Remote Islands and Antarctica in January 2018

Australia's Indian Ocean islands

  • With an active monsoon trough bringing cloudy skies, daytime temperatures were below average on both Christmas and the Cocos (Keeling) islands, whilst overnight temperatures were above average on Christmas Island and close to average at Cocos Islands Airport
  • Several days of moderate to heavy rain were reported at Cocos Islands Airport, including over 270 mm in the six days from the 22nd to the 27th, leading to a monthly total of 387.4 mm (the ninth-wettest January in 115 years of record)
  • Over 550 mm of rain fell at Christmas Island Airport, well above the January average of around 290 mm but short of the record 704.6 mm from January 2011 (the exact quantity for January 2018 is uncertain because of problems with the equipment)

Australia's Pacific Ocean islands

  • Temperatures were more than half a degree above average on Lord Howe Island, and almost a degree above average on Norfolk Island
  • Rain on Lord Howe Island fell mostly between the 11th and 18th, and totals for the month were about 60% of the January average
  • There were several wet spells on Norfolk Island: at the start of the month (including 78.2 mm in the 24 hours to 9 am on the 4th; the wettest January day since 1997), from the 19th to 24th, and further rain at the end of the month from the decaying tropical cyclone Fehi
  • Norfolk Island Airport's monthly total rainfall of 264.6 mm was the wettest January since 1986

Australia's Antarctic and sub-Antarctic territories

  • Mawson did not get above 0 °C for three days from the evening of the 25th until the afternoon of the 29th, an unusually long spell of cold weather for January
  • Temperatures at Mawson were a little below average overall
  • At Davis, a series of relatively warm days from the 4th to the 13th were followed by an extended cool spell; overall daytime temperatures were about half a degree above average but overnight temperatures were a little below average
  • Most days were cooler than average at Casey, leading to a monthly mean maximum temperature a little below average, whilst its mean minimum temperature was close to average
  • Macquarie Island was more than half a degree warmer than average by day and over a degree warmer than average by night, and had above average rain

Further information

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Highest January total precipitation for at least 20 years
Observed
(mm)
Most recent
higher
Average for
January
Norfolk Island Aero 264.6 301.0 in 1986 87.9



Summary statistics for January 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Precipitation
(millimetres)
Mean for
January
2018
Diff
from
average
Highest for
January
2018
Mean for
January
2018
Diff
from
average
Lowest for
January
2018
Total for
January
2018
Average
for
January
Rank of
January
2018
Fraction of
January
average
Offshore Islands (district 200)
Christmas Island Aero 27.8 -0.2 29.9 4th 23.2 +0.5 21.0 7th over 550 297.2
Cocos Island Airport 29.6 -0.1 30.9 21st 24.9 0.0 23.2 14th 387.4 164.0 v high 236%
Lord Howe Island Aero 26.0 +0.7 28.4 13th 21.2 +0.5 16.5 7th 65.4 111.0 average 59%
Norfolk Island Aero 25.5 +1.0 27.4 24th 20.1 +0.9 17.2 9th 264.6 87.9 v high 301%
Antarctica and Macquarie Island (district 300)
Casey 2.0 -0.3 6.1 10th -2.5 0.0 -9.2 31st 0.6 9.6 lowest 6%
Davis 3.6 +0.4 8.3 5th -1.3 -0.1 -3.4 25th 3.0 1.9 high 158%
Macquarie Island 9.5 +0.7 10.5 23rd 6.4 +1.1 4.6 6th 125.8 87.6 v high 144%
Mawson 2.4 -0.1 6.0 13th -3.1 -0.4 -6.6 25th
Note: Precipitation values from Casey and Davis should be used with caution.

