Northern Territory in April 2015: Hot start to an overall cool month

The month began with record high temperatures around the north coast and Gulf of Carpentaria region. Mid-month a southwesterly surge of cool, dry air replaced the hot air in the north. Alice Springs Airport recorded five nights below 5 °C and on the 27th Darwin Airport experienced its first night of the year below 21 °C. Overall, the mean temperature for the Northern Territory was 25.1 °C, which is 0.4 °C below the long-term average for April.

While no rainfall records were brokern this month, a quarter of the Territory experienced below average rainfall with an areal averaged rainfall total of 7.6 mm, more than 70% less than the Territory-wide mean of 27.9 mm. There were two notable rainfall events during the month: the first was on the 16th when a cloudband traversed the Alice Springs region bringing up to15 mm to some locations across the Red Centre; the second was from a line of thunderstorms that move westward from the Gulf of Carpentaria, and brought heavy rainfall to the Gove Peninsula on the 22nd.

  • Lowest rainfall since 2008
  • Coolest April since 2012

Further information

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Extremes in April 2015
Hottest day 41.5 °C at Borroloola Airport on the 6th
Warmest days on average 36.6 °C at Borroloola Airport
Coolest days on average 25.2 °C at Arltunga
Coldest day 17.8 °C at Arltunga on the 20th
Coldest night 1.5 °C at Kulgera on the 30th
Coolest nights on average 11.1 °C at Alice Springs Airport
Warmest nights on average 26.5 °C at McCluer Island
Warmest night 29.1 °C at Centre Island on the 3rd
Warmest on average overall 29.6 °C at Jabiru Airport
29.6 °C at Oenpelli Airport
Coolest on average overall 18.6 °C at Alice Springs Airport
18.6 °C at Arltunga
Wettest overall 186.0 mm at Yirrkala Tropical Gardens
Wettest day 97.0 mm at Yirrkala Tropical Gardens on the 22nd
Strongest wind gust 93 km/h at Douglas River on the 4th

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 April temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Brunette Downs 39.8 on the 2nd 39.1 on the 22nd in 2013 50 33.5
Wave Hill 40.5 on the 5th 39.9 on the 13th in 1990 42 34.3
Centre Island 37.9 on the 6th 36.5 on the 10th in 2014 41 32.0
McArthur River Mine Airport 40.0 on the 6th 39.1 on the 4th in 2009 37 34.7
Wollogorang 40.5 on the 5th 39.5 on the 4th in 1978 32 33.7
Black Point 34.1 on the 10th 34.0 on the 1st in 2014 23 31.6
Borroloola Airport 41.5 on the 6th 38.8 on the 22nd in 2010 21 33.8



Record highest April mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Wollogorang 35.6 35.5 in 1990 31 33.7
Borroloola Airport 36.6 36.4 in 2002 20 33.8

Highest April mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Years since
higher
Average for
April
Gove Airport 31.8 32.0 in 1990 25 30.9



Record highest April daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Centre Island 29.1 on the 3rd 29.0 on the 12th in 2014 41 25.3
McArthur River Mine Airport 27.3 on the 3rd = 27.3 on the 6th in 1986 37 20.7
Wollogorang 27.1 on the 2nd 26.5 on the 2nd in 1988 32 19.7
Borroloola Airport 26.2 on the 3rd 26.1 on the 15th in 1996 21 20.3



Record lowest April temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Kulgera 1.5 on the 30th 2.5 on the 30th in 1986 34 13.9



