Northern Territory in July 2017: Warmest July on record

The daytime and overall mean temperature was the highest ever recorded for July in the Northern Territory. Overnight temperatures were also well above average, but not a record. The total rainfall was slightly more than twice the long-term average.

Record heat across the Territory

Above average rain

  • Rainfall was average to above average across most parts of the Northern Territory
  • July was much wetter than average around Milingimbi in the far northeast, and in a wide band across the central NT
  • The most significant rainfall was recorded across central parts of the NT on the 9th and 10th as a deep trough and associated cloudband affected the region
  • Some sites had their highest July daily rainfall on record, highest total July rainfall on record or highest July rainfall in the last 30 years
  • During this rain event Lajamanu experienced a severe thunderstorm that produced a wind gust of 91 km/h; the site also recorded 9.8 mm of rain in a 10-minute period
  • Reports of hail and vegetation damage due to storms in the Tanami District were received and subsequent analysis of the storm indicated the presence of supercell thunderstorms on the 9th
  • Further information

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    Extremes in July 2017
    Hottest day 35.8 °C at Bradshaw on the 6th
    Warmest days on average 34.1 °C at Bradshaw
    34.1 °C at Middle Point
    34.1 °C at Noonamah Airstrip
    Coolest days on average 23.4 °C at Yulara Airport
    Coldest day 13.5 °C at Arltunga on the 10th
    Coldest night -3.5 °C at Yulara Airport on the 7th
    Coolest nights on average 3.3 °C at Kulgera
    Warmest nights on average 24.6 °C at McCluer Island
    Warmest night 25.7 °C at McCluer Island on the 5th
    Warmest on average overall 27.5 °C at Cape Wessel
    27.5 °C at Jabiru Airport
    Coolest on average overall 13.6 °C at Curtin Springs
    Wettest overall 95.4 mm at Kurundi
    Wettest day 54.0 mm at Kurundi on the 10th
    Strongest wind gust 91 km/h at Lajamanu Airport on the 9th

    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 July daily rainfall
    New record
    (mm)
    Old
    record
    Years of
    record
    Kurundi 54.0 on the 10th 36.8 on the 1st in 1939 62



    Record highest July total rainfall
    New record
    (mm)
    Old
    record
    Years of
    record
    Average for
    July
    Kurundi 95.4 80.3 in 1939 63 6.9
    Warramunga 68.8 43.2 in 2010 46 5.0

    Highest July total rainfall for at least 20 years
    Observed
    (mm)
    Most recent
    higher
    Average for
    July
    Riveren 18.0 59.0 in 1978 1.9
    Lajamanu Airport 24.6 64.1 in 1968* 4.4
    Soudan 20.0 129.1 in 1986* 7.7

    * note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported




    Record highest July temperature
    New record
    (°C)
    Old
    record
    Years of
    record
    Average for
    July
    Warruwi Airport 32.9 on the 19th = 32.9 on the 4th in 1970 52 28.7
    Black Point 33.2 on the 19th 33.0 on the 29th in 2010 26 29.7



    Record highest July mean daily maximum temperature
    New record
    (°C)
    Old
    record
    Years of
    record
    Average for
    July
    Darwin Airport 32.6 = 32.6 in 2010 76 30.6
    Alice Springs Airport 23.9 22.9 in 2000 75 19.7
    Brunette Downs 30.0 29.3 in 1958 53 26.7
    Curtin Springs 23.6 23.2 in 2002 52 20.2
    Tennant Creek Airport 26.9 = 26.9 in 1975 48 24.6
    Daly Waters Airstrip 32.8 31.1 in 1958 47 29.0
    Centre Island 28.6 27.7 in 1993 42 26.3
    Wave Hill 31.1 30.7 in 1975 42 28.4
    Jabiru Airport 33.8 33.4 in 2010 39 31.9
    McArthur River Mine Airport 33.0 32.8 in 1993 39 30.1
    Gove Airport 29.6 29.1 in 1998 37 27.8
    Kulgera 23.5 21.9 in 2002 36 19.0
    Elliott 30.5 30.2 in 2005 35 28.3
    Pirlangimpi Airport 32.8 = 32.8 in 2010 34 31.2
    Yulara Airport 23.4 22.8 in 1985 30 20.4
    Tindal RAAF 33.0 31.7 in 1995 29 30.2
    Black Point 31.1 = 31.1 in 2010 25 29.7
    Douglas River Research Farm 33.7 33.5 in 1998 25 31.8
    Territory Grape Farm 25.1 24.7 in 1993 24 22.6
    Borroloola Airport 32.8 31.3 in 1998 23 30.2
    Lajamanu Airport 29.8 28.7 in 2013 22 26.9
    Batchelor Airport 33.6 33.4 in 2003 20 31.9
    Delamere Weapons Range 31.9 31.2 in 1998 20 29.5
    Rabbit Flat 29.3 27.8 in 2000 20 26.1

