Tasmania in October 2018: a warm, dry month

It was a relatively warm and dry October for Tasmania, with some especially warm weather around the middle of the month. There were fewer cold fronts and windy days than is typical for the time of year.

A relatively dry month

  • Rainfall was below average across Tasmania, and very much below average in many areas
  • It was the third-driest October in terms of total State rainfall, but much wetter than the record dry October 2015
  • Showers and localised thunderstorms triggered by a low pressure system gave some moderate falls from the 16th to the 18th, including 25 mm in 4 hours at Clifton Beach on the afternoon of the 18th
  • There were fewer cold fronts and westerly winds than usual for the time of year. Even though the wettest part of the State was the western highlands they received markedly less rain than is typical of October
  • There was little of the strong wind that is typical of spring in Tasmania: on only four days did a site report a wind gust of 100 km/h compared to around ten such gusty days in most Octobers

A warm October

  • Temperatures were above the October average for all of Tasmania
  • After a mixed start of some mild days and some cool days, warm weather was dominant from the 13th to the 23rd before cool weather returned
  • The 14th to the 19th were especially warm when a high pressure system over the southern Tasman Sea directed north to northeasterly winds across the State
  • A few sites in the north had their warmest October night (highest daily minimum temperature) on record on either the 16th or 17th
  • Averaged across the month and over the State, it was Tasmania's seventh-warmest October on record, with the mean temperature 1.12 °C above average
  • The State's mean maximum temperature was 1.56 °C above average and the fifth-warmest on record for October, whilst the mean minimum temperature was tenth-warmest at 0.67 °C above average
  • Although warm, this month was generally cooler than October 2017

A warm, mostly dry month for Hobart

  • Total rainfall for Hobart (Ellerslie Road) was 30.2 mm, which is about half the long-term average
  • The mean daily maximum temperature for Hobart (Ellerslie Road) was 18.3 °C, which is 1.3 °C above the long-term average of 17.0 °C.
  • Hobart's temperature reached 25.4 °C on the 15th then only fell to a minimum of 15.9 °C the next morning; these were the warmest day and night since the middle of March
  • On the 10th the temperature reached 11.4 °C, cooler than any day in September
  • The mean daily minimum temperature for Hobart (Ellerslie Road) was 9.1 °C, which is 1.3 °C above the long-term average of 7.8 °C
  • The coldest morning was 3.2 °C on the 4th

Further information

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Extremes in October 2018
Hottest day 28.1 °C at Scotts Peak Dam on the 15th
Warmest days on average 19.5 °C at Launceston (Ti Tree Bend)
Coolest days on average 9.3 °C at Mount Read
Coldest day 1.1 °C at kunanyi (Mount Wellington Pinnacle) on the 10th
Coldest night -6.3 °C at Liawenee on the 11th
Coolest nights on average 1.3 °C at Liawenee
Warmest nights on average 11.0 °C at Swan Island
Warmest night 17.4 °C at Strahan Aerodrome on the 15th and 16th
Warmest on average overall 14.2 °C at larapuna (Eddystone Point)
Coolest on average overall 5.5 °C at kunanyi (Mount Wellington Pinnacle)
Wettest overall 170.2 mm at Mount Read
Wettest day 34.0 mm at Mount Read on the 19th
Strongest wind gust 109 km/h at Maatsuyker Island Lighthouse on the 23rd

Maps
ObservedAnomalyDecile rank
Total
rainfall
Map of Rainfall totals Map of Percentage of normal rainfall Map of Rainfall deciles
Mean
daily
maximum
temperatures
Map of Mean maximum temperature Map of Anomaly in mean maximum temperature Map of Decile rank of mean maximum temperature
Mean
daily
minimum
temperatures
Map of Mean minimum temperature Map of Anomaly in mean minimum temperature Map of Decile rank of mean minimum temperature

Click on a map to show it full size in a pop-up window


Record highest October mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
October
Devonport Airport 17.2 17.0 in 2017 26 15.9

Highest October mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
October
Cape Sorell 16.5 16.6 in 1903* 14.4

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




Record highest October daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
October
larapuna (Eddystone Point) 15.1 on the 16th 14.9 on the 16th in 2015 108 9.0
Wynyard Airport 15.7 on the 16th 15.0 on the 30th in 1992 32 6.2
Devonport Airport 15.6 on the 17th 14.6 on the 28th in 2017 27 7.3
Cape Sorell 16.9 on the 16th 16.1 on the 18th in 2017 22 8.7
Sheffield School Farm 14.2 on the 17th 13.6 on the 31st in 2010 22 5.7
Smithton Aerodrome 15.9 on the 16th 15.6 on the 27th in 2008 22 6.9



