Tasmania in autumn 2015: cool overall, dry in the east

Autumn 2015 brought below-average temperatures to Tasmania, with plenty of cool days and nights through the season. It was relatively dry in the east, but rain in March and May kept most other areas close to average overall.

  • Cool days and cool nights
  • Coolest autumn since 2006
  • Below-average rain in the east
  • Near-average rain in most other areas
  • Very windy in early May

March, April and May all brought generally cool weather to Tasmania, with fewer warm days than usuaul. The mean daily maximum temperature across the State was 0.83 °C below average, the lowest since autumn 2006. As might be expected, most sites had their warmest day of autumn early in March, but the highest temperature for the State was actually on 1 April, when Flinders Island Airport reached 28 °C. The coldest days were in May in the wake of cold fronts that brought snow to low levels: Mount Wellington did not get above freezing at all on the 6th or the 31st.

Overnight minimum temperatures were also on the cool side overall, with the statewide mean daily minimum temperature 0.76 °C below average, also the coolest since 2006. A few sites had record low mean daily minimum temperature. There were some particularly cold mornings in late April, and again in the second half of May.

Rainfall was varied through the season. The west and north had a wet March, but then the whole State had a relatively dry April. May was wet in the west, but dry in the east. Overall, total autumn rainfall was close to average in most areas, but generally below average in the east. A few pockets, notbaly in the western highlands and the northeast coast, had above-average autumn total rain. The State's total rain was just 4% above average.

There were strong and gusty winds early in May. A gust to 159 km/h at Mount Wellington on 5 May was the strongest autumn gust recorded in Tasmania, and a gust to 157 km/h on Maatsuyker Island on 12 May equalled the old autumn record.

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Extremes in autumn 2015
Hottest day 28.0 °C at Flinders Island Airport on 1 Apr
Warmest days on average 18.1 °C at Launceston (Ti Tree Bend)
Coolest days on average 7.4 °C at Mount Wellington
Coldest day 0.0 °C at Mount Wellington on 6 and 31 May
Coldest night -7.9 °C at Liawenee on 24 May
Coolest nights on average 0.7 °C at Liawenee
Warmest nights on average 12.3 °C at Hogan Island
Warmest night 18.4 °C at Flinders Island Airport on 18 Mar
Warmest on average overall 14.9 °C at Hogan Island
Coolest on average overall 4.2 °C at Mount Wellington
Wettest overall 1218.2 mm at Mount Read
Driest overall 71.0 mm at Mount Morriston (Macquarie River)
Wettest day 104.2 mm at Mount Read on 6 Mar
Strongest wind gust 159 km/h at Mount Wellington on 5 May

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 autumn total rainfall
New record
(mm)
Old
record
Years of
record
Average for
autumn
Bridport (Sea View Villas) 298.9 274.1 in 2011 21 178.4

Highest autumn total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Years since
higher
Average for
autumn
Memana (Babel Farm) 255.6 437.6 in 1989* 25 193.8
Lady Barron (Franklin Parade) 253.0 297.0 in 1989* 22 193.6

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




Record lowest autumn mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
autumn
Scottsdale (West Minstone Road) 16.5 16.7 in 2011 35 18.0
Lake St Clair National Park 12.0 = 12.0 in 1995 22 13.4

Lowest autumn mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Years since
lower
Average for
autumn
Butlers Gorge 12.2 =12.2 in 1965* 32 13.2
Maatsuyker Island Lighthouse 13.4 =13.4 in 1995 20 14.5

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




Record lowest autumn mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
autumn
Dover 6.1 6.2 in 2006 25 7.3
Devonport Airport 7.7 = 7.7 in 2006 23 8.8

Lowest autumn mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Years since
lower
Average for
autumn
Burnie (Round Hill) 9.0 8.9 in 1970 45 10.2
Mount Wellington 1.0 0.6 in 1965* 31 2.3
Flinders Island Airport 9.9 9.7 in 1994 21 10.8

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




Lowest autumn mean temperature for at least 20 years
Observed
(°C)
Most recent
lower
Years since
lower
Average for
autumn
Burnie (Round Hill) 13.1 12.8 in 1969 46 13.9
Butlers Gorge 7.4 7.3 in 1965* 32 8.3
Flinders Island Airport 13.9 13.7 in 1995 20 14.8

