Tasmania in August 2015: Cooler and drier conditions persist

Cooler and dreer weather persisted in Tasmania during August, with runs of cold days, frosty nights, and widespread snowfall across much of the state. The statewide mean temperature anomaly was the coolest since 1951 and equal 3rd coolest on record. A particularly vigorous cold front brought snow down to sea level at the start of the month, but rainfall totals were low up until the end of the month when a low pressure system saw the southeast of the state have its wettest day since the beginning of the year.

  • Below-average rain in northeast
  • Snow to sea level
  • Coolest August mean temperature since 1951
  • Coolest August days since 1978
  • Coolest August nights since 1944
  • Coolest August nights in Hobart since 1952
  • Coolest August days in Hobart since 1992

With most days below average, the August mean maximum temperature was the coolest since 1978. Days were particularly cold on the 3rd, 5th, 8th and 17th. The statewide daily mean maximum temperature for Tasmania on 3 August was 4.9°C, resulting in the coldest day for Tasmania as a whole since 9 July 1997 (4.3°C) and some sites observing their coldest August day (lowest maximum temperature) on record. The August mean minimum temperature was 4th coolest on record and the lowest since 1944. The coldest night was observed on the 8th at Liawenee on the Central Plateau, when the minimum temperature dropped to -11.1°C, which is the coldest August temperature on record for the State. Launceston had 9 mornings below zero, which is unusual but not a record (the last time the city had 9 sub-zero mornings in August was in 2008). August nights at Hobart (Ellerslie Road) were the coolest since 1952 with an average of 3.7°C while days in Hobart where the coolest since 1992.

With the generally cool conditions, several temperature records were set. Both Larapuna (Eddystone Point) and Strahan Aerodrome equalled their lowest August temperature on record. A few sites had their lowest August mean daily maximum temperature on record or their lowest August mean daily minimum temperature on record. Several other sites had their lowest mean daily maximum, lowest mean daily minimum, or lowest mean temperature (the average of the daily maximum and daily minimum) in more than 20 years. With several sites observing their lowest August mean temperature on record, the statewide mean temperature anomaly ranks as equal 3rd lowest on record, resulting in the lowest August mean temperature since 1951.

Rainfall was below average across most of Tasmania for August, particularly across the north and east where several sites reported totals less than 50 mm for the month. Rainfall was generally near average tending above average across southern parts of the state. The wettest period occurred at the end of the month as a slow moving broad, complex low pressure system over the Tasman Sea directed a southeasterly airstream over Tasmania resulting in several locations across the southeast of the state having their wettest day in over 7 months, and Judbury having its highest August daily rainfall on record. The wet finish to the month also resulted in Woodbridge, in the southeast, having its highest total August rainfall since 1994.

Temperatures were sufficiently cold that snow was reported down to low levels across much of the state on three occasions during August. A low pressure system and an associated cold front that crossed Tasmania on the 3rd brought snow down to sea level in the south of the State, including Hobart, while in the north settled snow was reported at Burnie, Devonport, Deloraine and Scottsdale, with snow flurries reported in Launceston. Snowfalls to near sea level in Tasmania are rare, especially in the north, with the best known recent event occurring in July 1986. The widespread snowfall resulted in dozens of road closures across the north, central and south, and schools were closed statewide. Another cold pool that crossed the state on the 5th brought snow down to as low as 100 meters, with settled snow again reported in the southern suburbs of Hobart. On the 17th, there were more road and school closures as a low to the southeast of Tasmania brought snow to western, southern and central parts of the State, with reports of settled snow at around 200 meters.

Further information

Media
(03) 9669 4057
Enquiries

Extremes in August 2015
Hottest day 20.0 °C at Swansea (Francis Street) on the 21st
Warmest days on average 13.4 °C at Bicheno (Council Depot)
Coolest days on average 1.2 °C at Mount Wellington
Coldest day -3.7 °C at Mount Wellington on the 5th
Coldest night -11.1 °C at Liawenee on the 8th
Coolest nights on average -3.4 °C at Liawenee
-3.4 °C at Mount Wellington
Warmest nights on average 7.8 °C at Hogan Island
Warmest night 12.9 °C at Flinders Island Airport on the 22nd
Warmest on average overall 10.3 °C at Hogan Island
Coolest on average overall -1.1 °C at Mount Wellington
Wettest overall 270.2 mm at Zeehan (West Coast Pioneers Museum)
Wettest day 50.4 mm at Judbury (Huon River) on the 29th
Strongest wind gust 148 km/h at Hogan Island on the 3rd

