nd
Port Keats Airport 32.8 -0.8 36.0 4th 18.9 -2.1 12.8 5th 0 2.6 v low 0%
Tindal RAAF 36.9 +1.1 39.2 21st 16.7 -3.4 10.4 5th 0 7.5 lowest 0%
Arnhem (district 14BC)
Cape Wessel 31.4   32.5 28th 23.4   20.9 3rd 0.2 6.3 low 3%
Gove Airport 30.8 +0.5 33.5 27th 17.2 -2.5 12.9 5th 0.2 5.6 average 4%
Groote Eylandt Airport 32.2 -0.4 35.1 27th 16.1 -1.8 8.4 5th 0 2.7 v low 0%
Maningrida Airport 32.0 -0.2 34.6 26th 18.6 -1.9 13.1 5th 0.4 4.5 high 9%
Milingimbi Airport 31.7 0.0 34.1 27th 19.9 -1.4 14.2 5th 0 3.8 v low 0%
Ngayawili 31.9 +0.2 35.7 26th 19.1 -1.5 13.0 5th 0 6.4 v low 0%
Warruwi Airport 31.0 +0.1 33.0 26th 22.6 -1.0 18.1 3rd 0 1.0 lowest 0%
Roper-Mcarthur (district 14DE)
Borroloola Airport 35.8 +0.9 38.6 10th 15.0 -2.7 9.3 4th 0 2.2 lowest 0%
Bulman 36.8 +0.6 38.2 21st 15.7 -2.0 9.8 5th 0 3.2 v low 0%
Centre Island 31.1 +0.6 34.6 28th 21.2 -1.0 17.3 5th 1.6 1.4 high 114%
Daly Waters Airstrip 36.6 +1.9 39.3 20th 12.4 -4.6 5.0 5th 0 1.8 lowest 0%
McArthur River Mine Airport 36.7 +1.4 38.6 20th 15.8 -1.5 9.5 4th 0 4.5 lowest 0%
Ngukurr Airport 36.6   38.7 10th 16.7   9.2 5th 0
Wollogorang 34.7 +0.2 38.5 10th 13.3 -2.6 7.0 4th 0 3.7 lowest 0%
Victoria (district 14F)
Lajamanu Airport 35.8 +1.3 38.1 30th 13.9 -2.7 8.8 1st 0 4.2 lowest 0%
Victoria River Downs 37.1 +1.5 38.6 29th 14.9 -3.3 8.2 5th 0 4.1 lowest 0%
Barkly (district 15A)
Brunette Downs 34.5 +1.0 38.1 20th 16.2 -0.5 9.0 4th 0 5.8 lowest 0%
Elliott 35.0 -0.4 38.2 20th 15.4 -2.0 10.5 2nd 0 5.8 lowest 0%
Tennant Creek Airport 33.2 +1.5 36.8 30th 17.9 -0.5 12.9 4th 0 7.6 lowest 0%
Alice Springs (district 15B)
Alice Springs Airport 29.8 +2.5 38.1 30th 9.9 -0.5 2.7 3rd 0 8.2 lowest 0%
Arltunga 28.9 +0.9 37.2 30th 9.8 -1.1 0.3 3rd 0 6.7 lowest 0%
Curtin Springs 30.5 +2.7 37.5 30th 11.8 +1.8 6.5 22nd 0 9.7 lowest 0%
Jervois 30.8 +1.0 39.3 30th 12.3 +1.0 6.4 3rd 0 8.5 lowest 0%
Kulgera 28.3 +1.2 36.3 28th 12.1 +0.7 7.5 5th 2.0 15.2 average 13%
Papunya     37.6 29th 12.8 -0.4 7.1 2nd 0 7.1 lowest 0%
Rabbit Flat 35.1 +0.6 38.7 30th 11.1 -3.4 4.4 1st 0 5.8 v low 0%
Territory Grape Farm 31.7 +1.3 38.0 30th 11.4 -0.7 5.4 3rd 0 10.3 lowest 0%
Walungurru Airport 33.4 +1.5 38.2 30th 17.0 +0.1 9.7 24th 0 8.5 v low 0%
Watarrka 31.9 +2.5 37.0 30th 14.0 +0.9 6.5 21st 0 10.7 lowest 0%
Yuendumu 32.3 +2.6 37.1 30th     9.7 15th 0 8.2 lowest 0%
Yulara Airport 30.8 +2.0 37.1 30th 11.6 +0.9 6.3 1st 0 7.7 lowest 0%

Notes

A Monthly Climate Summary is prepared to list the main features of the weather in Northern Territory 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.

A Climate Summary is generally published on the first working day of each month.

This statement has been prepared based on information available at 11 am 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.

Averages for individual sites are long-term means based on observations from all available years of record, which vary widely from site to site. They are not shown for sites with less than 10 years of record, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of long-term average rain.

The Rank indicates how rainfall this time compares with the climate record for the site, based on the decile ranking (very low rainfall is in decile 1, low in decile 2 or 3, average in decile 4 to 7, high in decile 8 or 9 and very high is in decile 10).
The Fraction of average shows how much rain has fallen this time as a percentage of the long-term mean.

The ACORN-SAT dataset is used for temperature area averages.

Further information

Media
(03) 9669 4057
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