Remote Islands and Antarctica in March 2018

Australia's Indian Ocean islands

  • Temperatures close to average on the Cocos (Keeling) Islands
  • Rainfall on the Cocos (Keeling) Islands above average, with several monsoonal bursts
  • Daytime temperatures almost a degree above average at Christmas Island, but overnight temperatures a little below average
  • Rainfall on Christmas Island just a little above the March average, with a number of marked monsoonal bursts
  • Severe tropical cyclone Marcus moved westward toward Christmas Island on the 20th, but remained well to the east before turning south on the 22nd

Australia's Pacific Ocean islands

  • Temperatures about half a degree above average on Lord Howe Island, despite several cool nights at the start the month
  • Rainfall below average on Lord Howe Island, with about about 50 mm (two-thirds of the total) falling in 7 hours between 6 am and 1 pm on the 27th
  • Temperatures more than a degree above average on Norfolk Island
  • Rainfall below average on Norfolk Island

Australia's Antarctic and sub-Antarctic territories

  • Cold weather dominant at all of Australia's Antarctic stations, although some relatively mild weather at the start and end of the month
  • Monthly mean temperatures below average at Mawson, Davis and Casey
  • Overnight minimum temperatures almost three degrees below average at Casey
  • Temperatures between half and one degree above average on Macquarie Island
  • Total precipitation above average on Macquarie Island

Further information

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Summary statistics for March 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Precipitation
(millimetres)
Mean for
March
2018
Diff
from
average
Highest for
March
2018
Mean for
March
2018
Diff
from
average
Lowest for
March
2018
Total for
March
2018
Average
for
March
Rank of
March
2018
Fraction of
March
average
Offshore Islands (district 200)
Christmas Island Aero 29.1 +0.8 29.9 13th 23.1 0.0 21.5 6th 316.6 301.3 average 105%
Cocos Island Airport 30.1 +0.1 31.3 29th 25.1 -0.1 23.4 5th 316.8 235.3 high 135%
Lord Howe Island Aero 25.6 +0.7 27.4 4th 20.7 +0.7 15.6 1st 75.4 128.2 low 59%
Norfolk Island Aero 25.4 +1.1 27.9 16th 20.6 +1.3 18.1 12th 46.2* 102.5 low 45%*
*Precipitation from Norfolk Island is an estimate, due to some missing data
Antarctica and Macquarie Island (district 300)
Casey -5.0 -0.8 1.4 28th -11.9 -2.0 -20.6 9th 5.8 16.7 low 35%
Davis -5.9 -0.2 -0.2 31st -11.5 -0.6 -18.0 11th 2.4 8.8 v low 27%
Macquarie Island 8.6 +0.6 10.7 18th 5.0 +0.3 0.3 17th 134.6 100.6 v high 134%
Mawson -8.1 -0.9 -1.9 24th -14.8 -1.5 -20.7 20th
Note: Precipitation values from Casey and Davis should be used with caution.

Daily maximum temperatures for March 2018
Offshore Islands (200)12345678910111213141516171819202122232425262728293031
Christmas Island Aero28.729.928.729.127.529.028.229.029.128.929.129.629.929.329.729.428.729.228.929.229.029.229.529.228.629.328.828.828.929.029.2
Cocos Island Airport30.330.530.131.030.530.428.629.828.930.430.229.730.630.730.729.630.130.730.430.728.329.728.430.129.929.729.730.131.330.530.2
Lord Howe Island Aero26.625.925.527.425.825.424.224.024.224.425.125.426.625.624.825.825.926.726.926.826.324.323.924.226.126.723.926.326.226.026.0
Norfolk Island Aero26.325.726.626.625.725.324.824.825.424.224.825.223.124.825.727.925.325.924.425.425.324.824.825.425.926.224.126.025.725.3
Antarctica and Macquarie Island (300)12345678910111213141516171819202122232425262728293031
Casey-5.3-3.6-2.6-5.3-6.1-5.4-5.4-11.1-11.8-13.9-12.0-8.1-6.2-2.8-4.4-5.8-7.4-6.2-3.8-2.0-4.0-4.7-4.2-10.3-3.4-1.2-0.71.40.61.2-1.7
Davis-5.0-4.5-3.6-5.6-7.8-6.9-4.9-3.8-3.1-10.3-9.6-12.9-4.0-2.2-2.0-3.8-7.2-8.3-7.3-11.2-9.1-10.5-4.8-1.7-4.4-6.6-2.9-7.6-6.1-4.6-0.2
Macquarie Island10.110.69.18.910.39.18.47.58.68.98.27.77.38.36.17.38.510.78.97.38.88.19.28.98.79.18.18.18.49.38.4
Mawson-6.0-8.5-7.8-9.0-7.3-8.2-11.8-8.8-6.1-4.4-7.5-7.2-11.6-9.8-7.4-6.3-8.4-12.4-11.6-11.5-12.0-10.1-5.3-1.9-5.0-5.0-4.6-8.1-12.9-6.9-7.6
Values are the maximum temperature, usually in the 24 hours from 9 am on the day indicated,
and typically occurred in the afternoon of that day.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 °C Grey outline marks highest
and lowest for the period