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 August daily rainfall
New record
(mm)
Old
record
Years of
record
Judbury (Huon River) 50.4 on the 29th 30.6 on the 25th in 2003 20



Highest August total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
August
Woodbridge 167.6 187.2 in 1994 93.7



Record lowest August daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
August
Flinders Island Airport 9.0 on the 3rd = 9.0 on the 5th in 1974 54 13.8
Burnie (Round Hill) 8.4 on the 3rd 8.5 on the 4th in 1974 50 13.2
Lake Leake (Elizabeth River) 2.4 on the 3rd 3.4 on the 7th in 1994 26 9.5
Devonport Airport 7.4 on the 3rd 8.3 on the 20th in 2001 24 13.1
Ross (The Boulevards) 5.9 on the 3rd 7.0 on the 2nd in 2004 22 12.6



Record lowest August mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
August
Mount Wellington 1.2 = 1.2 in 1970 34 2.8
Dover 11.6 11.7 in 1992 25 13.2
Devonport Airport 12.2 12.5 in 1997 23 13.1
Strahan Aerodrome 11.7 11.8 in 1994 22 13.1
Ross (The Boulevards) 10.9 11.8 in 1997 21 12.6

Lowest August mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
August
Bicheno (Council Depot) 13.4 13.2 in 1990 14.7
Lake St Clair National Park 6.4 6.2 in 1991 8.2
Burnie (Round Hill) 12.5 =12.5 in 1992 13.2
Bushy Park (Bushy Park Estates) 12.3 11.8 in 1992 13.1
Cape Bruny Lighthouse 11.2 =11.2 in 1992 11.9
Fingal (Legge Street) 12.0 11.7 in 1992 13.3
Hobart (Ellerslie Road) 12.4 12.1 in 1992 13.1
Hobart Airport 12.7 12.3 in 1992 13.5
Lake Leake (Elizabeth River) 8.1 =8.1 in 1992 9.5
Larapuna (Eddystone Point) 13.0 =13.0 in 1992 13.7
Launceston (Ti Tree Bend) 12.9 12.7 in 1992 13.8
Macquarie Island 4.3 3.7 in 1992 5.1
Scottsdale (West Minstone Road) 11.6 11.4 in 1992 12.6
Flinders Island Airport 12.9 12.5 in 1994 13.8
Marrawah 12.1 12.0 in 1994 12.8
Wynyard Airport 12.4 =12.4 in 1994 13.3
Cape Grim BAPS (Comparison) 11.7 11.6 in 1992* 12.8

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




Record lowest August temperature
New record
(°C)
Old
record
Years of
record
Average for
August
Larapuna (Eddystone Point) 0.6 on the 18th = 0.6 on the 14th in 1967 58 7.2
Strahan Aerodrome -1.8 on the 24th = -1.8 on the 11th in 2011 23 5.9



Record lowest August mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
August
Burnie (Round Hill) 4.2 = 4.2 in 1967 65 6.2
Larapuna (Eddystone Point) 6.0 = 6.0 in 1992 57 7.2
Butlers Gorge -1.7 -1.6 in 1950 54 0.1
Marrawah 5.5 5.7 in 1990 44 7.0
Bicheno (Council Depot) 4.9 5.1 in 1987 40 6.4
Wynyard Airport 2.0 2.4 in 1994 28 4.1
Dover 1.9 2.2 in 2008 25 4.0
Devonport Airport 3.5 = 3.5 in 1992 23 5.1
Cape Grim BAPS (Comparison) 6.5 7.2 in 1992 22 8.3

Lowest August mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
August
Cape Bruny Lighthouse 4.8 4.6 in 1946 6.3
Hobart (Ellerslie Road) 3.7 3.5 in 1952 5.2
Hobart Airport 3.3 =3.3 in 1963 4.7
Cape Sorell 5.8 5.1 in 1943* 7.3
Fingal (Legge Street) -0.2 -0.5 in 1994 1.3
Mount Wellington -3.4 -3.6 in 1994 -1.7

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




Record lowest August mean temperature
New record
(°C)
Old
record
Years of
record
Average for
August
Marrawah 8.8 = 8.8 in 1976 44 9.9
Bicheno (Council Depot) 9.1 9.4 in 1990 40 10.6
Launceston (Ti Tree Bend) 7.4 7.6 in 1994 32 8.8
Fingal (Legge Street) 5.9 6.1 in 1992 29 7.3
Wynyard Airport 7.2 7.4 in 1994 28 8.7
Dover 6.7 7.2 in 1990 25 8.6
Lake Leake (Elizabeth River) 3.7 4.0 in 2008 25 5.1
Lake St Clair National Park 2.3 3.0 in 1994 24 4.2
Devonport Airport 7.8 8.0 in 1992 23 9.1
Cape Grim BAPS (Comparison) 9.1 9.4 in 1992 22 10.6
Strahan Aerodrome 7.6 8.2 in 1994 22 9.5
Ross (The Boulevards) 5.8 6.6 in 1994 21 7.5