    Highest July mean daily maximum temperature for at least 20 years
    Observed
    (°C)
    Most recent
    higher
    Average for
    July
    Victoria River Downs 32.5 33.0 in 1975 29.3



    Record highest July daily minimum temperature
    New record
    (°C)
    Old
    record
    Years of
    record
    Average for
    July
    Victoria River Downs 24.2 on the 7th 23.4 on the 31st in 2010 51 10.9



    Record highest July mean daily minimum temperature
    New record
    (°C)
    Old
    record
    Years of
    record
    Average for
    July
    Tennant Creek Airport 14.4 = 14.4 in 1998 48 12.3
    Centre Island 21.4 20.9 in 2010 42 18.6



    Record highest July mean temperature
    New record
    (°C)
    Old
    record
    Years of
    record
    Average for
    July
    Tennant Creek Airport 20.7 = 20.7 in 1975 48 18.4
    Centre Island 25.0 24.1 in 2010 42 22.4
    Tindal RAAF 24.6 = 24.6 in 2010 29 21.9
    Territory Grape Farm 15.7 15.5 in 2000 24 13.9
    Borroloola Airport 24.2 23.8 in 1998 23 21.0
    Lajamanu Airport 20.8 20.5 in 2005 22 18.0
    Rabbit Flat 18.9 18.5 in 2005 20 16.5

    Highest July mean temperature for at least 20 years
    Observed
    (°C)
    Most recent
    higher
    Average for
    July
    Alice Springs Airport 14.3 15.1 in 1996 11.9
    Yulara Airport 13.8 14.4 in 1996 12.4



