Tasmania in August 2017: cold nights, cool days, dry in the east

Cold nights were common in Tasmania during August, with several frosty mornings. Days were also mostly cooler than average, although there were some mild days in the second week. Cold fronts crossed the State on a regular basis during the month, ensuring rainfall was close to average in most areas, but it was another relatively dry month in the east.

Rain and snow into the west and south, but dry in the east

  • A number of cold fronts crossed Tasmania during August, ensuring rainfall was close to average in most areas
  • August was another relatively dry month in the east of the State, with monthly totals below 15 mm at a few sites
  • Rainfall was also below average in the Northwest and the northern Midlands
  • Several wet days around the middle of the month ensured rainfall was above average near the Derwent and Huon valleys
  • Cold outbreaks brought snow to low levels on some occasions, particularly on the 18th, 19th, 26th and 27th
  • Total rainfall for the State was 1% below the August average

Cold nights and cool days

  • Cold nights and frosts were common during August, with many sites dipping below zero on several mornings and Liawenee dropping to -9.4 °C on the 3rd
  • Sheffield had its lowest August temperature on record with −2.5 °C on the morning of the 28th
  • The State mean daily minimum temperature was 1.07 °C below average, a degree cooler than August last year but not as cold as August 2015
  • Cool temperatures also dominated by day, with the State mean daily maximum temperature 0.24 °C below average
  • There were some mild days in the second week of the month, including Swansea reaching 19.7 °C on the 10th

Cold nights for Hobart

  • The mean daily minimum temperature for Hobart (Ellerslie Road) was 4.6 °C, which is 0.6 °C below the long-term average. The coldest morning was 1.0 °C on the 3rd, and the warmest morning was on the 26th when the minimum temperature was 9.8 °C
  • Days were mostly a little warmer than average: the mean daily maximum for Hobart was 13.3 °C, which is 0.2 °C above the long-term average. The warmest day was 18.1 °C on the 10th, and the coolest day was on the 18th when the temperature only reached 9.1 °C
  • August was slightly wetter than average in the city, with Hobart receiving 65.0 mm, which is 121% of the long-term average

Further information

Media
(03) 9669 4057
Enquiries

Extremes in August 2017
Hottest day 19.7 °C at Swansea (Francis Street) on the 10th
Warmest days on average 14.7 °C at Bicheno (Council Depot)
Coolest days on average 2.3 °C at kunanyi (Mount Wellington Pinnacle)
Coldest day -2.5 °C at kunanyi (Mount Wellington Pinnacle) on the 27th
Coldest night -9.4 °C at Liawenee on the 3rd
Coolest nights on average -2.7 °C at Liawenee
Warmest nights on average 8.2 °C at Hogan Island
Warmest night 11.0 °C at Friendly Beaches on the 23rd
Warmest on average overall 10.6 °C at Hogan Island
Coolest on average overall 0.0 °C at kunanyi (Mount Wellington Pinnacle)
Wettest overall 430.0 mm at Mount Read
Driest overall 9.7 mm at Swansea (Francis Street)
Wettest day 52.6 mm at Mount Read on the 23rd
Strongest wind gust 148 km/h at Hogan Island on the 12th

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 lowest August temperature
New record
(°C)
Old
record
Years of
record
Average for
August
Sheffield School Farm -2.5 on the 28th -2.4 on the 21st in 2013 21 3.8
Mount Read -5.0 on the 27th = -5.0 on the 11th in 2005 20 0.1
A previously reported value of -7.8 °C for Lake St Clair on the 31st has since been shown to be incorrect, the result of problems with the instrument (the true value would have been several degrees warmer).


