Wednesday, 4 August 2010 - Monthly Climate Summary for Northern Territory - Product code IDCKGC22R0
Northern Territory in July 2010: A Dry of unseasonal extremes
Unseasonal rain across most of the Northern Territory brought a wet break to the Dry, with some places in central and southern districts getting their wettest July in 24 years. Maximum temperatures were very much above average in the northern districts while minimum temperatures were mostly above to very much above average across all the Territory.
- Darwin sweltered through its hottest July on record.
- Alice Springs shivered through its second coldest day on record.
July was notable for unseasonal rain across central, southern and northeastern districts. A near-constant moist, easterly flow over the Top End brought 31.6 mm of rain to Nhulunbuy making it the wettest July since 2001. During the first week, moisture streaming across the interior from the Indian Ocean brought the combined June and July average rainfall in 3 days. Tennant Creek with 37 mm, received July rainfall for the first time in four years. Alice Springs had its second wettest July on record after receiving 100.6 mm for the month while Vaughan Springs had its wettest July in 50 years after 130 mm were dumped in only 5 days. Some other sites also had their highest total July rainfall on record.
The wettest overall was 183.9 mm at Yuendumu, followed by 136.0 mm at Anzac Oval.
The wettest single day was 59.0 mm at Vaughan Springs, followed by 57.8 mm at Jervois and 53.8 mm at Yuendumu all on the 6th. Some sites had their highest July daily rainfall on record.
On average, the Northern Territory experienced above average minimum temperatures across all districts, with maximum temperatures warmer than average in the north and below average in the south.
Over the northern districts, maximum temperatures were above average to very much above average with some areas registering their highest maximum temperature on record in near constant humid, easterly winds. Overall, Darwin experienced its warmest July on record with an average maximum temperature of 32.6 °C. The July average maximum temperature for Darwin was warmer than the previous June, May or April. On the other hand, cloud cover and rain kept maximum temperatures below 10 degrees across most of the Alice Springs district on the 6th. Alice Springs itself, struggled to reach 7 °C, making it the coldest July day on record.
The hottest day was 37.5 °C at Bradshaw and Timber Creek, both on the 30th, followed by 37.0 °C at Mango Farm on the 31st. Some sites had their highest July temperature on record.
The warmest days on average were 34.5 °C at Noonamah, followed by 33.8 °C at Middle Point and by 33.4 °C at Jabiru Airport. Some sites had their highest July mean daily maximum temperature on record.
The coolest days on average were 17.4 °C at Kulgera, followed by 17.5 °C at Arltung and by 17.7 °C at Alice Springs Airport. Some sites had their lowest July mean daily maximum temperature on record.
The coldest day was 6.7 °C at Arltunga, 7.0 °C at Alice Springs Airport and 7.4 °C at Jervois all on the 6th. Some sites had their coldest July day (lowest maximum temperature) on record.
Cloud cover and moist, easterly winds kept minimum temperatures across most of the Territory above average to very much above average. Many locations in the Roper-McArthur and northwestern Darwin-Daly districts had their warmest July mean daily minimum on record. Darwin had 3 nights in a row over 25 °C late in the month and although temperatures have reached 25 °C in July before, it has never done so for more than one day in a row. The longest streak of July nights over 24 °C in Darwin happened in 1986 with 3 nights in a row.
The coldest night was -2.0 °C at Yulara Aero on the 3rd, followed by -1.7 °C at Kulgera and -1.6 °C at Yulara Aero, both on the 2nd.
The coolest nights on average were 5.7 °C at Kulgera, followed by 6.3 °C at Yulara Aero and 6.5 °C at Curtin Springs.
The warmest nights on average were 24.9 °C at Cape Don, followed by 23.6 °C at Warruwi. Some sites had their highest July mean daily minimum temperature on record.
The warmest night was 26.9 °C at Cape Don on the 26th. Some sites had their warmest July night (highest daily minimum temperature) on record.
