Remote Islands and Antarctica in June 2018

Australia's Indian Ocean islands

  • There was less than 16 mm of rain at Christmas Island aerodrome, well down on the June average of 180 mm
  • Temperatures were below average on Christmas Island, with relatively cool days common from the 13th onward
  • Temperatures were almost a degree above average on the Cocos (Keeling) Islands
  • Cocos Islands Airport had its highest June temperature on record on the 5th with 30.9 °C
  • Rainfall was a little below average at Cocos Islands Airport

Australia's Pacific Ocean islands

  • Lord Howe Island was cooler than usual, especially overnight with several mornings dipping below 12 °C in the second half of the month
  • Most days and nights were warmer than usual on Norfolk Island, although cooler mornings became more common toward the end of the month
  • There was about two-thirds of the June average rainfall at both Lord Howe and Norfolk Islands

Australia's Antarctic and sub-Antarctic territories

  • Daytime temperatures were a degree above average at Davis, whilst minimum temperatures were more than two degrees above average
  • Mawson was more than two degrees warmer than average, with very cold weather only prominent in the first half of the month and in the final few days
  • Casey saw plenty of cold weather in the first half of the month (dipping to -24.0 °C on the morning of the 5th), but overall temperatures were more than a degree warmer than the June average
  • Macquarie Island had its warmest June night (highest daily minimum temperature) on record with a minimum of 6.9 °C on the 8th
  • Daytime temperatures were more than a degree above average on Macquarie Island, whilst minimum temperatures were record warm and almost two degrees above average; together this meant the Island had its highest June mean temperature on record
  • Macquarie Island recorded 45.6 mm of precipitation in the 24 hours to 9 am on Sunday 24 June; the highest June daily precipitation on record, and its fifth-highest for any time of year; daily rainfall records go back to 1948
  • Total precipitation was above average on Macquarie Island

Further information

Media
(03) 9669 4057
Enquiries

Record highest June daily precipitation
New record
(mm)
Old
record
Years of
record
Macquarie Island 45.6 on the 24th 35.0 on the 13th in 1993 71



Record highest June temperature
New record
(°C)
Old
record
Years of
record
Average for
June
Cocos Island Airport 30.9 on the 5th 30.8 on the 7th in 2014 67 28.6



Record highest June daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
June
Macquarie Island 6.9 on the 8th 6.8 on the 16th in 2007 71 1.6



Record highest June mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
June
Macquarie Island 3.5 3.1 in 1997 70 1.6



Record highest June mean temperature
New record
(°C)
Old
record
Years of
record
Average for
June
Macquarie Island 4.9 4.7 in 1979 70 3.3



Summary statistics for June 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Precipitation
(millimetres)
Mean for
June
2018
Diff
from
average
Highest for
June
2018
Mean for
June
2018
Diff
from
average
Lowest for
June
2018
Total for
June
2018
Average
for
June
Rank of
June
2018
Fraction of
June
average
Offshore Islands (district 200)
Christmas Island Aero 26.6 -0.5 28.3 2nd 23.0 -0.3 21.5 6th 15.6 176.4 v low 9%
Cocos Island Airport 29.4 +0.8 30.9 5th 25.4 +0.9 23.1 10th 180.6 214.3 average 84%
Lord Howe Island Aero 19.8 -0.1 22.6 13th 14.1 -0.8 9.8 23rd 108.0 168.5 low 64%
Norfolk Island Aero 19.8 +0.5 21.5 17th 15.0 +0.3 11.6 25th 98.8 144.4 low 68%
Antarctica and Macquarie Island (district 300)
Casey -9.4 +1.3 -1.3 21st -16.2 +2.4 -24.0 5th 41.6 26.6 high 156%
Davis -11.6 +1.0 -5.1 23rd -16.4 +2.5 -26.7 30th 2.0 9.5 low 21%
Macquarie Island 6.3 +1.2 7.6 8th 3.5 +1.9 -1.9 25th 92.2 77.8 high 119%
Mawson -11.0 +2.6 -4.3 17th -17.6 +2.1 -25.4 30th
Note: Precipitation values from Casey and Davis should be used with caution.

