Northern Territory in April 2021: very dry ending to the wet season

Apart from a small section of the north-west Top End, the Northern Territory had less than average rainfall in April 2021. Territory-wide, daytime temperatures were above average apart from the far south of the Territory, while night-time temperatures were below-average across most parts.

Very dry month

  • Nearly all of the Northern Territory was drier than average during April; Territory-wide, rainfall was 67% below the long-term average.
  • While monsoonal conditions developed across northern Australia duirng April, the focus remained away from the Territory, predominantly affecting Western Australia; rainfall for the Territory was associated with isolated shower and thunderstorm activity.
  • For the year-to-date, rainfall for the Northern Territory is 4% below the long-term average.

Mild days, cool nights

  • Overall, temperatures did not vary too much from long-term averages during the month; the mean temperature was 0.17 °C below average.
  • Daytime temperatures were near or marginally above average, apart from the far south: overall, the mean maximum temperature was 0.58 °C above the long-term average.
  • The mean minimum temperature was 0.93 °C below the long-term average, with most of the Territory observing temperatures up to 2 °C below average; a small region around the Carpentaria coast saw temperatures between 1 and 2 °C above average.
  • There were several sites with minimum temperature records, including for warmest April night on record, lowest April temperature on record and lowest April mean daily minimum temperature for at least 20 years.
  • For the year-to-date, the mean maximum temperature across the Northern Territory is 0.15 °C above the long-term average, and the mean minimum temperature is 0.13 °C above the long-term average.

Darwin Airport

  • Total rainfall for Darwin Airport was 100.4 mm, which is 99% of the long-term average of 101.7 mm
  • The mean daily maximum temperature for Darwin Airport was 33.0 °C, which is 0.2 °C above the long-term average of 32.8 °C
  • The warmest day was 35.9 °C on the 22nd, and the coolest day was on the 4th when the temperature reached 29.3 °C
  • The mean daily minimum temperature for Darwin Airport was 24.1 °C, which is 0.1 °C above the long-term average of 24.0 °C
  • The coldest morning was 18.9 °C on the 25th (the earliest date with a sub-20 °C temperature since 2017), and the warmest morning was on the 8th when the minimum temperature was 26.4 °C

Alice Springs Airport

  • Alice Springs Airport recorded no rainfall for the month, compared to the long-term average of 16.2 mm
  • The mean daily maximum temperature for Alice Springs Airport was 27.7 °C, which is 0.7 °C below the long-term average of 28.4 °C
  • The warmest day was 33.5 °C on the 9th, and the coolest day was on the 16th when the temperature reached 23.7 °C
  • The mean daily minimum temperature for Alice Springs Airport was 9.5 °C, which is 3.2 °C below the long-term average of 12.7 °C
  • The coldest morning was 3.9 °C on the 19th, and the warmest morning was on the 16th when the minimum temperature was 15.6 °C
  • Rainfall for the year-to-date at Alice Springs Airport is 130.3 mm, which is just below the long-term average of 131.3 mm. For the year-to-date, the mean maximum temperature at Alice Springs Airport is 32.6 °C, which is 0.6 °C below the long-term average, and the mean minimum temperature is 17.5 °C, which is 0.6 °C below the long-term average

Further information

Media
(03) 9669 4057

Extremes in April 2021
Hottest day 39.5 °C at Bradshaw - Angallari Valley (Defence) on the 10th
39.5 °C at Bradshaw on the 11th
Warmest days on average 36.5 °C at Bradshaw
Coolest days on average 27.7 °C at Alice Springs Airport
Coldest day 19.5 °C at Yulara Airport on the 15th
Coldest night 3.9 °C at Alice Springs Airport on the 19th
Coolest nights on average 9.5 °C at Alice Springs Airport
Warmest nights on average 25.8 °C at McCluer Island
Warmest night 29.0 °C at Channel Point on the 9th
Warmest on average overall 29.6 °C at Jabiru Airport
Coolest on average overall 18.6 °C at Alice Springs Airport
Wettest overall 357.2 mm at Cape Wessel
Wettest day 87.6 mm at Cape Wessel on the 2nd
Strongest wind gust 74 km/h at McCluer Island on the 12th

