Remote Islands and Antarctica in winter 2018

Australia's Indian Ocean islands

Australia's Pacific Ocean islands

Australia's Antarctic and sub-Antarctic territories

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Record highest winter daily precipitation
New record
(mm)
Old
record
Years of
record
Macquarie Island 46.8 on 24 Jun 37.1 on 23 Jul 1969 71



Lowest winter total precipitation for at least 20 years
Observed
(mm)
Most recent
lower
Average for
winter
Norfolk Island Aero 185.0 174.2 in 1976 408.1



Record highest winter temperature
New record
(°C)
Old
record
Years of
record
Average for
winter
Cocos Island Airport 30.9 on 5 Jun 30.8 on 7 Jun 2014 67 28.2



Record highest winter mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
winter
Macquarie Island 6.0 = 6.0 in 1971 70 5.0
Mawson -11.5 -11.7 in 1991 64 -14.7



Lowest winter mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
winter
Christmas Island Aero 25.6 25.4 in 1978* 26.5

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




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



Record lowest winter temperature
New record
(°C)
Old
record
Years of
record
Average for
winter
Lord Howe Island Aero 6.1 on 23 Jul 6.6 on 5 Aug 2011 30 14.1



Record highest winter mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
winter
Macquarie Island 3.0 2.9 in 1971 70 1.6



Record lowest winter mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
winter
Lord Howe Island Aero 13.4 = 13.4 in 1994 29 14.1

Lowest winter mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
winter
Christmas Island Aero 21.7 =21.7 in 1994 22.7



Record highest winter mean temperature
New record
(°C)
Old
record
Years of
record
Average for
winter
Macquarie Island 4.5 4.4 in 1971 70 3.3
Mawson -14.5 = -14.5 in 1977 64 -17.7



Lowest winter mean temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
winter
Christmas Island Aero 23.7 =23.7 in 1994 24.6



Summary statistics for winter 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Precipitation
(millimetres)
Mean for
winter
2018
Diff
from
average
Highest for
winter
2018
Mean for
winter
2018
Diff
from
average
Lowest for
winter
2018
Total for
winter
2018
Average
for
winter
Rank of
winter
2018
Fraction of
winter
average
Offshore Islands (district 200)
Christmas Island Aero 25.6 -0.9 28.3 2 Jun 21.7 -1.0 18.4 4 Aug 54.2 315.2 v low 17%
Cocos Island Airport 28.5 +0.3 30.9 5 Jun 24.5 +0.3 22.0 16 Jul 335.6 546.3 low 61%
Lord Howe Island Aero 19.5 +0.2 22.6 13 Jun 13.4 -0.7 6.1 23 Jul 295.4 416.5 v low 71%
Norfolk Island Aero 19.4 +0.7 21.5 17 Jun 14.2 +0.4 11.6 25 Jun 185.0 408.1 v low 45%
Antarctica and Macquarie Island (district 300)
Casey -10.7 0.0 3.0 27 Jul -17.8 +0.9 -33.0 28 Aug
Davis -10.6 +3.1 -0.3 25 Jul -16.5 +3.7 -28.0 4 Jul 14.4 24.3 low 59%
Macquarie Island 6.0 +1.0 8.2 10 Aug 3.0 +1.4 -1.9 25 Jun 243.6 227.4 average 107%
Mawson -11.5 +3.2 -2.8 25 Jul -17.6 +3.2 -33.9 10 Jul
Note: Precipitation values from Casey and Davis should be used with caution.

Map of the areas covered by this summary

Notes

The Seasonal 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 9 am on Monday 3 September 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