A strong high pressure system over southern Australia maintained a strong pressure gradient across the Northern Territory over the last week in July. The strongest wind gust registered in the Northern Territory was 72 km/h at Yulara Aero on the 29th, followed by 61 km/h at Centre Island on the 15th and 61 km/h at Darwin Airport on the 25th.
|Extremes in July 2010|
37.5 °C at Bradshaw on the 30th|
37.5 °C at Timber Creek on the 30th
|Warmest days on average||34.5 °C at Noonamah|
|Coolest days on average||17.4 °C at Kulgera|
|Coldest day||6.7 °C at Arltunga on the 6th|
|Coldest night||-2.0 °C at Yulara Aero on the 3rd|
|Coolest nights on average||5.7 °C at Kulgera|
|Warmest nights on average||24.9 °C at Cape Don|
|Warmest night||26.9 °C at Cape Don on the 26th|
|Wettest overall||183.9 mm at Yuendumu|
|Wettest day||59.0 mm at Vaughan Springs on the 6th|
|Highest wind gust||72 km/h at Yulara Aero on the 29th|
|Record highest July daily rainfall|
|Highest daily rainfall (mm)||Previous highest (mm)||Years of
|Arltunga||32.7||on the 6th||29.7||on the 2nd in 1939||66|
|Vaughan Springs||59.0||on the 6th||36.6||on the 8th in 1978||49|
|Warramunga||30.0||on the 7th||26.4||on the 1st in 1986||39|
|Gorrie||1.6||on the 6th||0.6||on the 3rd in 1999||24|
|Gemtree Park||37.2||on the 6th||28.8||on the 8th in 2005||20|
|Shoal Bay||2.0||on the 7th||0.0||on the 31st in 2009||12|
|Batchelor Aero||2.4||on the 6th||0.2||on the 18th in 2001||15|
|Dum In Mirrie||0.2||on the 7th||0.0||on the 31st in 2009||15|
|Walker Creek||1.4||on the 6th||0.0||on the 31st in 2008||16|
|Rabbit Flat||23.4||on the 6th||18.6||on the 3rd in 1998||13|
|Tilmouth Well||49.6||on the 6th||43.2||on the 8th in 2005||12|
|Bradshaw||2.0||on the 6th||0.4||on the 22nd in 2004||11|
|Pine Creek Council||1.2||on the 7th||0.8||on the 12th in 2006||11|
|Port Keats Aero||4.2||on the 6th||0.2||on the 27th in 2002||10|
|Record highest total July rainfall|
|Total rainfall (mm)||Previous highest (mm)||Years of
|The Garden||122.2||120.5||in 1955||56||13.8|
|Vaughan Springs||130.0||77.4||in 1978||50||7.4|
|Alyangula Police||25.8||25.6||in 1985||31||2.9|
|Palm Valley||92.4||88.4||in 1986||29||13.6|
|Wallace Rock Hole||99.6||49.2||in 1986||25||12.6|
|Gemtree Park||94.8||30.6||in 2005||20||6.8|
|Shoal Bay||2.0||0.0||in 2006||12||0.0|
|Walker Creek||1.4||0.0||in 2005||16||0.0|
|Batchelor Aero||2.6||0.2||in 2001||14||0.0|
|Rabbit Flat||39.8||20.2||in 1998||13||3.7|
|Record highest July temperature|
|Highest temperature (°C)||Previous highest (°C)||Years of
|Victoria River Downs||36.5||on the 30th||35.8||on the 15th in 1995||42||29.2|
|Daly Waters||35.8||on the 30th||34.7||on the 14th in 2005||40||28.8|
|Gove Airport||31.0||on the 31st||30.9||on the 27th in 1998||30||27.7|
|Mango Farm||37.0||on the 31st||36.4||on the 16th in 1995||30||31.5|
|Timber Creek||37.5||on the 30th||37.3||on the 16th in 1995||29||30.5|
