Monday, 2 November 2009 - Monthly Climate Summary for Northern Territory - Product code IDCKGC12R0
October days were warmer than usual in the Darwin-Daly District this year, but close to average elsewhere. Minimums were mostly cooler than normal, and it was also drier, most notably in the Darwin-Daly District.
Maximum temperatures were unusually warm in Darwin this October, with Darwin recording it's warmest month on record.The average maximum temperature was 34.8°C at Darwin Airport, which is 1.6°C greater than the long-term mean, and the highest mean maximum temperature recorded in any month for Darwin. The daily maximum temperature during the month reached 35.0°C on 13 days, the highest on record for any month, and there were another 4 days with 34.9°C. The 38.0°C recorded on the 18th was the second highest daily maximum temperature on record at Darwin Airport, while the 37.8°C the previous day ranks equal third. In contrast, minimums were just below average. Darwin was drier than normal for October, with the monthly total rainfall of 33.4 mm just less than half the long-term October average of 69.2 mm.
Alice Springs was also drier than normal for October, with zero rainfall recorded (the long-term October average for Alice is 21.4 mm). Maximum temperatures were close to normal, with an average of 30.9°C. Minimum temperatures were cooler than normal, with an average minimum of 13.1°C being 1.7°C lower than the long-term average for October.
The Territory was generally drier than normal for the first month of this wet season, most notably in the Darwin-Daly District. A handful of stations recorded rainfall values in the lowest decile for October. Some areas were close to the long-term average, while in contrast the northwest of the Tiwi Islands was wetter than normal.
The area-averaged rainfall over the whole of the Territory was 2.8 mm which is 16.3 mm less than the long-term average of 19.1 mm.
The wettest overall was 82.2 mm at Pirlangimpi AWS, followed by 64.8 mm at Karama, and 64.0 mm at Adelaide River Post Office.
The wettest single day 62.0 mm at Edith Farms Road on the 21st, followed by 53.2 mm at Point Fawcett AWS on the 21st, and 53.0 mm at Adelaide River Post Office on the 5th.
One site had their lowest total October rainfall on record.
Maximum temperatures were mixed across the Territory in October. Most of the Darwin-Daly District saw maximum temperatures of up to 2°C greater than climatology. In contrast, the Barkly District and the eastern half the Alice Springs District saw maximums a little below the long-term mean.
The area-averaged maximum temperature was 34.6°C, which was 0.1°C warmer than the long-term October average of 34.5°C.
The hottest day was 42.4°C at Walungurru AWS on the 31st, followed by 41.9°C at Kidman Springs on the 15th, and 41.8°C again at Kidman Springs on the 28th.
The warmest days on average were 39.1°C at Bradshaw AWS, followed by 39.0°C at Douglas River, and 38.8°C at Kidman Springs.
The coolest days on average were 30.0°C at Kulgera, followed by 30.9°C at Alice Springs Airport.
The coldest day was 20.9°C at Kulgera on the 2nd, followed by 21.0°C at Curtin Springs on the 1st, and 21.7°C at Yulara Aero AWS on the 2nd.
Some sites had their highest October temperature on record.
Some sites had their highest October mean daily maximum temperature on record.
Minimum temperatures were cooler than usual across most of the Territory this October, with several stations recording minimums up to 2°C below the long-term average, and some areas in the east experiencing minimums of 2°C to 3°C cooler than climatology.
The area-averaged minimum temperature was 18.9°C, which was 1.2°C lower than the long-term average of 20.1°C.
The coldest night was 5.7°C at Watarrka on the 2nd, followed by 6.3°C at Alice Springs Airport on the 18th, and 6.6°C at Yulara Aero AWS on the 3rd.
The coolest nights on average were 13.1°C at Alice Springs Airport, followed by 13.8°C at Territory Grape Farm AWS, and 14.2°C at Curtin Springs.
The warmest nights on average were 25.8°C at Cape Don AWS, followed by 25.4°C at both Dum In Mirrie AWS and Warruwi.
The warmest night was 29.5°C at Bradshaw AWS on the 4th, followed by 28.4°C at Dum In Mirrie AWS on the 27th, and 28.2°C at both Wave Hill on the 16th and Point Fawcett on the 27th.
Some sites had their lowest October temperature on record.
One site had their warmest October night (highest daily minimum temperature) on record.
Some sites had their lowest October mean daily minimum temperature on record.
The strongest wind gust recorded was 85 km/h at Alice Springs Airport on the 1st, followed by 74 km/h at both Territory Grape Farm AWS on the 1st and Jervois on the 25th, and 72 km/h was recorded at Centre Island on the 16th.