    Summary statistics for July 2017
    Maximum temperatures
    (°C)
    Minimum temperatures
    (°C)
    Rainfall
    (millimetres)
    Mean for
    July
    2017
    Diff
    from
    average
    Highest for
    July
    2017
    Mean for
    July
    2017
    Diff
    from
    average
    Lowest for
    July
    2017
    Total for
    July
    2017
    Average
    for
    July
    Rank of
    July
    2017
    Fraction of
    July
    average
    Darwin-Daly (district 14GA)
    Batchelor Airport 33.6 +1.7 34.9 25th 18.9 +2.6 13.8 22nd 0 0.8 lowest 0%
    Black Point 31.1 +1.4 33.2 19th 23.0 +2.2 20.4 22nd 0.8 4.5 high 18%
    Bradshaw 34.1 +2.2 35.8 6th 17.9 +2.7 11.8 22nd 0 0.3 v low 0%
    Central Arnhem Plateau 30.5 +1.7 32.2 5th 17.6 +1.9 14.6 14th 0 2.6 v low 0%
    Channel Point 30.5 +1.3 33.7 13th 19.2 +2.1 16.1 22nd 0 0.1 lowest 0%
    Croker Island Airport 30.9   33.4 19th 22.4   19.8 19th 3.0
    Darwin Airport 32.6 +2.0 34.2 23rd 21.1 +1.8 18.5 15th 0 1.1 lowest 0%
    Delamere Weapons Range 31.9 +2.4 34.0 6th 17.1 +2.4 13.0 21st 0 0.5 lowest 0%
    Douglas River Research Farm 33.7 +1.9 35.5 4th 16.1 +3.3 9.3 22nd 0 2.5 lowest 0%
    Dum In Mirrie Airstrip 32.2 +2.0 34.2 24th 20.2 +2.0 16.3 22nd 0 1.0 lowest 0%
    Jabiru Airport 33.8 +1.9 34.8 25th 21.3 +2.7 18.0 22nd 0 3.2 lowest 0%
    Katherine Country Club 32.9   35.2 4th 15.9   10.4 22nd 0
    McCluer Island 28.4 +1.2 30.8 19th 24.6 +1.7 23.3 1st 0.2 1.3 average 15%
    Middle Point 34.1 +1.4 35.3 23rd 17.0 +2.6 11.7 21st 0 0.4 v low 0%
    Murganella Airstrip 31.9   34.4 19th 18.8   14.4 21st 3.0
    Noonamah Airstrip 34.1   35.4 24th 18.2   12.7 22nd 0
    Oenpelli Airport 33.9   35.1 19th 20.3   15.8 22nd 0
    Pirlangimpi Airport 32.8 +1.6 35.0 19th 20.7 +2.3 16.8 22nd 0.2 2.7 average 7%
    Point Fawcett 32.1 +2.1 33.6 19th 18.7 +0.4 15.6 22nd 0.6 0.2 high 300%
    Port Keats Airport 33.0 +1.6 35.1 13th 19.4 +2.8 15.1 22nd 0.2 1.2 average 17%
    Tindal RAAF 33.0 +2.8 34.7 4th 16.2 +2.6 10.5 21st 0 2.6 lowest 0%
    Arnhem (district 14BC)
    Cape Wessel 30.6   31.6 9th 24.4   22.9 1st 30.8 17.2 high 179%
    Gove Airport 29.6 +1.8 30.7 18th 21.7 +1.5 18.6 30th 8.4 18.4 average 46%
    Groote Eylandt Airport 30.5 +1.7 31.8 24th 18.4 +2.9 14.8 22nd 0 3.1 v low 0%
    Maningrida Airport 31.7 +1.0 33.7 18th 20.0 +1.6 17.2 15th 1.4 1.1 high 127%
    Milingimbi Airport 31.4 +1.0 33.0 11th 21.2 +1.9 18.7 21st 11.0 3.5 high 314%
    Ngayawili 30.7 +1.2 32.5 18th 21.2 +1.6 18.8 27th 1.0 3.9 average 26%
    Warruwi Airport 29.9 +1.2 32.9 19th 23.2 +2.0 21.7 1st 3.2 1.8 v high 178%
    Roper-Mcarthur (district 14DE)
    Borroloola Airport 32.8 +2.6 34.2 25th 15.5 +3.6 11.0 21st 0 0.5 lowest 0%
    Bulman 32.5 +1.7 34.1 25th 17.2 +3.4 11.5 21st 1.0 1.3 high 77%
    Centre Island 28.6 +2.3 30.5 18th 21.4 +2.8 19.4 21st 1.2 1.8 average 67%
    Daly Waters Airstrip 32.8 +3.8 34.7 4th 11.9 -0.1 6.4 21st 0 1.8 lowest 0%
    McArthur River Mine Airport 33.0 +2.9 35.1 25th 15.9 +3.7 10.6 21st 0 2.2 lowest 0%
    Ngukurr Airport 33.0   35.2 13th 17.2   10.8 21st 0
    Victoria (district 14F)
    Lajamanu Airport 29.8 +2.9 32.8 30th 11.7 +2.5 5.7 21st 24.6 4.4 v high 559%
    Victoria River Downs 32.5 +3.2 35.3 6th 13.6 +2.7 7.1 22nd 0 2.8 lowest 0%
    Wave Hill 31.1 +2.7 33.5 6th 14.3 +3.5 8.5 21st 6.0 5.3 high 113%
    Barkly (district 15A)
    Brunette Downs 30.0 +3.3 33.5 6th 13.1 +2.5 7.0 20th 0 4.3 lowest 0%
    Elliott 30.5 +2.2 34.3 6th 13.8 +2.5 6.7 21st 0 3.0 lowest 0%
    Tennant Creek Airport 26.9 +2.3 32.2 5th 14.4 +2.1 8.5 21st 25.6 5.4 v high 474%
    Alice Springs (district 15B)
    Alice Springs Airport 23.9 +4.2 29.2 29th 4.7 +0.7 -2.6 1st 0.8 15.1 average 5%
    Arltunga 23.8 +4.1 28.3 30th 3.9 +0.5 -2.9 20th 5.2 10.2 average 51%
    Curtin Springs 23.6 +3.4 30.0 29th 3.7 -0.1 -3.2 7th 2.0 12.6 average 16%
    Jervois 24.4 +2.5 31.2 30th 7.5 +2.2 1.4 1st 53.6 14.1 v high 380%
    Kulgera 23.5 +4.5 30.0 29th 3.3 -1.6 -0.5 31st 13.5 12.1 high 112%
    Rabbit Flat 29.3 +3.2 33.7 30th 8.7 +1.9 4.1 24th 0 5.2 lowest 0%
    Territory Grape Farm 25.1 +2.5 30.4 30th 6.4 +1.2 1.3 1st 21.2 5.4 v high 393%
    Walungurru Airport 26.2 +2.8 30.5 29th 10.9 +0.5 6.2 7th 0 13.7 v low 0%
    Yulara Airport 23.4 +3.0 30.4 29th 4.2 -0.3 -3.5 7th 10.6 18.2 average 58%

    Notes

    The Monthly climate summary, generally published on the first working day of each month, lists 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. More extensive discussion of significant weather events, along with later information and data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

    This statement has been prepared based on information available at 1 pm on Tuesday 1 August 2017. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

    In some situations, some or all of the rainfall is in the form of hail or snow. In these cases the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.

    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.

    Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

    Further information

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