|Black Point||33.0||on the 29th||32.6||on the 1st in 1991||17||29.6|
|Lajamanu||34.7||on the 30th||33.0||on the 13th in 2005||15||26.6|
|Kidman Springs||36.8||on the 30th||36.5||on the 20th in 1996||14||30.4|
|Delamere Weapons Range||35.5||on the 30th||35.0||on the 14th in 2005||13||29.5|
|Record lowest July daily maximum temperature|
Lowest daily maximum
|Previous lowest (°C)||Years of
|Alice Springs Airport||7.0||on the 6th||7.6||on the 15th in 1948||68||19.6|
|Urandangi||10.2||on the 6th||12.0||on the 13th in 1984||52||24.0|
|Jervois||7.4||on the 6th||10.0||on the 14th in 1984||41||21.9|
|Tennant Creek Airport||10.7||on the 7th||11.9||on the 14th in 1984||40||24.5|
|Wave Hill||15.7||on the 6th||18.4||on the 2nd in 1999||36||28.4|
|Ali Curung||10.5||on the 6th||13.4||on the 2nd in 1998||21||24.5|
|Territory Grape Farm||11.4||on the 7th||15.0||on the 19th in 2004||14||22.6|
|Rabbit Flat||13.8||on the 6th||15.0||on the 2nd in 1998||13||26.1|
|Record highest July mean daily maximum temperature|
Mean daily maximum
|Previous highest (°C)||Years of
|Darwin Airport||32.6||32.4||in 1998||69||30.5|
|Jabiru Airport||33.4||33.2||in 2005||30||31.8|
|Pirlangimpi||32.8||= 32.8||in 1998||26||31.0|
|Black Point||31.1||30.6||in 2003||17||29.6|
|Channel Point||30.6||30.4||in 1998||13||29.0|
|Record lowest July mean daily maximum temperature|
Mean daily maximum
|Previous lowest (°C)||Years of
|Ali Curung||22.3||= 22.3||in 1997||21||24.5|
|Record highest July daily minimum temperature|
Highest daily minimum
|Previous highest (°C)||Years of
|Darwin Airport||26.6||on the 26th||25.1||on the 9th in 1978||69||19.3|
|Oenpelli||25.6||on the 26th||24.9||on the 10th in 1988||44||18.3|
|Victoria River Downs||23.4||on the 31st||= 23.4||on the 3rd in 1969||42||10.9|
|Warruwi||25.8||on the 26th||25.3||on the 6th in 1966||37||21.1|
|Centre Island||23.4||on the 31st||22.7||on the 2nd in 1996||34||18.5|
|Jabiru Airport||25.9||on the 5th||25.5||on the 25th in 1974||31||18.4|
|McArthur River Mine||23.2||on the 5th||22.5||on the 12th in 1990||28||12.1|
|Alyangula Police||24.9||on the 27th||24.5||on the 7th in 1996||27||17.8|
|Pirlangimpi||25.3||on the 27th||23.8||on the 30th in 2003||26||18.1|
|Wollogorang||24.4||on the 27th||22.5||on the 12th in 1990||26||11.6|
|Douglas River||21.8||on the 6th||21.5||on the 23rd in 2005||18||12.4|
|Black Point||25.8||on the 25th||25.0||on the 23rd in 1998||17||20.7|
|Borroloola||22.4||on the 5th||21.5||on the 18th in 1998||15||12.1|
|Batchelor Aero||24.6||on the 24th||23.3||on the 20th in 2003||12||16.0|
|Rabbit Flat||20.0||on the 30th||19.6||on the 7th in 2005||13||6.7|
|Record highest July mean daily minimum temperature|
Mean daily minimum
|Previous highest (°C)||Years of
|Darwin Airport||22.3||21.7||in 1981||69||19.3|
|Victoria River Downs||16.3||16.2||in 1998||42||10.9|