Record highest October mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
October
Maatsuyker Island Lighthouse 9.0 = 9.0 in 1963 81 7.5
Scotts Peak Dam 6.4 = 6.4 in 2017 20 5.1



Highest October mean temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
October
Maatsuyker Island Lighthouse 11.6 =11.6 in 1973 10.4



Summary statistics for October 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
October
2018
Diff
from
average
Highest for
October
2018
Mean for
October
2018
Diff
from
average
Lowest for
October
2018
Total for
October
2018
Average
for
October
Rank of
October
2018
Fraction of
October
average
Northern (district 91)
Cape Grim 14.7   18.1 15th 9.9   4.2 10th 17.4
Cape Grim BAPS (Comparison) 15.3 +0.9 18.9 15th 10.0 +0.8 4.3 10th 18.6 60.4 v low 31%
Cressy Research Station 18.1 +0.8 22.7 16th 5.5 +0.3 -1.5 11th 26.8 49.4 average 54%
Devonport Airport 17.2 +1.3 21.4 3rd 8.1 +0.8 1.1 28th 11.4 62.0 v low 18%
Launceston (Ti Tree Bend) 19.5 +1.4 25.4 16th 7.7 +0.7 0.0 28th 27.4 49.6 low 55%
Launceston Airport 18.2 +0.5 23.5 16th 5.9 +0.5 -2.7 28th 31.8 39.0 average 82%
Low Head 16.3 +0.9 18.4 16th 10.1 +0.5 4.0 28th 20.0 48.3 low 41%
Luncheon Hill (Forestry) 15.8 +1.0 20.2 15th 7.4 +1.3 1.3 10th 43.8 128.5 v low 34%
Marrawah 16.0 +1.0 20.3 15th 9.1 +0.9 3.0 10th 26.6 86.4 v low 31%
Scottsdale (West Minstone Road) 17.2 +0.7 23.6 16th 6.9 +1.1 -0.2 28th 40.0 80.0 low 50%
Sheffield School Farm 16.2 +0.9 20.4 15th 6.4 +0.7 0.4 28th 31.0 75.1 low 41%
Smithton Aerodrome 17.0 +0.7 19.6 15th 7.7 +0.8 0.4 24th 27.0 75.1 low 36%
Wynyard Airport 16.9 +0.7 20.0 21st 7.5 +1.3 0.6 28th 25.2 93.3 v low 27%
East Coast (district 92)
Bicheno (Council Depot) 17.5 0.0 21.5 23rd 9.5 +0.9 3.2 28th 15.9 53.8 low 30%
Fingal (Legge Street) 18.2 +0.6 23.3 30th 5.4 +0.5 -3.1 11th 25.0 53.4 low 47%
Friendly Beaches 18.9 +0.6 23.4 18th 9.1 +0.5 3.7 4th 24.0 51.0 low 47%
Lake Leake (Elizabeth River) 14.9 +1.0 22.2 16th 3.6 0.0 -3.4 28th 33.2 74.1 low 45%
larapuna (Eddystone Point) 18.1 +1.8 22.8 3rd 10.3 +1.3 4.2 28th 20.6 67.1 v low 31%
Maria Island (Point Lesueur) 16.6 -0.2 20.4 16th 10.3 +0.9 6.0 4th 15.0 29.6 low 51%
Orford (Aubin Court) 17.3 -0.1 22.5 16th 8.1 +0.9 3.0 4th 26.2 57.2 low 46%
St Helens Aerodrome 18.0 +0.4 22.0 30th 9.1 +1.0 2.3 11th 20.0 56.1 low 36%
Swan Island 16.8 +0.7 19.2 15th 11.0 +0.7 5.6 28th 20.2 45.6 low 44%
Swansea (Francis Street) 17.5   21.6 16th 7.5   0.3 4th 31.0
Midlands (district 93)
Ross (The Boulevards) 17.8 +0.6 25.9 16th 5.0 0.0 -2.8 28th 34.0 41.8 average 81%
Southeast (district 94)
Campania (Kincora) 19.3 +1.1 26.1 16th 6.6 0.0 -0.5 11th 37.2 40.2 average 93%
Cape Bruny (Cape Bruny) 16.6 +1.1 24.6 15th 9.0 +0.8 5.8 1st 39.2 66.0 v low 59%
Cape Bruny Lighthouse 15.8 +1.3 24.2 15th 9.6 +1.6 6.5 5th 42.8 83.0 v low 52%
Dennes Point 16.7   20.6 16th 9.3   5.4 4th 31.2