Daily maximum temperatures for June 2018
Offshore Islands (200)123456789101112131415161718192021222324252627282930
Christmas Island Aero27.628.328.227.628.027.427.426.927.427.026.826.625.725.226.526.926.826.526.225.926.025.925.425.926.425.926.126.026.126.1
Cocos Island Airport29.530.130.230.230.929.327.227.429.029.630.330.330.130.029.529.329.427.828.229.429.229.628.829.129.030.529.229.429.530.5
Lord Howe Island Aero19.119.620.419.819.719.319.320.020.219.818.920.622.620.820.420.420.118.618.719.219.118.819.419.418.619.018.920.019.722.1
Norfolk Island Aero21.021.320.821.120.419.517.718.820.419.520.421.220.321.120.821.221.520.019.819.119.819.219.117.719.618.318.718.418.719.8
Antarctica and Macquarie Island (300)123456789101112131415161718192021222324252627282930
Casey-2.3-5.5-12.8-16.4-17.5-17.3-7.9-7.1-10.5-13.4-16.7-15.5-13.1-7.8-4.1-6.5-8.1-7.2-9.1-5.4-1.3-6.2-5.9-5.5-7.1-12.3-12.5-7.9-9.2
Davis-18.7-14.4-9.1-8.0-8.0-10.5-13.7-13.8-11.8-10.6-8.3-6.9-7.7-10.7-5.2-8.2-13.8-15.6-9.1-5.3-6.1-5.6-5.1-5.5-14.4-19.1-20.4-21.8-22.9-16.7
Macquarie Island6.56.56.55.87.47.47.67.64.57.27.57.56.67.26.25.44.56.26.37.06.96.15.42.95.96.23.86.17.26.0
Mawson-18.8-11.7-10.1-11.1-12.8-11.0-13.1-15.9-18.0-15.2-4.7-4.6-7.8-10.9-10.7-7.2-4.3-5.1-10.7-11.3-7.7-8.3-7.8-9.4-11.4-9.7-11.9-18.0-18.3-12.4
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 June 2018
Offshore Islands (200)123456789101112131415161718192021222324252627282930
Christmas Island Aero23.724.524.724.122.321.522.223.223.523.523.723.921.921.622.923.223.122.822.823.523.123.422.122.622.923.022.922.722.822.4
Cocos Island Airport25.224.425.725.626.825.523.723.223.823.126.327.226.925.826.325.725.223.323.125.424.726.025.626.024.826.026.526.926.626.4
Lord Howe Island Aero12.015.116.215.514.615.416.315.214.016.116.016.213.513.911.713.813.912.613.212.014.114.79.810.415.314.011.414.915.016.9
Norfolk Island Aero13.615.015.217.417.115.513.614.314.315.315.515.116.614.014.616.117.517.715.812.015.715.714.713.211.614.615.313.614.313.7
Antarctica and Macquarie Island (300)123456789101112131415161718192021222324252627282930
Casey-7.5-7.2-14.5-19.9-24.0-23.4-19.3-17.6-12.1-14.2-19.4-23.9-22.9-21.4-20.9-9.1-18.0-21.9-16.5-15.5-10.6-10.7-15.0-11.8-13.0-14.0-17.1-14.8-15.4-13.1
Davis-21.4-21.3-20.1-15.2-11.6-10.9-14.0-16.8-17.5-16.5-13.3-14.3-10.7-15.3-17.2-11.3-14.7-18.3-18.9-16.8-10.1-10.2-9.2-10.0-15.0-19.8-24.0-25.4-26.0-26.7
Macquarie Island4.55.15.64.40.71.96.96.93.40.82.66.85.93.35.34.1-0.8-0.14.44.45.55.14.80.7-1.91.53.61.63.34.2
Mawson-23.6-24.4-19.5-14.5-15.3-18.6-19.7-18.8-20.7-23.1-23.3-15.9-11.4-12.8-19.4-19.2-12.6-10.7-12.2-18.8-18.7-13.1-11.9-14.2-14.1-16.4-17.2-19.8-23.3-25.4
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 June 2018
Offshore Islands (200)123456789101112131415161718192021222324252627282930
Christmas Island Aero - - - - - - 0.2 - - - - - 7.2 5.2 - - - - - - - - 3.0 - - - - - - -
Cocos Island Airport 1.0 0.6 - 2.8 0.4 6.6 58.8 5.2 10.6 59.4 0.4 - 0.4 - - - - 2.4 8.0 2.0 16.8 0.4 0.8 - 1.6 - 2.4 - - -
Lord Howe Island (Milky Way) 11.6 2.8 2.4 2.8 7.4 1.2 - 0.2 - 6.6 5.8 5.2 - 2.6 0.4 4.8 0.8 6.6 2.0 - 2.4 10.0 3.4 0.2 0.2 - 0.4 0.4 10.0 7.4
Lord Howe Island Aero 12.0 1.6 6.6 3.4 8.6 0.8 - 0.2 - 5.6 3.0 7.0 0.2 6.0 1.0 3.6 1.0 9.2 1.2 - 3.4 10.2 7.2 - - - 0.8 - 5.8 9.6
Norfolk Island Aero 36.2 5.6 19.8 9.8 0.2 0.4 - - 1.6 - - 0.8 0.8 - - - - 0.4 8.2 8.4 0.2
3.0 0.8 - 0.4 0.2 0.8 0.8 0.4
Antarctica and Macquarie Island (300)123456789101112131415161718192021222324252627282930
Casey 0.6 4.2 0.4 0.6 - - 3.0 5.4 7.8 - - - - 2.6 0.2
-
-


0.2 7.8 6.6 0.4
0.8 - 1.0
Davis - - - - -
- - - - 1.2 - - - - 0.8 - - - -
- - - -
- - - -
Macquarie Island - 0.6 2.0 1.4 1.8 1.2 - 1.8 11.2 4.0 0.8 0.2 - 0.4 2.6 0.4 0.2 0.4 2.2 0.6 1.8 1.2 1.6 45.6 4.0 0.4 0.6 - 0.4 4.8
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 Monday 2 July 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