Daily minimum temperatures for March 2018
Offshore Islands (200)12345678910111213141516171819202122232425262728293031
Christmas Island Aero23.722.422.724.323.521.522.622.022.623.323.223.421.822.122.922.522.823.422.622.823.224.524.022.722.823.222.222.825.225.024.8
Cocos Island Airport26.126.525.825.923.424.524.923.925.324.425.825.425.225.926.025.424.026.025.526.523.524.623.423.524.325.024.225.025.427.025.1
Lord Howe Island Aero15.622.118.517.020.821.121.519.119.620.119.120.618.221.420.921.320.922.522.923.122.819.719.620.221.122.920.520.722.822.721.2
Norfolk Island Aero21.719.519.620.718.918.820.719.919.120.818.218.119.820.221.323.421.720.820.421.721.821.320.520.520.521.622.822.421.221.520.5
Antarctica and Macquarie Island (300)12345678910111213141516171819202122232425262728293031
Casey-5.9-7.6-9.8-11.6-15.0-10.6-14.3-13.6-20.6-17.8-20.5-20.3-12.9-14.1-9.0-12.4-9.5-10.3-18.4-14.7-6.2-7.0-10.4-18.3-17.5-11.9-6.4-6.3-3.2-6.8-5.9
Davis-9.0-7.6-8.3-10.7-11.1-11.2-9.9-7.2-5.8-11.2-18.0-18.0-17.8-14.5-4.8-7.2-7.6-11.7-11.7-15.9-15.8-16.6-14.5-13.0-10.3-12.7-10.9-13.1-11.7-9.5-9.1
Macquarie Island6.77.76.36.73.73.94.73.94.15.96.64.62.42.82.51.00.36.96.85.82.86.36.66.57.17.25.33.64.66.35.4
Mawson-9.1-12.7-14.5-12.9-13.0-14.6-15.4-16.7-14.8-14.3-13.1-13.6-16.4-19.4-18.8-10.1-13.7-15.6-17.1-20.7-19.5-17.5-16.4-12.2-9.1-12.2-12.7-14.3-16.4-18.2-13.3
Values are the minimum temperature, usually in the 24 hours to 9 am on the day indicated,
and typically occurred that morning.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 °C Grey outline marks highest
and lowest for the period

Daily precipitation for March 2018
Offshore Islands (200)12345678910111213141516171819202122232425262728293031
Christmas Island Aero 7.4 - - - 3.2 25.0 113 - 2.0 13.4 3.4 1.0 - - 5.4 12.4 32.2 6.2 20.2 0.6 - 0.6 3.2 64.8 1.2 0.2 - - - - 0.8
Cocos Island Airport 3.8 - 0.6 - 32.2 1.0 13.2 13.6 6.0 9.0 0.2 11.0 8.4 4.8 0.6 1.2 70.2 - 10.0 0.2 33.2 2.2 76.2 14.0 3.6 1.2 - - - - 0.4
Lord Howe Island (Milky Way) - 0.2 - - - - - 1.0 1.8 1.2 - 0.2 - - 2.2 - - - - - - 2.2 15.0 - - - 38.8 16.2 - - 0.2
Lord Howe Island Aero - 4.2 - - - - - 1.6 1.6 0.8 0.2 1.8 - - 1.2 - - - - - - 3.2 7.6 - - - 38.6 14.6 - - -
Norfolk Island Aero 1.4 0.2 - - - - 0.2 - 3.2 - 15.0 4.8 - - - 5.2 11.2 0.2 3.8 0.6 -
- - - - - - - - -
Antarctica and Macquarie Island (300)12345678910111213141516171819202122232425262728293031
Casey - - 0.4 - - - - - - - 0.4 -
- - - - 2.6 - - 1.0 - - - -
- 0.6 0.8 - -
Davis - - - - - - - 0.2 0.3 - - - - 0.9 - - 0.8 - - 0.2 - - - - - - - - - - -
Macquarie Island 2.6 0.2 0.2 17.6 13.0 3.6 3.6 3.4 - 6.4 10.4 5.2 3.6 4.0 2.8 7.2 1.4 4.4 14.6 3.0 2.4 - - 0.4 3.2 2.0 0.8 5.4 0.6 5.4 7.2
Most values are the precipitation in the 24 hours to 9 am on the day indicated. Days marked with → are part of a longer accumulation, which is shown on the final day.
Values over 100 mm have been rounded to the nearest whole millimetre.
Days marked with - have a precipitation report of zero; days left blank have no precipitation report (which often indicates no precipitation fell).
Precipitations coloured
according to the amount
0 1.0 5.0 10.0 15.0 25.0 50.0 100 150 200 300 400 600 millimetres

Map of the areas covered by this summary

Notes

The Monthly climate summary, generally published on the first working day of each month, lists the main features of the weather in Remote Islands and Antarctica 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 Tuesday 3 April 2018. 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 precipitation 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 precipitation.

The Rank indicates how precipitation this time compares with the climate record for the site, based on the decile ranking (very low precipitation 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 precipitation 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
Enquiries