Tasmania in July 2017: Cold nights, dry in the east

Cold weather was common in Tasmania during July, with several especially cold overnight temperatures. Rainfall totals were close to average for much of the State, but it was another month of below-average rain in the east and rainfall was above average on King Island.

Rainfall below average in the east

  • Rainfall was once again below average in the east of Tasmania, and especially near the East Coast: Bicheno reported just 7.8 mm for the month (its driest July since 1997), after having only 0.5 mm in June
  • Totals on King Island were very much above average: King Island Airport had seven days with more than 10 mm, about double the July average for such wet days
  • Rainfall was close to average over most of the rest of Tasmania; the State total rainfall was 12% below average
  • There were a number of rainfall events during the month, most notably when low pressure systems were near the State around the 4th and 18th and when cold fronts crossed on the 14th and 23rd.
  • It was wetter than the very dry June

Cold nights and cool days

Cold nights and some rain for Hobart

  • Hobart's mean minimum temperature of 3.5 °C was 1.1 °C below the long-term average, the coolest month since June 2007 and the coolest July since 1982
  • There were seven mornings when the temperature in Hobart dropped below 2 °C, above the long-term July average of about five mornings
  • Hobart's mean maximum temperature of 12.2 °C was 0.5 °C above the long-term average, a degree cooler than July last year
  • There were only three days where the temperature didn't reach 10 °C in Hobart, compared to the long-term July average of about seven such cold days
  • A total of 37.2 mm of rain fell in Hobart, below the long-term average of 52.4 mm but still the wettest month since January and well above the June total of just 6.6 mm

Further information

Media
(03) 9669 4057
Enquiries

Extremes in July 2017
Hottest day 19.0 °C at Flinders Island Airport on the 29th
Warmest days on average 14.2 °C at Bicheno (Council Depot) and Bridport (Sea View Villas)
Coolest days on average 2.7 °C at kunanyi (Mount Wellington Pinnacle) and Mount Read
Coldest day -1.4 °C at kunanyi (Mount Wellington Pinnacle) on the 26th
Coldest night -10.4 °C at Liawenee on the 3rd
Coolest nights on average -3.1 °C at Liawenee
Warmest nights on average 8.7 °C at Hogan Island
Warmest night 11.3 °C at Swan Island on the 23rd and Hogan Island on the 30th
Warmest on average overall 11.0 °C at Hogan Island
Coolest on average overall 0.4 °C at kunanyi (Mount Wellington Pinnacle)
Wettest overall 429.0 mm at Mount Read
Driest overall 7.8 mm at Bicheno (Council Depot)
Wettest day 60.0 mm at Mount Read on the 6th
Strongest wind gust 128 km/h at Hogan Island on the 20th

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


Lowest July total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Average for
July
Bicheno (Council Depot) 7.8 5.4 in 1997 51.7



Lowest July mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
July
Bushy Park (Bushy Park Estates) 10.3 10.2 in 1984 11.2
Maydena Post Office 9.2 9.0 in 1995 10.6



Record lowest July temperature
New record
(°C)
Old
record
Years of
record
Average for
July
Lake St Clair National Park * -7.6 on the 3rd -7.2 on the 23rd in 1994 26 0.0
Ross (The Boulevards) * -7.6 on the 1st -6.6 on the 10th in 2013 24 1.5
Friendly Beaches -0.9 on the 12th = -0.9 on the 24th in 2009 21 5.7

* For Lake St Clair National Park and Ross (The Boulevards), this was also the lowest temperature for any month



Record lowest July mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
July
Fingal (Legge Street) -1.9 -1.5 in 1995 31 0.6
Melton Mowbray (North Stockman) -0.4 0.1 in 2010 20 2.1
Sheffield School Farm 1.9 2.0 in 1997 20 3.4

Lowest July mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
July
Bushy Park (Bushy Park Estates) -0.3 -0.7 in 1954* 1.5
Hobart (Ellerslie Road) 3.5 3.1 in 1982 4.6
Hobart Airport 3.0 2.5 in 1982 4.1
Orford (Aubin Court) 2.4 =2.4 in 1985 3.6
Bicheno (Council Depot) 5.2 4.5 in 1995 6.1
Launceston (Ti Tree Bend) 0.7 0.2 in 1995 2.4
Ross (The Boulevards) -0.2 -0.3 in 1995 1.5
larapuna (Eddystone Point) 6.0 5.9 in 1997 6.9