Lowest August mean temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
August
Butlers Gorge 2.7 2.5 in 1951* 4.0
Burnie (Round Hill) 8.4 =8.4 in 1971* 9.7
Cape Bruny Lighthouse 8.0 7.9 in 1976 9.1
Hobart (Ellerslie Road) 8.1 7.9 in 1976 9.1
Hobart Airport 8.0 7.5 in 1976 9.1
Scottsdale (West Minstone Road) 7.2 6.7 in 1978* 8.3
Bushy Park (Bushy Park Estates) 6.5 6.3 in 1990 7.7
Larapuna (Eddystone Point) 9.5 =9.5 in 1992 10.4
Macquarie Island 2.4 2.1 in 1992 3.3
Mount Wellington -1.1 -1.4 in 1993 0.6

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




Summary statistics for August 2015
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
August
2015
Diff
from
average
Highest for
August
2015
Mean for
August
2015
Diff
from
average
Lowest for
August
2015
Total for
August
2015
Average
for
August
Rank of
August
2015
Fraction of
August
average
Northern (district 91)
Bridport (Sea View Villas) 12.7 -1.0 16.8 27th 4.6 -1.1 -0.5 18th 53.6 90.5 average 59%
Burnie (Round Hill) 12.5 -0.7 15.6 23rd 4.2 -2.0 0.7 18th 70.2 110.6 low 63%
Cape Grim 11.3   13.5 22nd 6.5   3.3 3rd 85.0
Cape Grim BAPS (Comparison) 11.7 -1.1 13.8 27th 6.5 -1.8 3.1 3rd 86.0 97.9 average 88%
Cressy Research Station 11.8 -1.2 16.2 22nd 1.1 -1.5 -5.5 19th 29.6 70.4 low 42%
Devonport Airport 12.2 -0.9 16.0 27th 3.5 -1.6 -1.1 4th 53.2 91.1 low 58%
Launceston (Ti Tree Bend) 12.9 -0.9 16.7 27th 1.8 -1.9 -2.9 18th 50.6 87.4 low 58%
Launceston Airport 11.7 -1.4 15.1 27th 0.9 -2.3 -3.3 4th 37.6 84.3 average 45%
Low Head 12.1 -1.0 15.2 27th 5.9 -1.5 1.6 18th 39.0 83.9 low 46%
Luncheon Hill (Forestry) 10.4 -0.9 14.0 27th 2.9 -2.1 -0.9 3rd 186.8 213.7 average 87%
Marrawah 12.1 -0.7 14.3 27th 5.5 -1.5 2.2 3rd 102.4 134.4 low 76%
Scottsdale (West Minstone Road) 11.6 -1.0 16.0 27th 2.9 -1.0 -3.0 4th 93.4 121.4 average 77%
Sheffield School Farm 10.5 -1.2 14.3 27th 1.7 -2.2 -2.0 20th 97.2 136.3 average 71%
Smithton Aerodrome 12.8 -0.9 15.7 27th 3.1 -2.3 -1.8 18th 84.0 122.8 low 68%
Wynyard Airport 12.4 -0.9 15.9 22nd 2.0 -2.1 -2.3 18th 92.2 117.9 average 78%
East Coast (district 92)
Bicheno (Council Depot) 13.4 -1.3 18.2 22nd 4.9 -1.5 0.9 4th 37.3 50.7 average 74%
Fingal (Legge Street) 12.0 -1.3 17.7 21st -0.2 -1.5 -6.8 19th 31.8 60.2 low 53%
Friendly Beaches 13.1 -1.7 19.1 21st 4.3 -2.0 0.3 25th 40.4 55.8 average 72%
Lake Leake (Elizabeth River) 8.1 -1.4 13.2 21st -0.8 -1.6 -5.6 25th 51.0 78.6 average 65%
Larapuna (Eddystone Point) 13.0 -0.7 16.4 14th 6.0 -1.2 0.6 18th 40.0 71.4 low 56%
Maria Island (Point Lesueur) 12.1 -1.5 17.5 22nd 5.9 -1.7 2.2 3rd 30.6 42.5 average 72%
St Helens Aerodrome 12.9 -1.5 17.4 14th 3.7 -1.7 -0.8 4th 34.0 64.4 average 53%
Swan Island 12.7 -0.9 15.1 21st 7.1 -1.4 3.5 18th 40.4 65.4 low 62%