Daily maximum temperatures for January 2018
Offshore Islands (200)12345678910111213141516171819202122232425262728293031
Christmas Island Aero28.128.428.829.927.225.428.429.128.226.327.725.927.428.628.327.927.728.528.228.628.927.427.426.227.624.727.228.828.628.5
Cocos Island Airport30.030.229.630.728.429.830.830.727.729.428.128.028.929.629.629.630.429.930.330.030.928.027.828.230.129.430.530.730.130.530.1
Lord Howe Island Aero25.426.425.825.625.526.326.227.427.927.826.226.128.425.223.322.822.523.925.025.826.326.426.427.027.627.326.926.626.426.325.8
Norfolk Island Aero24.625.523.725.225.424.624.324.024.025.125.425.326.425.826.424.925.625.825.225.726.626.126.327.427.026.425.925.724.7
Antarctica and Macquarie Island (300)12345678910111213141516171819202122232425262728293031
Casey0.10.80.21.10.31.71.51.45.26.15.34.14.04.75.01.90.40.91.61.41.91.50.90.71.22.22.32.60.0-0.42.3
Davis5.34.42.57.18.37.25.95.44.04.08.07.95.63.03.13.62.31.72.72.92.61.70.71.51.60.72.40.61.42.22.2
Davis (Whoop Whoop)7.33.95.71.81.32.60.4-2.90.80.1-0.7-2.2-2.21.7-2.5-3.4-0.13.9-4.1-2.2-5.7-3.9-4.8-4.9
Macquarie Island9.510.410.010.18.69.89.09.69.39.69.710.210.27.19.69.59.310.29.69.19.410.59.89.38.88.610.28.910.29.1
Mawson4.22.72.54.52.34.54.14.16.01.91.45.06.02.91.90.60.13.01.63.82.93.01.51.80.7-0.3-1.4-1.50.21.91.9
Wilkins Runway East-3.11.6-1.3-1.9-2.0-0.7-3.0-3.2-0.7-1.7-0.2-3.0-2.8-1.2-2.4-2.0-5.6
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 January 2018
Offshore Islands (200)12345678910111213141516171819202122232425262728293031
Christmas Island Aero24.123.323.923.822.823.121.022.524.422.822.923.422.622.922.223.123.324.224.424.524.924.321.921.922.522.523.223.023.122.922.4
Cocos Island Airport25.726.025.425.225.224.525.425.724.824.425.024.923.923.223.925.425.524.825.925.825.424.324.723.423.324.424.225.725.724.826.0
Lord Howe Island Aero17.421.820.920.721.318.116.522.523.423.021.416.822.723.518.718.318.118.320.321.822.121.521.923.223.423.523.723.523.322.423.4
Norfolk Island Aero18.918.320.820.721.319.518.717.417.219.219.718.518.119.121.220.419.019.519.419.620.020.821.321.822.322.521.121.222.422.4
Antarctica and Macquarie Island (300)12345678910111213141516171819202122232425262728293031
Casey-1.3-2.9-3.7-2.3-2.3-3.5-2.3-3.0-2.0-0.21.50.2-1.0-3.30.7-0.5-1.4-2.0-1.8-3.8-1.7-4.5-3.3-2.6-2.4-1.4-2.9-2.9-7.3-5.0-9.2
Davis-0.1-0.6-2.7-3.10.21.7-0.20.8-1.9-1.5-1.71.71.3-1.4-2.8-2.7-2.1-1.9-1.5-1.3-1.3-0.8-2.3-2.9-3.4-2.9-1.3-1.3-1.0-2.6-1.3
Davis (Whoop Whoop)-6.8-8.7-10.7-10.1-6.3-6.2-7.8-5.6-9.6-4.7-7.6-10.4-10.0-11.9-10.5-6.3-8.2-12.0-12.9-8.4-8.9-7.7-7.4-7.4
Macquarie Island6.26.06.27.35.74.66.96.66.56.55.87.88.56.45.45.77.35.16.85.76.67.47.26.95.45.66.76.46.96.15.9
Mawson-3.8-0.5-3.1-0.5-0.1-0.3-2.0-3.5-4.1-3.2-1.8-3.5-0.6-4.5-3.3-4.4-3.2-3.8-2.9-1.4-3.1-1.8-5.7-5.0-6.6-4.5-5.4-4.1-3.5-2.6-3.2
Wilkins Runway East-10.5-7.5-3.8-4.7-5.9-6.8-10.6-5.6-9.4-9.5-10.9-11.9-7.8-11.6-13.2-12.4-14.4
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 January 2018
Offshore Islands (200)12345678910111213141516171819202122232425262728293031
Christmas Island Aero 7.4 19.8 0.4 31.8 67.2 46.8 19.8 1.2 9.0 - - 26.4 26.8 41.8 11.8 0.2 0.2 5.0
Cocos Island Airport 0.2 - 3.2 25.2 5.0 11.6 - 1.4 8.8 17.0 11.0 6.4 22.6 0.2 0.4 0.2 - - - - 1.6 33.2 54.0 116 36.8 9.8 21.2 0.2 1.4 - 0.2
Lord Howe Island (Milky Way) - - - 3.8 0.4 - - - - - 15.6 - - 6.0 28.2 12.6 1.8 12.4 - 0.6 0.6 - - - - - - - - 4.6 0.2
Lord Howe Island Aero - - - 0.8 0.4 - - - - - 17.0 0.2 - 4.4 21.0 5.0 2.0 6.8 0.2 1.0 0.4 - - - - - - - - 6.0 0.2
Norfolk Island Aero 14.8 12.6 14.2 78.2 - - - - - - - - - - 2.4 4.8 6.4 - 0.8 21.8 0.8 39.0 12.4 9.2 0.2 - 2.0 1.2 0.4 5.0 38.4
Antarctica and Macquarie Island (300)12345678910111213141516171819202122232425262728293031
Casey - - - - - - - - - - - - - - 0.4 - 0.2 - -
- -
- - - - - - - -
Davis - - - - - - - - - - - - - - - - - 1.2 0.2 - - - 1.0 - - - - - - 0.6 -
Macquarie Island 5.8 12.2 1.4 3.4 1.4 13.8 0.2 3.0 1.4 - 0.2 - 2.6 28.2 0.4 4.2 2.0 9.0 7.8 2.6 0.4 5.6 0.2 3.6 0.2 2.6 2.4 7.4 1.8 -
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 2 pm on Thursday 1 February 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