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 daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Channel Point 29.0 on the 9th 28.9 on the 5th in 2010 27 23.5



Record lowest April temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Black Point 20.3 on the 25th 20.6 on the 30th in 2012 29 25.0
Channel Point 15.5 on the 25th 16.5 on the 30th in 2012 27 23.5
Rabbit Flat 6.4 on the 19th 7.0 on the 30th in 2004 25 17.0
Dum In Mirrie Airstrip 16.3 on the 25th 18.0 on the 30th in 2012 23 24.4



Lowest April mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
April
Alice Springs Airport 9.5 8.9 in 2001 12.7
Territory Grape Farm 11.6 11.4 in 2001 14.7



Summary statistics for April 2021
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
April
2021
Diff
from
average
Highest for
April
2021
Mean for
April
2021
Diff
from
average
Lowest for
April
2021
Total for
April
2021
Average
for
April
Rank of
April
2021
Fraction of
April
average
Darwin-Daly (district 14GA)
Batchelor Airport 33.7 -0.1 35.8 22nd 21.7 -0.1 13.2 25th 32.0 86.0 average 37%
Black Point 32.2 +0.4 33.8 7th 24.6 -0.4 20.3 25th 95.8 111.3 average 86%
Central Arnhem Plateau 32.7 +0.2 35.4 11th 21.3 -0.3 15.3 25th 25.0 65.0 average 38%
Channel Point 32.5 0.0 34.7 28th 23.2 -0.3 15.5 25th 15.6 101.4 v low 15%
Charles Point 32.6   34.3 22nd 24.6   21.6 25th 79.4
Croker Island Airport 32.5   34.1 22nd 24.4   21.2 25th 184.8
Darwin Airport 33.0 +0.2 35.9 22nd 24.1 +0.1 18.9 25th 100.4 101.7 average 99%
Delamere Weapons Range 34.5 +0.1 37.5 9th 20.7 -0.5 14.1 14th 0 16.4 lowest 0%
Douglas River Research Farm 35.4 +0.7 37.6 22nd 19.9 -0.7 11.5 25th 2.6 49.2 low 5%
Dum In Mirrie Airstrip 33.0 0.0 34.6 24th 23.9 -0.5 16.3 25th 94.4 98.1 average 96%
Jabiru Airport 35.2 +0.6 37.1 22nd 24.1 +0.5 18.9 25th 40.0 89.4 average 45%
Kangaroo Flats (Defence) 34.8   37.3 10th 22.9   15.9 25th 99.4
McCluer Island 31.0 +0.1 32.9 24th 25.8 -0.4 22.4 12th 205.8 151.0 high 136%
Middle Point 33.7 -0.5 36.2 22nd 22.4 0.0 14.4 25th 71.0 95.9 average 74%
Mount Bundey North (Defence) 34.5   36.4 22nd 22.9   19.3 25th 120.4
Mount Bundey South (Defence) 34.9   36.8 22nd 21.9   13.7 25th 73.4
Murganella Airstrip 33.5   35.8 11th 22.4   14.9 25th 124.8
Noonamah Airstrip 34.4   36.9 22nd 22.7   14.8 25th 71.4
Oenpelli Airport 34.9   37.5 22nd 23.5   17.5 25th 105.2
Pirlangimpi Airport 32.7 -0.2 34.6 23rd 23.1 -0.1 16.2 25th 137.4 157.6 average 87%
Point Fawcett 32.3 -0.1 33.8 30th 23.3 -0.2 18.0 25th 94.0 132.9 average 71%
Point Stuart 33.1   34.4 22nd 23.1   16.4 25th 66.8 123.8 average 54%
Port Keats Airport 34.4 0.0 36.7 22nd 22.2 -0.4 17.0 25th 46.8 80.1 low 58%
