Remote Islands and Antarctica in October 2017

Australia's Indian Ocean islands

Australia's Pacific Ocean islands

Australia's Antarctic and sub-Antarctic territories

  • It was the third month in a row with temperatures below average at Mawson and Davis, and the fifth consecutive below-average month at Casey which reported its lowest October mean daily maximum temperature since 1993
  • After a very cold start, temperatures at Australia's Antarctic sites did warm markedly in the second half of the month, but cold weather returned to Casey and Davis in the final week
  • Macquarie Island was about half a degree warmer than average by day, and a little warmer than average by night
  • Total precipitation on Macquarie Island was well above average in October, following on from the record wet September

Further information

Media
(03) 9669 4057
Enquiries

Lowest October total precipitation for at least 20 years
Observed
(mm)
Most recent
lower
Average for
October
Norfolk Island Aero 14.6 11.9 in 1938 83.3



Record highest October temperature
New record
(°C)
Old
record
Years of
record
Average for
October
Lord Howe Island Aero 24.9 on the 30th = 24.9 on the 4th in 1998 29 20.9



Record highest October mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
October
Lord Howe Island Aero 21.9 21.8 in 2005 28 20.9



Lowest October mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
October
Casey -10.2 -10.5 in 1993 -8.0
Cocos Island Airport 28.3 28.1 in 1993 28.7



Record highest October daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
October
Lord Howe Island Aero 21.7 on the 31st 20.9 on the 28th in 2014 29 15.7



Record highest October mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
October
Lord Howe Island Aero 17.3 16.8 in 2005 28 15.7



Record highest October mean temperature
New record
(°C)
Old
record
Years of
record
Average for
October
Lord Howe Island Aero 19.6 19.3 in 2005 28 18.3



Lowest October mean temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
October
Cocos Island Airport 26.2 26.0 in 1993 26.5



Summary statistics for October 2017
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Precipitation
(millimetres)
Mean for
October
2017
Diff
from
average
Highest for
October
2017
Mean for
October
2017
Diff
from
average
Lowest for
October
2017
Total for
October
2017
Average
for
October
Rank of
October
2017
Fraction of
October
average
Offshore Islands (district 200)
Christmas Island Aero 26.6 -0.3 28.0 12th 22.8 +0.1 21.6 3rd 20.6 77.2 average 27%
Cocos Island Airport 28.3 -0.4 30.0 14th 24.1 -0.1 22.7 26th 17.6 82.0 low 21%
Lord Howe Island Aero 21.9 +1.0 24.9 30th 17.3 +1.6 12.5 3rd 76.8 102.3 low 75%
Norfolk Island Aero 20.7 +0.5 24.0 30th 15.5 +0.7 13.1 3rd 14.6 83.3 v low 18%
Antarctica and Macquarie Island (district 300)
Casey -10.2 -2.2 -1.0 17th -16.5 -1.6 -26.5 1st 3.4 15.9 v low 21%
Davis -10.2 -1.2 -3.0 18th -16.8 -1.4 -28.8 1st 2.6 4.6 average 57%
Macquarie Island 6.3 +0.5 8.2 29th 2.2 +0.2 -1.8 16th 112.0 78.7 high 142%
Mawson -10.3 -0.4 -4.6 18th -17.0 -0.6 -22.7 3rd
Note: Precipitation values from Casey and Davis should be used with caution.

