Tasmania in July 2013: Warm, wet and windy

Averaged across Tasmania, maximum temperatures were highest on record for July, with minimum temperatures also warmer than average. Several sites broke high and low temperature records. There were a few heavy rainfall events in July, which helped raise overall monthly totals to above average in most areas.

  • Tasmania's warmest July days on record
  • Hobart's warmest July on record
  • A record high 18.4 °C at Launceston
  • A record low -12.2 °C at Liawenee
  • A record 100 mm at Mount Wellington
  • Above average rainfall in most areas

Wet and windy start to July

The first 5 days of July were wet and windy as a series of cold fronts crossed Tasmania. On the 1st, the passage of a cold front produced wind gusts of 133 km/h at Maatsuyker Island, 131 km/h gusts at Mount Wellington and 98 km/h gusts in Hobart. There were reports of roof damage, with trees brought down across roads and power outages affecting thousands of premises in the Hobart area.

A cold front overnight on the 4th produced daily falls of up to 50 mm in the north and west, with a few sites recording their highest July daily rainfall on record. Showers fell as snow across the Central Highlands, on Mount Wellington and Ben Lomond, with thunderstorms and hail also observed in the west, north and south. Winds strengthened as another cold front crossed during the day on the 5th, with gusts of 161 km/h recorded at Maatsuyker Island, 137 km/h at Cape Grim, 117 km/h at Flinders Island and 98 km/h in Devonport.

A few heavy rainfall events

There were a few heavy rainfall events in July, which helped raise monthly totals to above average in most areas. Tea Tree (The Point) in the southeast had its wettest July on record, with several other sites observing their wettest July in at least 20 years.

On the 14th, a low pressure system and trough generated heavy rain across northwest Tasmania with daily rainfall totals approaching 90 mm at some sites. 84.8 mm was recorded at Yolla, and 79.8 mm at Mole Creek over the 24 hours to 9am on the 15th. The heavy rain followed falls of up to around 40 mm on the 13th, resulting in the minor flooding of roads, and a landslide which closed the Old Bass Highway between Ulverstone and Penguin.

An approaching low pressure system and trough brought rain to the north and west overnight on the 18th, with heavy falls about elevated areas. Liawenee in the Central Plateau recorded 70.6 mm over the 24 hours to 9am on the 19th, its wettest July day on record. Other areas in the north observed falls of up to 40 mm.

A low pressure system to the east of Tasmania brought gusty winds and persistent rain to the southeast on the 21st and morning of the 22nd. 24 hour rainfall totals generally ranged from 30 to 60 mm across the southeast, with a handful of sites breaking July daily rainfall records. Mount Wellington recorded the highest total, with 100.4 mm over the 24 hours to 9am on the 22nd, its wettest July day on record.

The wettest overall was Lake Margaret Power Station with 339.2 mm for July, whilst the driest overall was Ross (Macquarie River) with 39.0 mm

Record warmth and record cold

The first few days of July were unusually warm, with a handful of sites recording their highest July minimum temperature on record on the 1st or 2nd. In Devonport, the temperature remained above 10 °C every night between the 1st and 4th, which has never before happened in July. A few sites, including Ross and Bicheno also observed their warmest July day on record on the 1st.

Following the initial warmth, day-time temperatures dropped to below average from the 5th and minimum temperatures from the 7th. The morning of the 9th was particularly cold, Liawenee's temperature dropping to -12.2 °C, its lowest temperature ever recorded and Tasmania's second-coldest July temperature on record. Note that this record is not listed in the records table below as Liawenee only has 13 years of temperature records. The following morning the temperature dropped to -6.6 °C at Ross, its lowest July temperature on record.

Temperatures rose again from mid-month, with several sites recording their highest July temperature on record on the 18th and 19th, including Launceston with 18.4 °C. Bushy Park's maximum of 19.8 °C on the 19th was the warmest day of the month, and just under the site's July record of 20.0 °C set on 2 July 1985. It was also warm that morning, with some sites observing their highest July minimum temperature on record, including Burnie and Strahan.

