Remote Islands and Antarctica in March 2019

Australia's Indian Ocean islands

  • A low pressure system in the monsoon trough brought several days of moderate rain and relatively cool weather to Christmas Island early in the month
  • Christmas Island Airport registered an above-average 342.8 mm of rainfall for the month
  • Mean monthly temperatures on Christmas Island were a little warmer than average
  • Tropical cyclone Savannah passed to the west of the Cocos (Keeling) Islands on the 14th, but brought only moderate rain
  • Cocos Islands Airport received 86.4 mm of rainfall for the month, about one-third of the long-term March average
  • Temperatures at Cocos Islands Airport were about half a degree warmer than average

Australia's Pacific Ocean islands

  • Lord Howe Island had its warmest March on record, with the airport setting new records for highest March mean daily maximum temperature and highest March mean daily minimum temperature
  • Included in the warm weather on Lord Howe Island was a minimum temperature of 24.1 °C on the 26th, the warmest March night (highest daily minimum temperature) on record
  • Lord Howe Island Airport's maximum temperature of 28.1 °C on the 25th was just 0.1 °C off the highest March temperature recorded at the site (in 2015 and 2011)
  • A low pressure trough brought moderate rain to Lord Howe Island on 18th and again on the 19th, but total rainfall for the month was only about three-quarters of the March average
  • An almost stationary trough brought over 290 mm of rain to Norfolk Island in the 60 hours between 5 am on the 14th and 5 pm on the 17th, including 71.6 mm in 2 hours on the afternoon of the 15th
  • Norfolk Island Airport's rainfall for the month of 318.6 mm was its wettest March since 1962 and the wettest month since December 2011
  • Temperatures were more than a degree above the March average on Norfolk Island

Australia's Antarctic and sub-Antarctic territories

  • Temperatures were a little warmer than average at Mawson, despite a week of cold weather from the 16th
  • At Davis, it was almost a degree warmer than the March average, despite temperatures dropping well below average to -18.7 °C on the 21st
  • Casey's mean maximum temperature was almost a degree above average, and its mean minimum temperature was about one and a half degrees above average
  • Macquarie Island had only a few especially cold days, and was about a degree warmer than average overall
  • Rainfall on Macquarie Island was above average, with much of the total coming from a front and low pressure system near the middle of the month, and further rain from another front and low near the end of the month

Further information

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Highest March total precipitation for at least 20 years
Observed
(mm)
Most recent
higher
Average for
March
Norfolk Island Aero 318.6 350.0 in 1962 103.8



Record highest March mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
March
Lord Howe Island Aero 26.5 26.0 in 2016 30 24.9



Record highest March daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
March
Lord Howe Island Aero 24.1 on the 26th 23.9 on the 1st in 2012 31 20.1



Record highest March mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
March
Lord Howe Island Aero 21.7 21.2 in 2016 30 20.1



Record highest March mean temperature
New record
(°C)
Old
record
Years of
record
Average for
March
Lord Howe Island Aero 24.1 23.6 in 2016 30 22.5



Summary statistics for March 2019
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Precipitation
(millimetres)
Mean for
March
2019
Diff
from
average
Highest for
March
2019
Mean for
March
2019
Diff
from
average
Lowest for
March
2019
Total for
March
2019
Average
for
March
Rank of
March
2019
Fraction of
March
average
Offshore Islands (district 200)
Christmas Island Aero 28.6 +0.3 29.9 14th 23.2 +0.1 21.7 7th 342.8 302.2 high 113%
Cocos Island Airport 30.6 +0.6 31.5 5th 25.6 +0.4 23.9 25th 86.4 234.0 low 37%
Lord Howe Island Aero 26.5 +1.6 28.1 25th 21.7 +1.6 19.2 24th 104.6 127.6 average 82%
Norfolk Island Aero 25.3 +1.0 26.3 30th 20.5 +1.2 17.3 10th 318.6 103.8 v high 307%
Antarctica and Macquarie Island (district 300)
Casey -3.5 +0.7 1.1 2nd -8.3 +1.7 -13.5 26th 8.3 16.4 low 51%
Davis -5.1 +0.6 -0.5 6th -10.2 +0.7 -18.7 21st 12.4 9.1 high 136%
Macquarie Island 8.9 +0.9 10.8 22nd 5.8 +1.1 3.1 14th 130.8 101.0 high 130%
Mawson -7.1 +0.1 -1.8 1st -12.8 +0.5 -19.4 16th
Note: Precipitation values from Casey and Davis should be used with caution.