Tindal RAAF 34.6 +0.5 37.2 10th 20.0 -0.6 13.9 25th 0.2 36.7 low 1%
Arnhem (district 14BC)
Cape Wessel 32.0   33.5 18th 25.2   22.0 8th 357.2 167.4 v high 213%
Gove Airport 31.5 +0.5 33.2 12th 23.9 +0.6 20.3 7th 126.6 219.7 average 58%
Groote Eylandt Airport 31.9 -0.6 33.6 20th 21.4 -0.5 18.2 14th 131.8 148.6 average 89%
Maningrida Airport 33.0 +0.5 34.8 23rd 23.2 -0.2 18.7 25th 148.4 134.6 average 110%
Milingimbi Airport 33.4 +1.0 34.9 22nd 23.8 -0.2 21.6 25th 46.4 121.4 low 38%
Ngayawili 32.1 +0.2 34.2 22nd 23.5 -0.3 21.1 7th 51.6 148.1 low 35%
Warruwi Airport 32.4 +0.8 34.5 22nd 25.2 +0.1 23.3 12th 42.6 115.2 average 37%
Roper-Mcarthur (district 14DE)
Borroloola Airport 34.8 +0.6 37.3 10th 18.9 -1.4 12.6 24th 22.4 58.1 average 39%
Bulman 34.3 +0.1 36.6 21st 20.9 0.0 15.9 25th 37.8 62.4 average 61%
Centre Island 32.7 +0.5 34.7 11th 25.5 +0.1 23.3 24th 9.8 89.3 low 11%
Daly Waters Airstrip 34.7 +0.7 37.0 9th 18.5 -1.1 11.6 14th 2.8 20.7 average 14%
McArthur River Mine Airport 35.0 +0.1 37.6 7th 20.3 -0.5 14.5 13th 0.6 31.9 low 2%
Ngukurr Airport 34.4   36.8 10th 20.7   13.9 24th 43.6
Victoria (district 14F)
Bradshaw 36.5 +0.3 39.5 11th 21.9 -0.6 14.0 25th 1.6 21.3 average 8%
Bradshaw - Angallari Valley (Defence) 36.3   39.5 10th 21.9   14.0 25th 0
Bradshaw - Koolendong Valley (Defence) 36.0   38.9 11th 18.3   9.2 25th 6.2
Lajamanu Airport 33.3 -0.7 37.2 10th 17.4 -0.9 11.8 19th 0 14.5 lowest 0%
Victoria River Downs 35.5 +0.8 38.5 10th 18.6 -1.3 12.1 25th 0.2 22.4 average 1%
Wave Hill 35.0 +0.5 37.9 10th 17.8 -1.2 12.1 25th 0 16.6 lowest 0%
Barkly (district 15A)
Elliott 34.9 +0.3 38.8 10th 19.7 0.0 13.8 14th 0.4 20.5 average 2%
Tennant Creek Airport 33.2 +1.3 37.6 10th 20.6 +0.1 16.2 13th 0 15.5 lowest 0%
Alice Springs (district 15B)
Alice Springs Airport 27.7 -0.7 33.5 9th 9.5 -3.2 3.9 19th 0 16.2 lowest 0%
Curtin Springs 28.1 -1.2 35.8 9th 12.4 -1.2 7.2 20th 1.2 14.8 average 8%
Jervois 30.4 -0.2 35.7 9th 13.2 -1.3 7.5 13th 0 15.4 lowest 0%
Rabbit Flat 33.6 -0.7 37.8 10th 14.2 -2.8 6.4 19th 0 17.8 lowest 0%
Territory Grape Farm 30.1 -0.8 34.8 14th 11.6 -3.1 7.1 30th 0 15.7 lowest 0%
Walungurru Airport 31.2 -2.2 36.1 9th 19.5 -1.3 16.1 22nd 0 12.2 v low 0%
Watarrka 28.7 -2.2 35.1 9th 14.0 -2.7 5.0 20th 0.4 12.4 average 3%
Yulara Airport 28.7 -1.4 36.0 9th 13.5 -1.1 8.0 20th 2.0 14.3 average 14%

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 10 am on Monday 3 May 2021. 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

Media
(03) 9669 4057

Creative Commons By Attribution logo Unless otherwise noted, all maps, graphs and diagrams in this page are licensed under the Creative Commons Attribution 4.0 International Licence

Climate