Warmest July days on record overall

Overall, July temperatures were warmer than average, by 1 to 2 degrees for minimum temperatures and by up to 2 degrees for maximum temperatures. Averaged across Tasmania as a whole, mean July maximum temperatures were 1.3 °C above average, the highest on record. Temperature records were broken at several sites for highest July mean temperature on record (average of the maximum and minimum temperature), highest July mean maximum temperature on record, and highest July mean minimum temperature on record. Launceston and Wynyard had their highest July mean temperature on record in at least 20 years.

Hobart's warmest July on record

Hobart's July mean temperature (average of the maximum and minimum temperature) was 10.0  °C, its highest July mean temperature on record. This was due to more warmer than average days and nights than cold: the temperature only dropped below 5 °C on 11 mornings compared to the July average of 18, and rose above 15 °C on 11 days, compared to the July average of only 3.

The mean minimum temperature of 6.2 °C is 1.6 °C above average and the warmest since 2005. Day-time temperatures were also warmer than usual, the mean maximum temperature of 13.7 °C being 2.0 °C above average, and just 0.2 °C shy of the July record. The warmest day was on the 19th when Hobart reached 18.3 °C, its warmest July day in 20 years (since 18.8 °C on 3 July 1993).

Hobart's wettest day was on the 21st when 43 mm was recorded over the 24 hours to 9am on the 22nd. This was Hobart's wettest day since 78.8 mm was recorded on 13 April 2011, and 83% of Hobart's average July rainfall. This rainfall event, in addition to 25 mm on the 6th, helped raise Hobart's overall July total to 101.4 mm, its wettest July in 21 years.

2013 so far

The first 7 months of 2013 have been warmer than usual in Tasmania, by up to around 1 °C above average for both maximum and minimum temperatures. Rainfall totals have generally been close to average, but below average in the Derwent Valley and Central Plateau districts.

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Extremes in July 2013
Hottest day 19.8 °C at Bushy Park (Bushy Park Estates) on the 19th
Warmest days on average 15.3 °C at Bicheno (Council Depot)
Coolest days on average 3.8 °C at Mount Wellington
Coldest day -3.0 °C at Mount Wellington on the 6th
Coldest night -12.2 °C at Liawenee on the 9th
Coolest nights on average -0.8 °C at Liawenee
Warmest nights on average 9.3 °C at Cape Grim, Cape Grim BAPS (Comparison), Swan Island
Warmest night 14.4 °C at Flinders Island Airport on the 19th
Warmest on average overall 11.6 °C at Cape Grim BAPS (Comparison) and Swan Island
Coolest on average overall 1.8 °C at Mount Wellington
Wettest overall 339.2 mm at Lake Margaret Power Station
Driest overall 39.0 mm at Ross (Macquarie River)
Wettest day 100.4 mm at Mount Wellington on the 22nd
Highest wind gust 161 km/h at Maatsuyker Island Lighthouse on the 5th

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 July daily rainfall
Highest daily rainfall
in July 2013 (mm)
Previous wettest
for July
Years of
record
City of Melbourne Bay 48.0 on the 5th 43.0 on the 21st in 2000 78
Mount Wellington 100.4 on the 22nd 78.0 on the 3rd in 1990 33
Three Hummock Island 55.8 on the 5th 35.1 on the 15th in 1942 22
Nierinna (Cuthberts Road) 49.2 on the 22nd 35.4 on the 27th in 2000 21
Low Rocky Point 60.4 on the 4th 54.0 on the 25th in 2003 20
Yarlington (Blacks Pinnacle) 52.4 on the 22nd 29.4 on the 2nd in 2005 20



Record highest total July rainfall
Total rainfall
for July 2013 (mm)
Previous wettest
for July
Years of
record
Average for
July
Tea Tree (The Point) 103.0 97.8 in 1990 28 43.1
Richmond (Strathayr) 101.6 95.4 in 1990 23 40.1
Nierinna (Cuthberts Road) 150.8 122.6 in 2011 20 76.5
Yarlington (Blacks Pinnacle) 135.0 75.2 in 1996 20 51.1