|Centre Island||20.9||19.9||in 1998||34||18.5|
|Jabiru Airport||22.8||20.7||in 1986||31||18.4|
|McArthur River Mine||17.5||16.3||in 1981||28||12.1|
|Gove Airport||22.7||= 22.7||in 1998||30||20.2|
|Mango Farm||19.1||18.7||in 1998||30||15.0|
|Timber Creek||18.6||18.2||in 1998||29||14.9|
|Alyangula Police||21.1||19.4||in 1986||27||17.8|
|Katherine Aviation Museum||17.8||17.6||in 1998||25||12.9|
|Ali Curung||10.3||9.8||in 1998||21||7.4|
|Tindal RAAF||17.6||= 17.6||in 1986||22||13.7|
|Douglas River||17.6||17.2||in 1998||18||12.4|
|Black Point||23.4||22.6||in 1998||17||20.7|
|Territory Grape Farm||8.5||7.4||in 2005||13||5.0|
|Channel Point||20.5||= 20.5||in 1998||13||17.1|
|Batchelor Aero||20.7||17.7||in 2005||12||16.0|
|Delamere Weapons Range||18.6||17.9||in 1998||13||14.5|
|Rabbit Flat||11.8||11.0||in 1998||13||6.7|
|Summary statistics for July 2010|
|Darwin-Daly (district 14GA)|
|Central Arnhem Plateau||29.9||32.5||30th||19.0||15.6||7th||2.6|
|Delamere Weapons Range||31.0||+1.5||35.5||30th||18.6||+4.1||13.4||8th||0||0.6||lowest||0%|
|Douglas River||32.6||+0.9||36.2||31st||17.6||+5.2||13.7||18th||3.6||3.1||v high||116%|
|Dum In Mirrie||32.2||34.9||26th||21.7||17.9||22nd||0.2||0||highest|
|Katherine Aviation Museum||31.2||+0.7||34.8||30th||17.8||+4.9||12.8||22nd||0||1.3||lowest||0%|
|Mango Farm||33.1||+1.6||37.0||31st||19.1||+4.1||15.1||18th||2.6||2.5||v high||104%|
|Pine Creek Council||31.6||35.0||31st||19.8||16.6||21st||1.2|
|Point Fawcett||30.5||32.1||28th||20.8||17.3||12th||1.6||0.2||v high||800%|
|Port Keats Aero||31.7||34.8||28th||20.6||18.1||17th||4.4|
|Arnhem (district 14BC)|
|Groote Eylandt Airport||29.8||32.5||29th||20.5||15.8||10th||18.6|
|Roper-Mcarthur (district 14DE)|
|Daly Waters AWS||30.5||+1.7||35.8||30th||15.4||+3.2||10.9||18th||3.2||2.0||v high||160%|
|McArthur River Mine||31.5||+1.6||35.0||29th||17.5||+5.4||12.2||21st||0||2.8||lowest||0%|
|Victoria (district 14F)|
|Kidman Springs||30.9||+0.5||36.8||30th||16.8||+4.3||11.5||22nd||13.0||2.8||v high||464%|
|Timber Creek||31.5||+1.0||37.5||30th||18.6||+3.7||14.3||17th||10.4||2.0||v high||520%|
|Victoria River Downs||30.2||+1.0||36.5||30th||16.3||+5.4||9.7||22nd||25.2||2.9||v high||869%|
|Wave Hill||28.3||-0.1||35.0||30th||14.8||+4.1||8.5||22nd||18.5||4.7||v high||394%|
|Barkly (district 15A)|
|Tennant Creek Airport||24.0||-0.5||33.7||30th||13.4||+1.2||8.2||7th||37.8||4.7||v high||804%|
|Alice Springs (district 15B)|
|Alice Springs Airport||17.7||-1.9||29.6||29th||6.6||+2.6||0.9||3rd||100.6||14.7||v high||684%|
|Territory Grape Farm||20.8||-1.8||29.0||29th||8.5||+3.5||1.9||16th||19.2||4.9||v high||392%|
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.
This statement has been prepared based on information available at 9 am on Wednesday 4 August 2010. 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 2006.
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.