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




Record lowest July mean temperature
New record
(°C)
Old
record
Years of
record
Average for
July
Maydena Post Office 5.1 5.2 in 2008 24 6.5
Melton Mowbray (North Stockman) 5.2 5.3 in 2008 20 6.7
Sheffield School Farm 6.1 = 6.1 in 1997 20 7.1

Lowest July mean temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
July
Bushy Park (Bushy Park Estates) 5.0 4.6 in 1982 6.3
Fingal (Legge Street) 5.0 4.6 in 1995 6.4
Ross (The Boulevards) 5.5 4.7 in 1995 6.4
Launceston (Ti Tree Bend) 6.6 =6.6 in 1997 7.5



Summary statistics for July 2017
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
July
2017
Diff
from
average
Highest for
July
2017
Mean for
July
2017
Diff
from
average
Lowest for
July
2017
Total for
July
2017
Average
for
July
Rank of
July
2017
Fraction of
July
average
Northern (district 91)
Bridport (Sea View Villas) 14.2 +0.9 16.2 29th 4.7 -0.7 1.0 28th 91.8 81.1 average 113%
Burnie (Round Hill) 12.7 -0.1 14.3 18th 5.6 -0.4 2.7 1st 101.6 123.7 average 82%
Cape Grim 12.3   14.1 25th 8.1   5.2 21st 150.6
Cape Grim BAPS (Comparison) 12.5 -0.1 13.9 29th 7.9 -0.3 5.5 20th 156.0 110.7 high 141%
Cressy Research Station 11.1 -0.8 14.4 25th -0.7 -2.4 -6.1 1st 66.8 64.3 average 104%
Devonport Airport 12.8 0.0 15.2 28th 3.6 -1.1 -0.8 11th 95.2 96.9 average 98%
Launceston (Ti Tree Bend) 12.5 -0.2 14.8 19th 0.7 -1.7 -3.3 3rd 88.2 79.0 average 112%
Launceston Airport 11.3 -0.5 13.9 28th 0.4 -1.8 -5.0 1st 73.0 65.3 average 112%
Low Head 12.7 -0.1 14.6 26th 6.2 -0.7 2.3 27th 67.0 75.7 average 89%
Luncheon Hill (Forestry) 9.9 -0.7 11.9 25th 4.7 -0.3 2.3 21st 213.2 198.7 average 107%
Scottsdale (West Minstone Road) 11.5 -0.5 13.8 3rd 2.8 -0.9 -1.4 27th 112.6 118.1 average 95%
Sheffield School Farm 10.3 -0.6 13.1 25th 1.9 -1.5 -1.7 1st 170.2 132.9 average 128%
Smithton Aerodrome 12.8 -0.3 15.3 25th 3.8 -0.9 -2.1 21st 109.6 119.1 average 92%
Wynyard Airport 12.7 0.0 15.4 25th 2.3 -1.2 -2.3 12th 106.0 132.0 average 80%
East Coast (district 92)
Bicheno (Council Depot) 14.2 +0.1 17.0 25th 5.2 -0.9 1.8 12th 7.8 51.7 v low 15%
Fingal (Legge Street) 11.8 -0.4 15.8 25th -1.9 -2.5 -7.2 1st 24.4 55.4 low 44%
Friendly Beaches 13.6 -0.2 15.9 25th 4.5 -1.2 -0.9 12th 13.4 44.0 low 30%
Lake Leake (Elizabeth River) 8.3 -0.3 11.8 29th -1.2 -1.4 -6.7 1st 40.8 76.8 low 53%
larapuna (Eddystone Point) 13.5 +0.5 16.0 29th 6.0 -0.9 1.2 27th 52.8 74.9 average 70%
Maria Island (Point Lesueur) 12.3 -0.4 15.7 25th 6.7 -0.7 3.6 1st 21.0 33.3 low 63%
Orford (Aubin Court) 12.4 -0.7 15.7 25th 2.4 -1.2 -1.7 3rd 20.2 55.8 low 36%
St Helens Aerodrome 13.5 0.0 15.8 28th 3.0 -1.9 -0.5 27th 17.4 46.8 v low 37%
Swan Island 13.2 0.0 16.4 29th 7.8 -0.6 4.6 27th 57.8 69.5 average 83%
Swansea (Francis Street) 13.4   16.6 29th 2.4   -2.8 1st 10.4
Midlands (district 93)