Highest total July rainfall for at least 20 years
Total rainfall
for July 2013 (mm)
Most recent July
at least this wet
Years since
wetter
Average for
July
City of Melbourne Bay 226.6 265.2 in 1974 39 138.6
King Island Airport 186.6 214.8 in 1975 38 114.0
Yolla (Sea View) 291.6 382.4 in 1975 38 192.3
Colebrook (The Meadows) 108.8 112.3 in 1975* 34 50.7
Huonville (Tutton Avenue) 163.4 226.0 in 1974* 31 74.9
Bull Bay (Lauriston) 98.0 124.6 in 1990 23 54.5
Dover 165.6 204.0 in 1990 23 86.1
Hobart Airport 75.6 98.0 in 1990 23 43.0
Opossum Bay 82.6 105.8 in 1990 23 45.6
Orford (Aubin Court) 86.6 103.0 in 1990 23 57.0
Woodbridge 134.0 142.3 in 1966* 23 81.5
Fort Direction 82.4 86.8 in 1990* 21 44.7
Hobart (Ellerslie Road) 99.2 103.6 in 1992 21 52.1
Scottsdale (West Minstone Road) 170.4 172.4 in 1992 21 117.5
Taroona (Taroona Crescent) 81.6 91.6 in 1992* 20 53.3

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




Record highest July temperature
Highest temperature
in July 2013 (°C)
Previous warmest
for July
Years of
record
Average for
July
Bicheno (Council Depot) 19.4 on the 1st 19.0 on the 4th in 1994 39 14.0
Launceston (Ti Tree Bend) 18.4 on the 18th 17.6 on the 30th in 1996 31 12.6
Geeveston (Cemetery Road) 18.9 on the 19th 18.1 on the 23rd in 2000 27 12.1
Dover 18.5 on the 19th = 18.5 on the 23rd in 2000 24 12.3
Maydena Post Office 17.9 on the 19th 17.4 on the 27th in 2002 21 10.6
Cape Grim BAPS (Comparison) 16.6 on the 15th 16.0 on the 6th in 2005 20 12.5
Ross (The Boulevards) 17.6 on the 1st 16.0 on the 13th in 2002 20 11.2



Record highest July mean daily maximum temperature
Mean daily maximum
temperature
for July 2013 (°C)
Previous warmest
for July
Years of
record
Average for
July
Cape Sorell 13.5 13.2 in 1922 73 11.7
Flinders Island Airport 14.6 14.4 in 1988 51 13.3
Marrawah 13.5 = 13.5 in 2001 42 12.3
Mount Wellington 3.8 = 3.8 in 2010 32 2.3
Devonport Airport 13.6 = 13.6 in 2005 21 12.7

Highest July mean daily maximum temperature for at least 20 years
Mean daily maximum
temperature
for July 2013 (°C)
Most recent July
at least this warm
Years since
warmer
Average for
July
Orford (Aubin Court) 14.2 14.4 in 1979 34 13.0
Fingal (Legge Street) 13.4 13.6 in 1993 20 12.2
Lake Leake (Elizabeth River) 9.6 9.7 in 1993 20 8.5

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




Record highest July daily minimum temperature
Highest daily minimum
temperature
in July 2013 (°C)
Previous warmest
for July
Years of
record
Average for
July
Flinders Island Airport 14.4 on the 19th 14.2 on the 3rd in 1985 52 6.2
Burnie (Round Hill) 12.7 on the 19th = 12.7 on the 6th in 2005 49 5.9
Geeveston (Cemetery Road) 11.6 on the 1st 11.2 on the 19th in 2002 27 2.2
Dover 12.4 on the 1st 12.3 on the 19th in 2002 24 3.5
Strahan Aerodrome 13.2 on the 19th 11.6 on the 29th in 2011 22 5.1
Maydena Post Office 9.2 on the 29th 9.1 on the 5th in 1999 21 2.2
Cape Grim BAPS (Comparison) 12.7 on the 2nd = 12.7 on the 20th in 2009 20 8.2
Ross (The Boulevards) 10.1 on the 1st = 10.1 on the 20th in 2009 20 1.4