Record lowest August mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
August
Ross (The Boulevards) -0.1 0.0 in 2014 23 2.2
Melton Mowbray (North Stockman) 0.8 = 0.8 in 1998 20 2.6
Tunnack Fire Station 0.2 0.4 in 2015 20 1.9



Summary statistics for August 2017
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
August
2017
Diff
from
average
Highest for
August
2017
Mean for
August
2017
Diff
from
average
Lowest for
August
2017
Total for
August
2017
Average
for
August
Rank of
August
2017
Fraction of
August
average
Northern (district 91)
Bridport (Sea View Villas) 14.0 +0.3 16.5 10th 4.8 -0.8 -0.5 20th 85.7 89.9 average 95%
Burnie (Round Hill) 13.2 0.0 16.6 14th 5.3 -0.8 1.7 28th 101.0 110.3 average 92%
Cape Grim 12.2   15.0 15th 7.3   3.8 27th 97.0
Cape Grim BAPS (Comparison) 12.4 -0.3 15.1 13th 7.2 -1.0 3.7 27th 95.0 98.1 average 97%
Cressy Research Station 12.4 -0.5 16.3 14th 0.2 -2.3 -5.1 20th 45.2 67.7 average 67%
Devonport Airport 12.9 -0.2 17.0 14th 3.7 -1.4 -0.8 20th 70.2 90.6 average 77%
Launceston (Ti Tree Bend) 13.3 -0.5 17.4 14th 1.9 -1.8 -2.0 20th 72.4 86.3 average 84%
Launceston Airport 12.2 -0.8 16.3 14th 1.1 -1.8 -3.6 1st 58.2 80.1 average 73%
Low Head 12.7 -0.4 14.6 14th 5.8 -1.5 1.9 20th 47.2 81.3 average 58%
Luncheon Hill (Forestry) 10.6 -0.6 13.7 14th 4.2 -0.7 0.0 28th 172.0 210.4 low 82%
Marrawah 12.7 0.0 15.0 15th 6.3 -0.7 2.5 31st 92.2 133.3 low 69%
Scottsdale (West Minstone Road) 12.0 -0.6 15.7 14th 3.2 -0.7 -1.0 28th 111.2 120.1 average 93%
Sheffield School Farm 11.1 -0.5 14.5 14th 2.2 -1.6 -2.5 28th 106.6 133.6 average 80%
Smithton Aerodrome 13.2 -0.5 16.2 14th 3.8 -1.4 -1.6 28th 99.6 121.8 average 82%
Wynyard Airport 13.3 0.0 16.9 14th 2.2 -1.8 -2.7 31st 87.0 117.0 low 74%
East Coast (district 92)
Bicheno (Council Depot) 14.7 0.0 18.9 14th 5.7 -0.7 2.0 13th 17.2 50.0 low 34%
Fingal (Legge Street) 13.0 -0.3 17.4 10th -0.2 -1.4 -5.3 20th 23.4 59.7 low 39%
Friendly Beaches 14.4 -0.3 19.5 10th 5.3 -0.8 1.7 28th 18.4 51.7 v low 36%
Lake Leake (Elizabeth River) 9.1 -0.3 13.6 10th -1.2 -1.9 -5.7 28th 52.6 78.3 average 67%
larapuna (Eddystone Point) 13.9 +0.4 17.3 14th 6.3 -0.6 1.4 28th 49.8 70.8 average 70%
Maria Island (Point Lesueur) 12.7 -0.8 17.1 10th 6.8 -0.7 3.4 27th 33.8 39.7 average 85%
Orford (Aubin Court) 13.6 -0.4 18.3 10th 3.6 -0.6 -0.5 3rd 42.7 60.7 average 70%
St Helens Aerodrome 13.9 -0.4 18.1 14th 4.0 -1.2 0.3 20th 28.6 59.7 average 48%
Swan Island 13.2 -0.3 15.2 10th 7.2 -1.2 3.3 19th 57.8 63.2 average 91%
Swansea (Francis Street) 14.1   19.7 10th 3.9   -1.1 3rd 9.7
Midlands (district 93)
Ross (The Boulevards) 12.2 -0.3 16.4 14th -0.1 -2.3 -5.6 20th 34.5 45.9 average 75%
Southeast (district 94)
Campania (Kincora) 13.6 -0.6 18.5 10th 2.8 -1.2 -3.1 3rd 39.0 50.5 average 77%