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




Summary statistics for autumn 2015
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
autumn
2015
Diff
from
average
Highest for
autumn
2015
Mean for
autumn
2015
Diff
from
average
Lowest for
autumn
2015
Total for
autumn
2015
Average
for
autumn
Rank of
autumn
2015
Fraction of
autumn
average
Northern (district 91)
Bridport (Sea View Villas) 17.4 -0.9 24.0 6 Mar 8.6 -1.1 2.0 13 May 298.9 178.4 highest 168%
Burnie (Round Hill) 17.3 -0.4 21.6 7 Mar 9.0 -1.2 2.0 17 May 238.5 219.0 average 109%
Cape Grim 15.5   21.6 1 Apr 10.5   5.9 13 May 237.2
Cape Grim BAPS (Comparison) 15.7 -0.9 22.3 1 Apr 10.6 -1.0 6.2 13 May 234.2 192.9 high 121%
Cressy Research Station 17.4 -1.2 24.5 8 Mar 4.7 -1.1 -5.6 24 May 128.2 131.7 average 97%
Devonport Airport 17.2 -0.6 23.4 7 Mar 7.7 -1.1 1.0 20 Apr 201.7 183.1 average 110%
Launceston (Ti Tree Bend) 18.1 -1.0 23.9 9 Mar 6.9 -0.7 -2.0 23 May 182.7 154.4 average 118%
Launceston Airport 17.3 -1.3 23.5 9 Mar 5.6 -1.2 -4.1 23 May 153.8 150.3 average 102%
Low Head 17.0 -0.7 21.2 1 Mar 10.6 -0.6 4.1 23 May 206.8 169.9 high 122%
Luncheon Hill (Forestry) 14.6 -1.2 21.8 1 Apr 7.1 -1.2 1.9 24 May 436.4 347.2 high 126%
Marrawah 16.0 -1.0 22.0 1 Apr 9.5 -0.9 4.3 20 Apr 296.0 257.2 high 115%
Scottsdale (West Minstone Road) 16.5 -1.5 22.4 1 Mar 7.4 -0.5 0.1 23 May 224.0 231.9 average 97%
Sheffield School Farm 15.7 -1.0 21.2 7 Mar 5.9 -1.4 -1.6 17 May 232.4 222.6 average 104%
Smithton Aerodrome 17.0 -0.9 21.9 15 Apr 6.7 -1.1 -1.9 20 Apr 239.2 191.0 high 125%
Wynyard Airport 17.2 -0.4 22.1 4 Mar 6.5 -0.9 -1.8 24 May 229.0 218.6 average 105%
East Coast (district 92)
Bicheno (Council Depot) 18.0 -0.7 25.0 7 Mar 9.7 -0.6 2.4 24 May 148.5 172.4 average 86%
Fingal (Legge Street) 17.1 -1.3 24.1 8 Mar 4.4 -1.0 -5.9 23 May 106.8 146.1 average 73%
Friendly Beaches 17.9 -0.9 25.9 18 Mar 9.2 -0.8 -0.1 24 May 137.4 164.0 average 84%
Lake Leake (Elizabeth River) 13.4 -1.0 19.8 22 Mar 3.2 -0.9 -5.6 23 May 139.6 203.3 average 69%
Larapuna (Eddystone Point) 17.9 -0.3 23.8 18 Mar 11.2 -0.3 3.1 13 May 132.8 188.7 low 70%
Maria Island (Point Lesueur) 16.6 -1.2 24.1 11 Mar 10.4 -0.9 4.9 7 May 83.8 107.8 low 78%
St Helens Aerodrome 17.8 -0.7 25.1 1 Apr 8.9 -0.6 1.1 23 May
Swan Island 17.5 -0.7 23.3 19 Mar 12.0 -0.7 5.8 13 May 231.2 162.9 average 142%
Swansea (Francis Street) 17.5   25.5 18 Mar 7.7   -0.4 23 May 101.8
Midlands (district 93)
Ross (The Boulevards) 16.9 -1.0 23.7 22 Mar 4.8 -0.8 -6.0 24 May 110.0 100.8 average 109%
Southeast (district 94)
Campania (Kincora) 18.0 -1.0 26.9 18 Mar 6.8 -0.9 -2.0 24 May 87.0 100.0 average 87%
Cape Bruny (Cape Bruny) 15.7 -0.8 24.7 19 Mar 9.1 -1.0 4.0 7 May 202.6 173.2 high 117%
Cape Bruny Lighthouse 15.4 -0.1 24.1 19 Mar 9.2 -0.5 0.5 31 May 212.0 231.3 average 92%
Dennes Point 16.5   23.4 1 Apr 9.1   3.2 24 May 114.8