Record lowest July temperature
Lowest temperature
in July 2013 (°C)
Previous coolest
for July
Years of
record
Average for
July
Ross (The Boulevards) -6.6 on the 10th -6.5 on the 27th in 2011 20 1.4



Record highest July mean daily minimum temperature
Mean daily minimum
temperature
for July 2013 (°C)
Previous warmest
for July
Years of
record
Average for
July
Maatsuyker Island Lighthouse 8.1 = 8.1 in 2010 77 6.6
Cape Sorell 9.2 8.8 in 1928 73 7.1
Hobart Airport 5.6 5.3 in 1988 55 4.1
Marrawah 8.2 8.1 in 2005 42 6.7
Bicheno (Council Depot) 7.6 7.3 in 2007 38 6.1
Mount Wellington -0.3 = -0.3 in 2001 32 -1.6
Strahan Aerodrome 7.3 7.0 in 2002 21 5.1
Maydena Post Office 3.5 = 3.5 in 2005 20 2.2

Highest July mean daily minimum temperature for at least 20 years
Mean daily minimum
temperature
for July 2013 (°C)
Most recent July
at least this warm
Years since
warmer
Average for
July
Lake Leake (Elizabeth River) 1.6 1.8 in 1993 20 0.1
Launceston (Ti Tree Bend) 4.0 4.5 in 1993 20 2.2

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




Record highest July mean temperature
Mean daily
temperature
for July 2013 (°C)
Previous warmest
for July
Years of
record
Average for
July
Hobart (Ellerslie Road) 10.0 9.9 in 1988 131 8.1
Cape Bruny Lighthouse 10.3 = 10.3 in 1988 89 8.7
Cape Sorell 11.3 10.8 in 1928 73 9.4
Hobart Airport 9.8 = 9.8 in 2002 55 8.3
Marrawah 10.9 10.7 in 2005 42 9.5
Bicheno (Council Depot) 11.4 11.2 in 2001 38 10.1
Mount Wellington 1.8 1.7 in 2010 32 0.4
Fingal (Legge Street) 7.5 7.4 in 1993 27 6.3
Geeveston (Cemetery Road) 8.8 = 8.8 in 2005 26 7.1
Strahan Aerodrome 10.3 10.0 in 2002 21 8.6

Highest July mean temperature for at least 20 years
Mean daily
temperature
for July 2013 (°C)
Most recent July
at least this warm
Years since
warmer
Average for
July
Lake Leake (Elizabeth River) 5.6 5.8 in 1993 20 4.3
Launceston (Ti Tree Bend) 8.6 9.0 in 1993 20 7.4
Wynyard Airport 9.1 9.2 in 1993 20 8.0