42.4°C at Walungurru AWS on the 31st
|Warmest days on average
Highest mean daily maximum temperature
|39.1°C at Bradshaw AWS|
|Coolest days on average|
Lowest mean daily maximum temperature
30.0°C at Kulgera
Lowest daily maximum temperature
20.9°C at Kulgera on the 2nd
5.7°C at Watarrka on the 2nd
|Coolest nights on average|
Lowest mean daily minimum temperature
13.1°C at Alice Springs Airport
|Warmest nights on average
Highest mean daily minimum temperature
|25.8°C at Cape Don AWS
Highest daily minimum temperature
29.5°C at Bradshaw AWS on the 4th
Highest total rainfall
82.2 mm at Pirlangimpi AWS
Highest daily rainfall
62.0 mm at Edith Farms Road on the 21st|
|Highest wind gust||
85 km/h at Alice Springs Airport on the 1st|
|Record lowest total October 2009 rainfall|
|Shoal Bay||4.2||5.7||in 2004||12|
|Record highest October 2009 temperature|
|Highest temperature (°C)||
|Black Point||36.1||on the 19th||= 36.1||on the 22nd in 2008||17|
|Dum In Mirrie AWS||38.0||on the 18th||37.7||on the 23rd in 2008||11|
|Point Fawcett AWS||36.3||on the 17th||36.0||on the 28th in 2004||11|
|Record highest October 2009 mean daily maximum temperature|
Mean daily maximum
|Darwin Airport||34.8||34.4||in 2008||67|
|Point Fawcett AWS||33.7||33.6||in 1998||11|
|Record highest October 2009 daily minimum temperature|
Highest daily minimum
|Bradshaw AWS||29.5||on the 4th||28.1||on the 28th in 2004||10|
|Record lowest October 2009 temperature|
|Lowest temperature (°C)||
|Wollogorang||10.7||on the 6th||11.0||on the 19th in 1976||26|
|Borroloola AWS||13.3||on the 6th||13.4||on the 16th in 1996||14|
|Point Fawcett AWS||18.8||on the 19th||= 18.8||on the 4th in 2006||11|
|Groote Eylandt Airport AWS||13.9||on the 7th||14.2||on the 4th in 2004||10|
|Record lowest October 2009 mean daily minimum temperature|
Mean daily minimum
|Wollogorang||17.4||= 17.4||in 2006||26|
|Borroloola AWS||19.3||19.5||in 2006||14|
This table is very wide and may not fit if printed.
|Summary statistics for October 2009|
|Maximum temperatures (°C)||Minimum temperatures (°C)||Rainfall (millimetres)|
|Lowest||Total||Rank||Fraction of average|
|Darwin-Daly (district 14GA)|
|Batchelor Aero AWS||37.4||+0.5||39.2||3rd||23.1||+0.1||17.8||19th||28.8||low||46%|
|Cape Don AWS||32.8||34.3||18th||25.8||24.0||8th||1.0||average||5%|
|Central Arnhem Plateau AWS||35.8||37.6||28th||21.0||12.9||7th||0|
|Delamere Weapons Range AWS||37.7||+0.3||39.6||31st||23.2||−0.7||17.6||8th||0||lowest||0%|
|Dum In Mirrie AWS||33.4||+0.8||38.0||18th||25.4||−0.3||21.0||19th||31.4||average||46%|
|Jabiru Airport AWS||38.7||+1.1||40.2||17th||23.5||−0.4||18.1||8th||0||lowest||0%|
|Katherine Aviation Museum||37.8||+0.1||39.5||27th||22.6||−1.2||14.3||8th||0.6||low||2%|
|McCluer Island AWS||30.8||+0.3||32.8||19th||26.2||+0.2||23.8||19th||6.4||very high||81%|
|Middle Point AWS||38.3||40.2||17th||21.2||16.2||19th||2.6|
|Pine Creek Council||37.2||38.9||16th||23.5||20.4||8th||24.9|
|Point Fawcett AWS||33.7||+0.8||36.3||17th||22.7||−1.3||18.8||19th||55.8||average||103%|
|Port Keats Aero||34.8||38.6||3rd||23.4||16.6||20th||23.8|
|Tindal RAAF AWS||37.9||+0.4||39.4||31st||23.2||−1.1||15.2||19th||1.2||low||3%|
|Arnhem (district 14BC)|
|Groote Eylandt Airport AWS||33.8||−0.4||35.9||16th||19.1||−1.9||13.9||7th||16.8||average||63%|
|Maningrida Aero AWS||33.7||37.3||18th||21.8||17.1||7th||0|
|Roper-Mcarthur (district 14DE)|
|Daly Waters AWS||37.6||+0.3||40.1||25th||19.4||−1.9||10.1||10th||0.4||low||2%|
|McArthur River Mine||37.6||−0.3||40.5||26th||20.5||−0.4||14.5||10th||0||lowest||0%|
|Victoria (district 14F)|
|Victoria River Downs||38.5||+0.7||41.3||14th||20.7||−1.7||12.2||10th||14.4||average||80%|
|Barkly (district 15A)|
|Tennant Creek Airport||34.3||−0.4||38.5||31st||20.6||−1.2||16.2||10th||2.6||low||13%|
|Alice Springs (district 15B)|
|Alice Springs Airport||30.9||0.0||38.3||24th||13.1||−1.7||6.3||18th||0||lowest||0%|
|Territory Grape Farm AWS||32.6||−0.7||38.4||25th||13.8||−1.9||8.3||9th||0.6||low||4%|
|Yulara Aero AWS||31.8||−0.4||40.0||31st||14.3||−0.5||6.6||3rd||3.4||low||19%|
This statement has been prepared based on information available at 12 pm on Monday 2 November 2009. Some checks have been made on the data, but it is possible that results will change as new information becomes available.
Averages are long-term means based on observations from
the years 1800 to 2008.
They are not shown for sites with less than 10 years of record in that time, 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
(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.