Ross (The Boulevards) 11.0 -0.3 13.7 25th -0.2 -1.7 -7.6 1st 30.8 40.1 average 77%
Southeast (district 94)
Campania (Kincora) 12.7 -0.4 16.4 22nd 1.5 -1.9 -3.2 1st 29.6 37.4 average 79%
Cape Bruny (Cape Bruny) 11.4 -0.7 14.9 25th 5.8 -0.8 3.5 12th 76.8 75.9 average 101%
Cape Bruny Lighthouse 11.4 +0.1 14.7 29th 6.0 -0.2 3.8 12th 81.8 95.2 average 86%
Dennes Point 11.9   15.5 25th 5.2   2.0 12th 40.0
Dover 11.7 -0.6 15.5 22nd 2.2 -1.4 -0.8 12th 99.0 87.5 average 113%
Dunalley (Stroud Point) 12.1   15.3 25th 5.5   1.4 1st 39.2
Grove (Research Station) 11.6 -0.6 16.4 29th 0.8 -1.1 -4.2 1st 62.6 68.8 average 91%
Hobart (Ellerslie Road) 12.2 +0.5 15.8 25th 3.5 -1.1 0.7 3rd 37.2 52.4 average 71%
Hobart Airport 12.6 +0.1 15.4 25th 3.0 -1.1 -0.9 3rd 28.4 43.1 average 66%
kunanyi (Mount Wellington Pinnacle) 2.7 +0.3 6.3 3rd -1.9 -0.3 -4.5 1st 52.6 70.0 average 75%
Maatsuyker Island Lighthouse 10.8 -0.2 13.8 28th 6.9 +0.2 4.1 20th 135.2 128.7 average 105%
Melton Mowbray (North Stockman) 10.9 -0.5 14.5 22nd -0.4 -2.5 -5.5 8th 23.6 33.9 average 70%
Tasman Island 10.4 -0.5 13.4 18th 6.2 -0.4 2.9 20th 60.8 70.1 average 87%
Tunnack Fire Station 9.1 -0.4 12.7 25th -0.3 -1.9 -5.8 1st 36.4 43.3 average 84%
Derwent Valley (district 95)
Bushy Park (Bushy Park Estates) 10.3 -0.9 16.0 29th -0.3 -1.8 -3.4 2nd 29.0 49.9 low 58%
Maydena Post Office 9.2 -1.4 15.4 29th 1.0 -1.3 -1.6 2nd 129.2 115.7 average 112%
Ouse Fire Station 10.1 -1.6 15.5 29th -1.1 -2.3 -5.0 1st 33.0 50.2 average 66%
Central Plateau (district 96)
Butlers Gorge 7.0 0.0 9.1 29th -0.7 -0.4 -6.6 2nd 190.2 175.4 average 108%
Lake St Clair National Park 6.3 -1.0 9.2 25th -0.7 -0.7 -7.6 3rd 187.4 208.4 average 90%
Liawenee 5.4 -0.2 8.5 1st -3.1 -1.5 -10.4 3rd 105.4 113.9 average 93%
West Coast (district 97)
Cape Sorell 12.3 +0.5 13.8 31st 7.3 +0.2 3.7 3rd 115.0 153.9 low 75%
Hartz Mountain (Keoghs Pimple) 5.4 -0.6 10.2 29th 0.7 -0.7 -1.5 1st 121.8 102.1 high 119%
Low Rocky Point 11.9   14.2 29th 6.2   3.4 3rd 159.0 146.2 average 109%
Mount Read 2.7 -1.1 6.9 3rd -0.6 -0.8 -2.6 20th 429.0 406.7 average 105%
Scotts Peak Dam 8.7 -0.6 12.4 31st 2.5 -0.8 -0.2 12th 220.4 199.0 high 111%
Strahan Aerodrome 12.3 +0.1 14.1 2nd 5.0 -0.2 -2.0 3rd 187.0 173.7 average 108%
Warra 8.2 -0.4 13.2 29th 1.2 -1.4 -2.1 3rd 171.0 174.3 average 98%
King Island (district 98)
King Island Airport 13.3 0.0 15.5 25th 7.1 -0.5 1.9 21st 169.6 116.3 high 146%
Flinders Island (district 99)
Flinders Island Airport 13.5 +0.1 19.0 29th 5.6 -0.7 -2.2 3rd 86.0 82.3 average 104%
Hogan Island 13.3 +0.4 17.6 29th 8.7 -0.2 6.4 20th 55.4 75.3 low 74%
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 10 am on Tuesday 1 August 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.

From 2017, information about Macquarie Island can be found in the climate summary for the Remote Islands and Antarctica

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