Summary statistics for July 2013
Maximum temperatures
for July
(°C)
Minimum temperatures
for July
(°C)
Rainfall
for July
(millimetres)
Mean for
July
2013
Diff
from
average
Highest for
July
2013
Mean for
July
2013
Diff
from
average
Lowest for
July
2013
Total for
July
2013
Average
for
July
Rank of
July
2013
Fraction of
July
average
Northern (district 91)
Bridport (Sea View Villas) 13.9 +0.7 17.7 18th 6.4 +1.0 0.0 7th 108.5 74.3 high 146%
Burnie (Round Hill) 13.9 +1.2 15.9 18th 7.4 +1.5 2.2 7th 153.8 123.3 high 125%
Burnie NTC AWS 13.0   15.8 1st 8.0   3.3 7th
Cape Grim 13.5   16.3 18th 9.3   4.2 9th 157.6
Cape Grim BAPS (Comparison) 13.8 +1.3 16.6 15th 9.3 +1.1 4.6 9th 148.8 104.0 high 143%
Cressy Research Station 12.5 +0.7 16.7 1st 2.4 +0.9 -5.3 9th 100.4 59.4 high 169%
Devonport Airport 13.6 +0.9 16.2 24th 5.5 +0.9 -0.6 7th 129.0 95.2 high 136%
Launceston (Ti Tree Bend) 13.4 +0.8 18.4 18th 4.0 +1.8 -3.1 9th 115.6 75.7 high 153%
Launceston Airport 12.4   16.8 18th 3.4   -4.3 9th 96.2
Low Head 13.5 +0.8 15.9 18th 7.5 +0.7 2.2 7th 127.2 71.3 high 178%
Luncheon Hill (Forestry) 11.1 +0.5 14.3 12th 6.2 +1.3 0.8 7th 304.6 189.8 v high 160%
Marrawah 13.5 +1.2 16.8 15th 8.2 +1.5 3.0 9th 207.6 138.5 high 150%
Scottsdale (West Minstone Road) 12.5 +0.5 17.1 18th 5.2 +1.5 -1.5 7th 170.4 117.5 high 145%
Sheffield School Farm 11.5 +0.7 14.5 23rd 3.8 +0.5 -2.0 7th 203.0 120.7 high 168%
Smithton Aerodrome 14.0 +0.9 16.9 15th 5.5 +0.9 -2.2 9th 155.8 110.8 high 141%
Wynyard Airport 13.6 +0.9 16.1 15th 4.5 +1.1 -2.4 9th 170.2 130.6 high 130%
East Coast (district 92)
Bicheno (Council Depot) 15.3 +1.3 19.4 1st 7.6 +1.5 1.6 10th 42.2 52.0 average 81%
Fingal (Legge Street) 13.4 +1.2 18.3 1st 1.6 +1.1 -5.9 9th 51.8 55.3 average 94%
Friendly Beaches 14.7 +1.0 18.6 19th 7.3 +1.7 1.1 10th 66.2 44.1 average 150%
Lake Leake (Elizabeth River) 9.6 +1.1 13.9 18th 1.6 +1.5 -6.7 10th 99.3 77.2 high 129%
Larapuna (Eddystone Point) 14.6 +1.5 16.8 18th 8.3 +1.2 2.5 7th 66.4 75.1 average 88%
Maria Island (Point Lesueur) 13.6   18.0 1st 8.4   4.5 7th 59.8 34.4 v high 174%
Orford (Aubin Court) 14.2 +1.2 19.2 1st 4.3 +0.8 -1.9 10th 86.6 57.0 high 152%
Spring Bay NTC AWS 14.2   18.3 18th 6.9   2.0 10th
St Helens Aerodrome 14.5 +1.0 17.6 16th 6.0 +1.2 -0.6 7th 46.0 46.2 average 100%
Swan Island 14.0 +0.8 17.6 18th 9.3 +1.0 4.3 7th 97.2 59.0 v high 165%
Swansea (Francis Street) 14.8   19.5 1st 4.9   -2.1 9th 42.7
Midlands (district 93)
Ross (The Boulevards) 12.0 +0.8 17.6 1st 2.3 +0.9 -6.6 10th 44.2 38.3 average 115%
Southeast (district 94)
Bull Bay (Lauriston) 13.3 +0.8 18.4 1st 6.7 +0.9 2.2 7th 98.0 54.5 v high 180%
Campania (Kincora) 14.0 +0.9 18.4 1st 4.5 +1.3 -1.8 10th 98.4 37.0 v high 266%
Cape Bruny (Cape Bruny) 12.8 +0.8 18.5 19th 7.6 +1.1 3.9 6th 94.2 73.6 high 128%
Cape Bruny Lighthouse 12.7 +1.4 18.3 19th 7.7 +1.5 4.3 9th 95.3 95.4 average 100%
Dennes Point 13.3   17.7 19th 7.2   1.9 10th 102.0