Daily maximum temperatures for March 2019
Offshore Islands (200)12345678910111213141516171819202122232425262728293031
Christmas Island Aero29.427.027.026.528.826.428.428.828.728.128.429.729.329.928.429.529.428.028.728.828.328.228.929.229.328.928.928.628.628.629.2
Cocos Island Airport30.430.331.531.131.531.431.330.930.931.130.931.131.029.331.130.831.030.930.929.930.530.130.630.028.229.230.330.529.930.7
Lord Howe Island Aero25.624.725.025.926.326.827.425.826.227.226.927.926.526.426.826.827.726.926.027.026.826.927.427.628.126.824.825.526.026.823.6
Norfolk Island Aero24.625.124.925.424.725.126.124.924.924.526.226.225.823.123.725.526.125.526.025.425.725.425.925.625.125.525.525.224.926.326.2
Antarctica and Macquarie Island (300)12345678910111213141516171819202122232425262728293031
Casey-0.31.1-0.6-1.4-1.5-1.9-3.2-5.0-3.9-5.4-7.1-5.1-2.5-0.2-0.2-2.0-3.4-4.0-3.8-3.0-5.6-4.3-3.3-3.0-4.7-2.7-4.2-5.9-5.9-7.8-8.6
Davis-1.6-1.7-3.0-2.3-2.3-0.5-2.4-2.5-4.0-6.9-5.9-3.8-3.0-4.1-6.6-2.4-3.6-5.6-4.4-8.6-10.9-9.3-5.1-4.7-5.6-7.5-8.7-7.4-4.8-5.4-13.5
Macquarie Island8.79.19.29.110.27.48.89.18.78.88.59.16.88.08.18.28.69.09.49.79.310.88.59.010.510.17.68.79.610.07.8
Mawson-1.8-2.1-3.0-5.1-6.8-5.0-3.8-3.2-4.1-7.7-8.8-4.4-2.9-6.0-9.9-10.7-10.3-9.7-10.0-10.7-7.4-8.7-7.3-6.7-8.2-9.3-7.5-9.7-9.0-10.4-9.8
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 2019
Offshore Islands (200)12345678910111213141516171819202122232425262728293031
Christmas Island Aero25.923.222.522.622.422.721.722.523.024.522.423.422.924.423.323.524.124.323.725.123.722.723.722.221.922.222.022.522.922.623.7
Cocos Island Airport26.526.426.725.226.826.625.826.024.225.024.527.027.225.025.825.626.224.026.426.225.226.325.425.523.923.925.526.624.324.825.7
Lord Howe Island Aero21.619.420.122.122.423.022.421.421.922.523.223.920.419.921.520.923.722.821.620.620.522.419.619.223.624.121.720.821.922.822.0
Norfolk Island Aero20.119.720.419.320.519.920.620.721.417.319.621.121.021.220.220.521.921.421.521.020.921.120.222.419.620.421.720.220.119.219.2
Antarctica and Macquarie Island (300)12345678910111213141516171819202122232425262728293031
Casey-9.3-7.9-4.6-3.2-5.2-8.2-9.8-7.2-9.1-7.8-9.8-8.8-10.3-9.7-3.0-3.1-4.3-6.4-7.6-9.0-9.1-12.1-10.7-8.5-8.6-13.5-8.4-8.9-10.0-10.2-12.3
Davis-4.6-4.0-4.6-6.9-9.7-6.5-3.9-4.8-5.3-9.2-10.0-11.8-11.1-11.4-10.3-10.1-6.9-7.1-8.2-14.0-18.7-17.1-16.0-11.0-7.2-8.6-16.8-15.7-16.6-15.7-13.7
Macquarie Island6.66.67.46.27.16.65.34.76.05.36.76.13.63.15.15.86.66.16.45.06.66.03.67.04.85.43.34.77.47.57.5
Mawson-6.4-4.5-7.6-7.5-10.8-10.0-11.1-8.9-6.7-12.6-12.8-13.0-9.4-8.5-15.4-19.4-19.3-17.6-17.7-17.7-16.0-15.4-14.2-11.2-11.1-16.8-14.5-13.5-14.8-15.5-16.0
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 2019
Offshore Islands (200)12345678910111213141516171819202122232425262728293031
Christmas Island Aero - 29.2 69.2 33.0 78.0 23.4 11.6 17.2 0.4 7.6 3.2 15.8 4.4 3.8 6.2 0.2 1.2 5.0 2.6 10.0 0.2 18.4 - 0.8 - 1.2 - 0.2 - -
Cocos Island Airport - 0.2 - 2.6 - 0.6 1.8 - - 0.6 21.2 - - 22.6 2.8 1.0 2.2 8.4 - 1.6 3.8 - 0.6 - 2.2 3.2 1.8
- 0.8 8.4
Lord Howe Island (Milky Way) 0.4 - 3.0 0.4 - 0.2 6.0 - - 0.4 0.2 - 21.0 0.2 - - - - 33.6 37.8 1.2 1.0 - - - - 14.0 0.2 - - 7.0
Lord Howe Island Aero 0.4 1.0 1.4 - - - 9.0 - 0.2 0.4 0.4 - 11.8 - 0.2 - - - 20.6 31.2 1.8 1.6 0.2 5.0 - - 10.0 - - - 9.4
Norfolk Island Aero - - - 0.4 3.2 - 0.2 - - - - - 0.2 1.4 113 150 27.6 - - - 0.2 0.2 10.0 - 10.8 - 0.8 - - 0.6 -
Antarctica and Macquarie Island (300)12345678910111213141516171819202122232425262728293031
Casey
0.5
0.2 - - - 0.2 - 1.0 1.2 0.1
-
- 0.8 0.5 0.4 -
- - - 3.4 - - - - - -
Davis - - - 0.6 - - 0.6 - - 0.2 0.4 - - - - - - 2.4 1.0 - - - - 1.2 5.2 0.4 - - - 0.4 -
Macquarie Island 1.6 0.2 0.2 - 3.0 1.4 3.6 7.2 4.4 0.6 3.4 7.4 38.8 5.2 7.6 2.2 0.4 - - 0.2 0.4 - - 1.4 0.2 8.0 6.8 0.6 1.4 5.2 19.4
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 2 pm on Monday 1 April 2019. 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