Dover 17.6 +1.3 26.2 15th 6.9 +0.5 2.0 5th 34.0 85.1 v low 40%
Dunalley (Stroud Point) 17.4   22.5 18th 9.8   5.9 4th 24.2
Grove (Research Station) 18.1 +0.7 25.8 15th 6.2 +0.6 -0.3 11th 22.4 58.7 v low 38%
Hobart (Ellerslie Road) 18.3 +1.3 25.4 15th 9.1 +1.3 3.2 4th 30.2 61.1 low 49%
Hobart Airport 18.5 +1.1 26.1 15th 8.3 +0.7 2.1 4th 36.2 45.3 average 80%
kunanyi (Mount Wellington Pinnacle) 9.4 +2.1 17.8 16th 1.6 +1.5 -4.3 10th 50.4 75.3 average 67%
Maatsuyker Island Lighthouse 14.1 +0.8 25.0 15th 9.0 +1.5 6.0 10th 38.8 104.9 v low 37%
Melton Mowbray (North Stockman) 18.2 +1.3 25.6 16th 5.5 -0.1 -1.9 11th 27.8 39.8 low 70%
Tasman Island 14.0 +0.2 18.2 30th 8.7 +1.1 4.7 10th 23.2 56.9 v low 41%
Tunnack Fire Station 16.1 +1.4 20.7 15th     -3.2 11th
Derwent Valley (district 95)
Bushy Park (Bushy Park Estates) 19.4 +1.6 26.2 15th 6.0 +0.2 -1.0 11th   56.7    
Maydena Post Office 17.2 +1.5 25.3 15th 5.4 +0.7 -0.1 11th 47.6 117.0 v low 41%
Ouse Fire Station 19.1 +1.2 25.6 15th 5.0 -0.3 -1.7 11th 38.6 52.7 average 73%
Central Plateau (district 96)
Butlers Gorge 14.8 +2.2 22.1 15th 2.3 -0.1 -4.2 4th 44.8 159.5 v low 28%
Lake St Clair National Park 14.8 +2.0 20.6 15th 2.6 +0.5 -3.1 4th 68.6 179.9 v low 38%
Liawenee 13.2 +1.3 19.0 16th 1.3 +0.6 -6.3 11th 28.4 72.0 low 39%
West Coast (district 97)
Cape Sorell 16.5 +2.1 21.4 16th 9.9 +1.2 4.6 10th 30.6 106.0 v low 29%
Hartz Mountain (Keoghs Pimple) 13.1 +2.2 21.3 16th 3.9 +1.3 -0.9 10th 44.4 90.7 v low 49%
Low Rocky Point 16.0   26.8 15th 9.4   5.4 25th 57.4 110.2 v low 52%
Mount Read 9.3 +1.6 15.8 15th 2.3 +1.0 -3.7 10th 170.2 376.3 v low 45%
Scotts Peak Dam 17.7 +3.1 28.1 15th 6.4 +1.3 1.4 10th 74.2 168.1 v low 44%
Strahan Aerodrome 17.7 +1.6 27.2 15th 7.6 +0.3 0.7 11th 48.2 119.3 v low 40%
Warra 14.8 +1.0 21.9 22nd 4.1 -0.2 -2.5 11th 74.4 190.3 v low 39%
King Island (district 98)
King Island Airport 17.1 +1.2 24.7 22nd 9.9 +1.0 2.4 25th 16.8 70.9 v low 24%
Flinders Island (district 99)
Flinders Island Airport 18.0 +1.2 24.3 16th 9.7 +1.1 -1.2 28th 18.6 57.8 v low 32%
Hogan Island 16.7 +0.3 23.0 16th 10.9 +0.6 7.8 25th 17.2 40.8 low 42%
Note: From 2017, information about Macquarie Island can be found in the climate summary for the Remote Islands and Antarctica

Notes

The Monthly climate summary, generally published on the first working day of each month, lists the main features of the weather in Tasmania 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 1 pm on Thursday 1 November 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 rainfall 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 rain.

The Rank indicates how rainfall this time compares with the climate record for the site, based on the decile ranking (very low rainfall 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 rain 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