Dover 13.1 +0.8 18.5 19th 4.9 +1.4 -1.2 9th 165.6 86.1 v high 192%
Dunalley (Stroud Point) 13.2   18.5 1st 7.0   1.6 10th 62.4
Geeveston (Cemetery Road) 13.2 +1.1 18.9 19th 3.9 +1.7 -2.6 10th 133.9 91.7 high 146%
Grove (Research Station) 13.4   18.8 19th 3.1   -3.4 10th 123.0 60.1 v high 205%
Hobart (Ellerslie Road) 13.7 +2.0 18.3 19th 6.2 +1.6 1.2 9th 101.4 52.1 v high 194%
Hobart Airport 14.0 +1.5 19.6 1st 5.6 +1.5 0.3 10th 75.6 43.0 v high 176%
Maatsuyker Island Lighthouse 11.9 +0.9 17.0 18th 8.1 +1.5 2.5 6th 139.4 128.6 average 108%
Melton Mowbray (North Stockman) 12.5 +1.2 16.9 29th 3.4 +1.5 -2.7 10th 89.4 33.0 v high 271%
Mount Wellington 3.8 +1.5 8.0 18th -0.3 +1.3 -5.3 9th
Tasman Island 12.0 +1.2 16.3 19th 7.8 +1.3 2.9 6th 77.2 71.5 average 108%
Tunnack Fire Station 10.2 +0.7 14.8 1st 2.0 +0.4 -5.3 9th
Derwent Valley (district 95)
Bushy Park (Bushy Park Estates) 13.4 +2.2 19.8 19th 2.0 +0.6 -3.6 10th 64.4 49.5 high 130%
Maydena Post Office 11.6 +1.0 17.9 19th 3.5 +1.3 -1.5 10th 156.6 109.5 high 143%
Ouse Fire Station 13.2 +1.6 19.2 19th 2.3 +1.3 -5.4 10th 66.8 47.4 high 141%
Central Plateau (district 96)
Butlers Gorge 8.9 +1.9 12.4 18th 1.0 +1.4 -6.7 10th
Lake St Clair National Park 8.0 +0.8 12.5 15th 0.6 +0.7 -5.7 9th 222.0 202.9 average 109%
Liawenee 6.6 +1.0 10.9 16th -0.8 +0.8 -12.2 9th 193.8 109.4 v high 177%
West Coast (district 97)
Cape Sorell 13.5 +1.8 17.7 18th 9.2 +2.1 3.9 9th 146.0 155.3 average 94%
Hartz Mountain (Keoghs Pimple) 6.2 +0.2 11.8 28th 2.3 +0.9 -1.6 6th
Low Rocky Point 13.0   16.1 18th 8.0   3.6 9th 215.2 142.8 v high 151%
Scotts Peak Dam 10.3 +1.1 15.1 19th 4.7 +1.5 0.6 7th 225.8 192.2 high 117%
Strahan Aerodrome 13.3 +1.1 18.0 18th 7.3 +2.2 1.0 9th 209.6 171.9 high 122%
Warra 9.7   16.0 19th 3.6   -1.5 10th 235.8
King Island (district 98)
King Island Airport 14.3 +1.1 17.1 18th 8.5 +1.0 1.1 9th 186.6 114.0 v high 164%
Flinders Island (district 99)
Flinders Island Airport 14.6 +1.3 19.5 18th 7.3 +1.1 -0.6 9th 79.2 82.8 average 96%
Antarctica and Macquarie Island (district 300)
Macquarie Island 4.9 0.0 7.4 19th 0.8 -0.8 -8.5 25th 99.2 72.7 high 136%

Notes

A Monthly Climate Summary is prepared to list 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, usually published in the fourth week of the month.

This statement has been prepared based on information available at 9 am on Thursday 1 August 2013. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Averages 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 being used for temperature area averages from December 2012 onwards. The major change from earlier datasets is that the ACORN-SAT dataset commences in 1910, rather than 1950, and hence rankings are calculated using a larger set of years.

Further information

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(03) 9669 4057
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