Dover 16.1 -0.8 24.0 15 Apr 6.1 -1.2 0.6 20 Apr 222.2 202.0 average 110%
Dunalley (Stroud Point) 16.9   27.0 18 Mar 9.6   3.4 17 May 112.2
Geeveston (Cemetery Road) 16.2 -1.2 25.1 19 Mar 6.1 -0.4 -0.9 20 Apr 243.2 193.5 high 126%
Grove (Research Station) 16.7 -1.4 25.7 18 Mar 5.2 -0.8 -3.5 17 May
Hobart (Ellerslie Road) 17.2 -0.1 25.7 19 Mar 8.5 -0.5 2.3 24 May 138.2 142.2 average 97%
Hobart Airport 17.6 -0.5 26.0 18 Mar 7.7 -1.0 -0.9 23 May 80.6 113.5 average 71%
Maatsuyker Island Lighthouse 13.4 -1.1 22.2 1 Apr 9.1 -0.4 3.7 7 May 299.0 308.2 average 97%
Melton Mowbray (North Stockman) 16.5 -1.0 25.8 1 Apr 5.1 -1.1 -2.3 24 May 114.4 92.3 high 124%
Mount Wellington 7.4 -1.1 14.8 19 Mar 1.0 -1.3 -5.5 8 May
Tasman Island 14.2 -0.9 21.2 1 Apr 8.9 -1.0 2.3 7 May 276.8 214.3 high 129%
Tunnack Fire Station 14.4 -1.2 23.3 8 Mar 4.0 -1.4 -3.4 20 Apr 119.2 136.1 average 88%
Derwent Valley (district 95)
Bushy Park (Bushy Park Estates) 17.5 -0.6 25.4 22 Mar 5.1 -1.1 -3.1 17 May 134.0 130.8 average 102%
Ouse Fire Station 17.3 -1.2 26.1 1 Apr 4.6 -0.9 -5.0 17 May 128.2 92.1 high 139%
Central Plateau (district 96)
Butlers Gorge 12.2 -1.0 21.2 1 Apr 2.6 -0.8 -3.7 24 May 491.6 404.4 high 122%
Lake St Clair National Park 12.0 -1.4 20.4 2 Apr 2.1 -1.0 -5.7 24 May 579.6 410.7 high 141%
Liawenee 11.3 -1.1 20.5 31 Mar 0.7 -1.2 -7.9 24 May 213.6 215.4 average 99%
West Coast (district 97)
Cape Sorell 15.3 -0.3 20.2 1 Apr 10.0 -0.3 5.8 7 May 248.6 320.4 low 78%
Hartz Mountain (Keoghs Pimple) 9.7 -1.8 18.2 1 Apr 3.4 -1.4 -2.1 8 May 301.8 219.5 v high 137%
Low Rocky Point 15.0   23.6 1 Apr 9.4   5.3 13 May 380.2 327.2 high 116%
Scotts Peak Dam 13.1 -1.8 24.0 1 Apr 6.0 -0.9 0.8 8 May 510.8 410.6 high 124%
Strahan Aerodrome 15.7 -1.1 23.6 1 Apr 8.2 -0.3 1.4 13 Apr 428.4 362.7 high 118%
Warra 12.5 -1.4 21.9 1 Apr 4.7 -1.3 -0.1 14 Apr 585.8 403.4 v high 145%
King Island (district 98)
King Island Airport 16.8 -1.0 25.3 1 Apr 10.0 -0.7 3.5 13 Apr 188.4 195.4 average 96%
Flinders Island (district 99)
Flinders Island Airport 18.0 -0.8 28.0 1 Apr 9.9 -0.9 -0.4 20 Apr
Hogan Island 17.6   26.6 1 Apr 12.3   6.8 13 May 143.4 154.4 average 93%
Antarctica and Macquarie Island (district 300)
Macquarie Island 7.4 +0.4 10.2 8 Mar 3.9 +0.3 -4.8 24 May 318.6 277.8 high 115%

Notes

The Seasonal climate summary 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. Later information, including data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

A climate summary is generally published on the first working day of each month.

This statement has been prepared based on information available at 10 am on Monday 1 June 2015. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

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.

The ACORN-SAT dataset is used for temperature area averages.

Further information

Media
(03) 9669 4057
Enquiries