Swansea (Francis Street) 12.9   20.0 21st 2.7   -2.8 9th 22.3
Midlands (district 93)
Ross (The Boulevards) 10.9 -1.7 15.2 22nd 0.8 -1.5 -4.8 25th 26.4 47.4 low 56%
Southeast (district 94)
Campania (Kincora) 12.5 -1.8 17.9 21st 2.4 -1.7 -1.5 25th 51.8 53.4 average 97%
Cape Bruny (Cape Bruny) 11.5 -1.4 17.5 21st 4.9 -1.8 1.6 3rd 99.0 88.8 average 111%
Cape Bruny Lighthouse 11.2 -0.7 16.8 21st 4.8 -1.5 0.9 5th 96.0 92.9 average 103%
Dennes Point 11.6   15.8 16th 4.5   0.9 3rd 69.4
Dover 11.6 -1.6 17.5 21st 1.9 -2.1 -1.0 9th 143.6 90.5 high 159%
Dunalley (Stroud Point) 11.9   18.2 21st 4.9   0.7 3rd 34.0
Grove (Research Station) 11.7 -1.9 17.5 21st 1.3 -1.6 -3.1 8th 127.8 89.3 high 143%
Hobart (Ellerslie Road) 12.4 -0.7 18.0 21st 3.7 -1.5 1.0 3rd 63.8 53.7 high 119%
Hobart Airport 12.7 -0.8 19.4 21st 3.3 -1.4 -0.2 9th 40.0 47.0 average 85%
Melton Mowbray (North Stockman) 10.9 -1.8 16.1 21st 1.2 -1.5 -3.2 9th 50.8 51.2 average 99%
Mount Wellington 1.2 -1.6 7.1 26th -3.4 -1.7 -7.5 3rd 26.2 86.8 low 30%
Tasman Island 9.8 -1.7 14.7 22nd 4.7 -1.9 0.0 3rd 59.6 77.0 low 77%
Tunnack Fire Station 9.0 -1.6 14.1 22nd 0.4 -1.6 -6.0 24th 59.2 63.1 average 94%
Derwent Valley (district 95)
Bushy Park (Bushy Park Estates) 12.3 -0.8 17.9 21st 0.8 -1.5 -3.2 9th 80.8 54.4 high 149%
Ouse Fire Station 11.7 -2.0 17.4 21st 0.5 -1.6 -4.1 20th 84.2 64.2 average 131%
Central Plateau (district 96)
Butlers Gorge 7.1 -0.9 12.6 26th -1.7 -1.8 -6.3 20th 156.2 183.7 average 85%
Lake St Clair National Park 6.4 -1.8 11.8 26th -1.6 -1.8 -5.9 8th 213.4 239.6 average 89%
Liawenee 4.5 -2.2 10.4 25th -3.4 -2.4 -11.1 8th 78.8 135.4 low 58%
West Coast (district 97)
Cape Sorell 11.9 -0.3 15.2 26th 5.8 -1.5 2.8 8th 87.2 148.7 low 59%
Hartz Mountain (Keoghs Pimple) 4.7 -2.0 11.4 26th -0.5 -2.0 -4.3 3rd 128.4 118.9 average 108%
Low Rocky Point 11.4   14.3 20th 5.3   2.1 3rd 126.4 148.8 average 85%
Scotts Peak Dam 8.4 -2.1 15.3 26th 1.5 -2.1 -1.1 3rd 251.0 219.1 average 115%
Strahan Aerodrome 11.7 -1.4 14.6 20th 3.5 -2.4 -1.8 24th 168.6 176.6 average 95%
Warra 7.7 -2.0 11.7 26th 0.5 -2.4 -2.5 24th 244.4 237.3 average 103%
King Island (district 98)
King Island Airport 12.4 -1.3 14.5 27th 6.8 -1.0 1.4 31st 56.4 115.6 v low 49%
Flinders Island (district 99)
Flinders Island Airport 12.9 -0.9 17.8 21st 6.0 -0.6 -0.2 20th 38.6 76.3 low 51%
Hogan Island 12.7 -0.6 16.6 21st 7.8 -1.1 3.7 4th 46.6 69.1 average 67%
Antarctica and Macquarie Island (district 300)
Macquarie Island 4.3 -0.8 6.7 22nd 0.5 -1.1 -2.8 6th 85.0 74.1 high 115%

Notes

The Monthly 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 9 am on Tuesday 1 September 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