Cape Bruny (Cape Bruny) 12.3 -0.6 17.6 10th 5.9 -0.7 3.4 3rd 111.8 87.9 high 127%
Cape Bruny Lighthouse 12.0 +0.1 17.5 10th 6.2 -0.1 3.3 27th 116.6 92.7 high 126%
Dennes Point 12.8   17.2 10th 5.6   1.9 3rd 82.2
Dover 12.7 -0.4 19.2 10th 2.5 -1.4 -0.6 2nd 119.4 90.5 high 132%
Dunalley (Stroud Point) 12.7   18.4 10th 5.9   3.3 13th 36.8
Grove (Research Station) 12.9 -0.5 18.2 10th 1.6 -1.2 -3.0 20th 85.2 85.1 average 100%
Hobart (Ellerslie Road) 13.3 +0.2 18.1 10th 4.6 -0.6 1.0 3rd 65.0 53.5 high 121%
Hobart Airport 13.6 +0.1 18.6 10th 4.0 -0.7 -0.2 3rd 26.0 46.2 low 56%
kunanyi (Mount Wellington Pinnacle) 2.3 -0.5 8.2 9th -2.2 -0.5 -6.1 27th 41.8 83.4 low 50%
Maatsuyker Island Lighthouse 10.7 -0.5 16.4 10th 6.3 -0.2 2.6 27th 169.8 123.8 high 137%
Melton Mowbray (North Stockman) 11.8 -0.8 16.9 10th 0.8 -1.8 -4.2 3rd 55.0 50.2 average 110%
Tasman Island 10.8 -0.6 14.4 10th 5.8 -0.7 2.3 27th 84.8 74.5 average 114%
Tunnack Fire Station 9.9 -0.6 14.6 26th 0.2 -1.7 -5.5 3rd 42.4 59.9 average 71%
Derwent Valley (district 95)
Bushy Park (Bushy Park Estates) 13.3 +0.2 18.9 10th 0.7 -1.6 -3.6 3rd 48.0 54.2 average 89%
Maydena Post Office 11.0 -0.9 18.0 10th 1.3 -1.2 -1.5 1st 153.8 152.4 average 101%
Ouse Fire Station 12.7 -0.8 17.8 10th 0.3 -1.7 -5.2 3rd 96.0 64.0 high 150%
Central Plateau (district 96)
Butlers Gorge 7.8 -0.2 12.1 10th -0.6 -0.6 -4.2 28th 213.2 183.6 average 116%
Lake St Clair National Park 7.4 -0.8 11.8 9th         250.8 237.7 average 106%
Liawenee 5.9 -0.7 10.6 9th -2.7 -1.5 -9.4 3rd 104.0 133.5 average 78%
West Coast (district 97)
Cape Sorell 12.6 +0.4 15.4 10th 6.5 -0.8 3.5 27th 122.8 148.4 average 83%
Hartz Mountain (Keoghs Pimple) 5.8 -0.8 12.9 10th 0.5 -0.9 -2.7 27th 141.6 118.1 high 120%
Low Rocky Point 12.3   17.2 10th 5.8   1.6 2nd 147.6 147.7 average 100%
Mount Read 2.9 -1.2 6.5 15th -0.9 -1.0 -5.0 27th 430.0 338.2 high 127%
Scotts Peak Dam 10.0 -0.4 16.3 10th 2.4 -1.0 -0.7 3rd 241.8 219.9 average 110%
Strahan Aerodrome 12.6 -0.5 16.9 10th 4.4 -1.3 -0.7 31st 208.4 179.3 average 116%
Warra 9.0 -0.5 14.8 10th 0.8 -1.8 -3.3 3rd 263.0 233.0 high 113%
King Island (district 98)
King Island Airport 13.6 -0.1 16.7 15th 7.0 -0.8 1.8 2nd 131.8 115.7 average 114%
Flinders Island (district 99)
Flinders Island Airport 13.5 -0.3 19.1 10th 5.7 -0.9 -2.1 28th 83.4 76.0 average 110%
Hogan Island 12.9 -0.4 16.8 10th 8.2 -0.6 4.8 18th 110.8 71.0 high 156%
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 was updated on 5 September 2017, to remove a spurious record from Lake St Clair. It had been prepared based on information available at 9 am on Friday 1 September 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 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