Summary statistics for April 2015
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
April
2015
Diff
from
average
Highest for
April
2015
Mean for
April
2015
Diff
from
average
Lowest for
April
2015
Total for
April
2015
Average
for
April
Rank of
April
2015
Fraction of
April
average
Darwin-Daly (district 14GA)
Batchelor Airport 33.7 -0.1 35.0 1st 21.3 -0.4 14.8 30th 31.4 96.2 average 33%
Black Point 32.6 +1.0 34.1 10th 25.6 +0.7 23.4 26th 30.8 107.7 low 29%
Central Arnhem Plateau 32.8   35.7 6th 21.5   14.8 30th 1.4 62.1 v low 2%
Channel Point 32.6 +0.2 34.9 19th 22.7 -0.8 17.5 30th 57.8 111.6 average 52%
Charles Point 32.6   33.6 8th 24.2   21.3 30th 81.8
Darwin Airport 33.2 +0.5 34.5 19th 24.2 +0.2 20.4 30th 20.4 101.1 low 20%
Delamere Weapons Range 33.7 -0.3 37.3 5th 20.5 -0.5 13.6 30th 4.4 18.9 average 23%
Douglas River 35.2 +0.7 37.6 17th 20.2 -0.3 11.4 30th 14.2 50.6 average 28%
Dum In Mirrie Airstrip 33.3 +0.4 35.2 10th 24.3 -0.1 20.4 27th 54.4 95.6 average 57%
Jabiru Airport 35.2 +0.7 37.1 19th 24.0 +0.5 20.0 30th 40.6 87.3 average 47%
Katherine Country Club 34.6   36.8 14th 20.1   11.0 30th 0
Mango Farm 35.0 +0.7 37.1 7th 20.7 -0.9 12.2 30th 21.2 68.4 average 31%
McCluer Island 30.9 +0.1 32.9 6th 26.5 +0.5 23.4 7th 112.0 146.6 average 76%
Middle Point 34.7 +0.6 36.7 6th 21.7 -0.7 12.7 30th 41.8 103.6 average 40%
Murganella Airstrip 34.2   37.5 7th 22.8   17.9 26th 33.4
Noonamah Airstrip 34.5   36.0 19th 23.0   16.2 30th 46.6
Oenpelli Airport 35.4   37.7 19th 23.8   18.5 30th 40.6
Pirlangimpi Airport 34.5 +1.7 37.1 3rd 23.6 +0.5 18.6 30th 70.4 153.7 low 46%
Point Fawcett 33.0 +0.8 34.4 10th 23.1 -0.5 17.6 30th
Point Stuart 32.8   34.9 19th 23.8   17.5 30th 64.4 135.3 average 48%
Port Keats Airport 34.5 +0.2 38.0 29th 22.0 -0.4 16.3 30th 11.4 83.4 low 14%
Tindal RAAF 34.5 +0.6 36.7 14th 19.7 -0.9 11.7 30th 0.6 40.4 average 1%
Arnhem (district 14BC)
Cape Wessel 32.0   33.2 3rd 26.4   24.0 20th 58.2 156.7 average 37%
Gove Airport 31.8 +0.9 33.5 7th 23.1 -0.1 17.9 25th 158.2 226.2 average 70%
Groote Eylandt Airport 32.7 +0.4 35.9 6th 21.4 -0.3 15.7 29th 35.2 154.2 low 23%
Maningrida Airport 33.2 +0.8 34.8 8th 23.2 -0.1 18.6 27th 55.0 130.6 low 42%
Milingimbi Airport 33.1 +0.9 34.9 19th 24.3 +0.5 21.5 26th 61.8 116.1 average 53%
Ngayawili 33.0 +1.3 34.6 9th 24.2 +0.6 19.4 25th 20.4 155.2 v low 13%
Warruwi Airport 31.8 +0.2 33.8 7th 25.2 +0.2 23.5 25th 70.4 117.7 average 60%
Roper-Mcarthur (district 14DE)
Borroloola Airport 36.6 +2.8 41.5 6th 20.2 -0.1 12.7 27th 3.6 70.1 low 5%
Bulman 34.6   38.4 6th 20.5   14.0 30th 15.2 65.5 low 23%
Centre Island 33.1 +1.1 37.9 6th 25.2 -0.1 21.1 28th 41.8 98.0 average 43%
Daly Waters Airstrip 34.9 +1.1 39.2 6th 18.0 -1.7 11.7 29th 0 22.0 lowest 0%
McArthur River Mine Airport 36.1 +1.4 40.0 6th 20.6 -0.1 11.8 28th 0.2 32.4 low 1%
Ngukurr Airport 35.9   39.8 6th 20.6   12.4 30th 2.0
Wollogorang 35.6 +1.9 40.5 5th 18.8 -0.9 10.4 28th 4.5 44.0 average 10%
Victoria (district 14F)
Lajamanu Airport 33.4 -0.1 38.9 5th 17.4 -0.6 11.2 26th 10.8 15.8 average 68%
Victoria River Downs 35.9 +1.4 39.9 4th 18.9 -0.9 9.5 27th 0 22.7 lowest 0%
Wave Hill 34.8 +0.5 40.5 5th 18.9 +0.1 10.5 27th 0 18.8 lowest 0%
Barkly (district 15A)
Brunette Downs 33.4 -0.1 39.8 2nd 18.0 -1.2 11.0 28th 0 15.1 lowest 0%
Elliott 34.0 -0.4 39.7 6th 19.0 -0.6 12.5 26th 0 22.5 lowest 0%
Tennant Creek Airport 31.1 -0.6 37.3 14th 19.2 -1.2 12.7 30th 3.0 17.4 average 17%
Alice Springs (district 15B)
Alice Springs Airport 26.1 -2.1 38.3 15th 11.1 -1.5 1.7 30th 7.4 17.2 average 43%
Arltunga 25.2 -3.6 37.2 15th 11.9 -1.6 6.2 11th 15.4 16.3 high 94%
Curtin Springs 27.5 -1.7 38.6 15th 13.1 -0.4 5.2 30th 1.4 15.6 average 9%
Jervois 27.9 -2.6 37.8 15th 14.0 -0.4 7.9 26th 15.0 17.2 high 87%
Kulgera 26.1 -1.8 37.5 14th 12.5 -1.4 1.5 30th 0 14.4 lowest 0%
Rabbit Flat 32.3 -1.6 39.5 5th 15.2 -1.6 7.6 30th 9.8 23.5 average 42%
Territory Grape Farm 28.2 -2.3 37.1 15th 13.1 -1.5 5.6 29th 18.6 18.0 high 103%
Walungurru Airport 30.4 -2.8 38.4 15th 18.2 -2.5 12.0 26th 0 11.2 v low 0%
Yulara Airport 27.6 -2.3 37.8 15th 13.1 -1.3 4.4 25th 1.2 15.3 average 8%

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 Friday 1 May 2015. 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
Enquiries