Daily maximum temperatures for October 2017
Offshore Islands (200)12345678910111213141516171819202122232425262728293031
Christmas Island Aero26.625.726.726.026.825.426.126.226.425.825.828.026.127.425.326.426.325.726.726.426.926.827.426.927.426.926.027.726.627.627.6
Cocos Island Airport27.428.428.727.728.428.828.527.628.328.528.027.729.130.028.627.927.227.328.228.228.328.528.528.627.528.228.729.428.828.627.5
Lord Howe Island Aero19.721.120.521.721.922.721.320.421.724.421.621.821.820.820.719.920.021.221.323.022.220.021.122.123.424.423.123.824.024.922.0
Norfolk Island Aero19.519.319.418.719.420.521.621.320.821.020.920.020.121.121.019.220.019.019.320.220.622.121.520.620.520.121.622.723.024.022.5
Antarctica and Macquarie Island (300)12345678910111213141516171819202122232425262728293031
Casey-16.1-16.7-10.0-14.4-12.8-11.0-12.3-11.8-12.2-13.0-14.3-12.5-14.1-13.0-10.3-3.4-1.0-2.8-6.0-6.4-5.9-6.3-7.3-9.4-10.0-12.8-11.4-10.4-10.3-8.3-9.2
Davis-20.3-16.7-11.8-11.3-13.1-11.8-12.3-8.9-4.8-8.3-6.8-12.7-13.3-14.5-12.4-11.7-4.7-3.0-7.6-5.6-5.2-9.0-9.3-9.6-9.6-9.5-10.0-12.3-9.9-8.0-10.9
Macquarie Island5.55.96.35.86.46.06.96.96.78.16.67.47.46.23.44.46.47.37.27.75.14.35.23.74.66.07.18.28.27.28.0
Mawson-15.2-15.8-16.1-11.0-15.1-11.7-11.1-10.7-9.7-8.5-10.5-11.7-10.3-12.6-13.3-12.7-10.5-4.6-7.1-8.1-5.8-6.0-8.0-9.2-9.8-7.6-7.9-9.8-9.8-10.9-9.5
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 October 2017
Offshore Islands (200)12345678910111213141516171819202122232425262728293031
Christmas Island Aero22.622.321.622.823.323.422.522.322.623.023.223.024.123.423.522.222.522.623.022.822.722.722.322.422.923.023.422.523.123.222.9
Cocos Island Airport23.624.324.524.424.824.823.324.424.423.924.625.024.324.725.723.423.124.023.424.123.124.324.024.324.022.724.124.724.724.522.9
Lord Howe Island Aero16.512.812.517.918.819.418.517.212.918.917.219.317.818.618.117.617.618.018.118.317.416.112.712.513.619.916.617.720.120.821.7
Norfolk Island Aero17.515.113.113.614.113.316.216.315.915.317.413.414.015.214.516.415.315.514.315.213.915.718.216.414.313.413.717.118.218.619.0
Antarctica and Macquarie Island (300)12345678910111213141516171819202122232425262728293031
Casey-26.5-22.1-23.3-20.7-21.6-16.6-17.1-14.9-18.1-16.9-17.1-21.3-18.0-17.2-19.7-13.4-11.2-8.0-11.0-13.6-10.6-11.3-13.5-11.3-13.2-17.2-20.6-16.7-17.1-18.5-13.4
Davis-28.8-28.6-24.9-16.9-21.0-17.9-20.0-16.1-14.0-19.5-14.8-14.4-18.0-20.9-18.8-14.7-14.9-11.9-13.2-12.4-10.0-13.0-12.0-13.1-15.6-17.5-13.9-15.5-17.8-17.1-14.5
Macquarie Island1.40.62.4-0.11.41.62.14.85.14.9-0.51.53.11.70.7-1.81.64.05.33.31.2-0.20.0-0.5-1.11.52.25.65.34.65.4
Mawson-20.8-20.2-22.7-21.1-19.4-18.5-16.6-16.0-15.1-16.3-18.3-19.9-17.0-19.4-20.4-20.1-18.4-17.0-12.9-14.5-14.1-11.9-15.2-14.2-15.4-13.7-12.1-15.2-14.7-18.9-16.6
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 October 2017
Offshore Islands (200)12345678910111213141516171819202122232425262728293031
Christmas Island Aero 4.2 - 1.0 - - 0.2 3.6 3.8 0.4 - - 0.4 1.2 - 3.6 1.2 - - - - - - - - - - - 0.8 0.2 - -
Cocos Island Airport 0.8 0.2 - - - - - - - - - - 0.2 0.4 0.6 9.4 2.0
- - 0.6 - - - - 2.0 - - - - 1.4
Lord Howe Island (Milky Way) - - - - - 1.2 7.8 - - 1.2 - - 21.2 - - - - - - - - 9.8 0.2 - - - 19.8 3.2 2.4 - -
Lord Howe Island Aero - - - - - 1.4 10.0 0.2 - 0.8 - - 15.2 - - - - - - - - 22.0 1.4 3.0 0.2 - 19.8 2.6 0.2 - -
Norfolk Island Aero - - - - 0.2 - - 7.0 - - - - - - - 0.4 - - - 0.2 - - 2.8 - - - - - - 0.2 3.8
Antarctica and Macquarie Island (300)12345678910111213141516171819202122232425262728293031
Casey - 0.2 - 0.4 - - - - - - 0.6 - - - - 1.6
- - - - - - - - - - 0.4 0.2 - -
Davis - - - - - - - - - - 0.6 0.6 - - - 0.8 0.2 - - - - - - 0.4 - - - - - - -
Macquarie Island 7.0 4.6 3.2 5.6 0.6 3.2 1.6 0.2 0.2 6.4 5.8 0.6 21.6 6.6 11.2 2.0 0.4 1.0 2.0 0.6 4.2 4.0 1.8 3.6 1.6 7.0 0.4 0.4 1.8 1.6 1.2
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 2 pm on Wednesday 1 November 2017. 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.

Further information

Media
(03) 9669 4057
Enquiries