Tasmania in May 2015: cool, wet in the west, dry in the east, strong winds

Cool weather was dominant in Tasmania during May, with snow to low levels early in the month and some frosty mornings. Cold fronts brought above-average rain to the west, but it was quite dry on the East Coast.

  • Day and night temperatures below average
  • A week of cold, windy weather from the 7th to the 14th
  • Above-average rain in the west
  • Below-average rain on the East Coast

May was a cool month in Tasmania, with the statewide mean maximum temperature 0.49 °C below average. It was particularly cool compared to May last year. Although temperatures were mild at the very start of the month (with several sites topping 20 °C on the 1st), a marked cold change that crossed on the 5th heralded a week of cool to cold days. There were some milder days around the middle of the month, but this was quickly followed with more cold weather from the 20th, and another cold outbreak at the very end of the month. Overnight minimum temperatures were also cool, with the statewide mean minimum temperature 0.32 °C below average. There were several cold mornings from the 12th to the 25th, with frosts in many areas on the 24th.

Westerly winds and cold fronts were a common feature during the month, ensuring rainfall was well above average in the western highlands, and also on Flinders Island. The East Coast, protected from the westerly winds, had a relatively dry month. The West Coast's Mount Read registered 558.4 mm for the month, whilst on the East Coast Bicheno registered only 9.4 mm. The State's total rain was 40% above the long-term average.

Along with the rain and snow, there were strong and damaging winds, especially early in the month. Following a windy day in the northwest on the 5th, that night Mount Wellington had a gust to 159 km/h, Tasmania's strongest May wind gust on record (just pipping the 157 km/h at Maatsuyker Island in 2007). The windy weather continued for almost a week, with Maatsuyker Island gusting to 157 km/h on the 12th. Several other sites also had their strongest-ever May wind gust, and 5 of the top 10 daily peak wind gusts for May occurred this year (although it should be noted that for most places there are less than 20 years of such records).

Further information

Media
(03) 9669 4057
Enquiries

Extremes in May 2015
Hottest day20.5 °C at Strahan Aerodrome and Swansea (Francis Street) on the 1st
Warmest days on average 16.1 °C at Bicheno (Council Depot)
Coolest days on average 5.2 °C at Mount Wellington
Coldest day 0.0 °C at Mount Wellington on the 6th and 31st
Coldest night -7.9 °C at Liawenee on the 24th
Coolest nights on average -0.5 °C at Liawenee
Warmest nights on average 10.9 °C at Hogan Island
Warmest night 14.8 °C at Flinders Island Airport on the 2nd
Warmest on average overall 13.1 °C at Hogan Island
Coolest on average overall 2.6 °C at Mount Wellington
Wettest overall 558.4 mm at Mount Read
Driest overall 9.4 mm at Bicheno (Council Depot)
Wettest day 59.2 mm at Mount Read on the 10th
Strongest wind gust 159 km/h at Mount Wellington 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 May daily rainfall
New record
(mm)
Old
record
Years of
record
Derwent Bridge 39.2 on the 6th 33.6 on the 14th in 2009 22



Record highest May total rainfall
New record
(mm)
Old
record
Years of
record
Average for
May
Richmond (Strathayr) 56.2 46.6 in 2003 25 25.8

Highest May total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Years since
higher
Average for
May
Memana (Babel Farm) 159.8 232.4 in 1974* 40 78.3
Geeveston (Cemetery Road) 144.8 175.8 in 1975* 37 71.5
Mauriceton (Jordan River) 75.6 85.6 in 1971* 35 40.7
Deal Island 116.4 200.2 in 1988* 26 73.7
Lady Barron (Franklin Parade) 146.8 182.4 in 1988* 24 72.8
Lake St Clair National Park 380.6 491.6 in 1994 21 166.7
Maydena Post Office 202.9 259.2 in 1994 21 97.1
Three Hummock Island 159.8 166.6 in 1942* 21 89.2
Bushy Park (Bushy Park Estates) 82.6 84.8 in 1994* 20 45.5

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




Record lowest May mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
May
Dover 13.6 = 13.6 in 2004 25 14.8



Record lowest May mean temperature
New record
(°C)
Old
record
Years of
record
Average for
May
Dover 9.2 = 9.2 in 2006 25 10.3



Summary statistics for May 2015
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
May
2015
Diff
from
average
Highest for
May
2015
Mean for
May
2015
Diff
from
average
Lowest for
May
2015
Total for
May
2015
Average
for
May
Rank of
May
2015
Fraction of
May
average
Northern (district 91)
Bridport (Sea View Villas) 15.1 -0.8 18.0 1st 8.4 +0.6 2.0 13th 119.7 66.1 high 181%
Burnie (Round Hill) 15.0 -0.3 18.2 1st 7.5 -0.9 2.0 17th 122.2 93.4 high 131%
Cape Grim 13.8   17.5 1st 9.7   5.9 13th 147.2
Cape Grim BAPS (Comparison) 14.0 -0.7 17.7 1st 9.8 -0.4 6.2 13th 132.0 78.9 high 167%
Cressy Research Station 14.1 -0.7 19.0 2nd 3.8 +0.4 -5.6 24th 73.6 46.2 high 159%
Devonport Airport 14.7 -0.6 18.2 14th 6.4 -0.3 1.0 23rd 97.0 74.3 average 131%
Launceston (Ti Tree Bend) 15.3 -0.5 20.0 2nd 5.0 -0.1 -2.0 23rd 101.2 63.0 high 161%
Launceston Airport 14.2 -0.6 19.1 2nd 3.8 -0.4 -4.1 23rd 83.6 52.0 high 161%
Low Head 14.8 -0.6 17.7 14th 9.4 +0.1 4.1 23rd 73.0 63.4 average 115%
Luncheon Hill (Forestry) 11.9 -1.1 18.6 1st 6.1 -0.8 1.9 24th 255.2 159.1 high 160%
Marrawah 13.9 -0.8 18.5 1st 8.8 -0.3 5.8 13th 144.6 106.2 high 136%
Scottsdale (West Minstone Road) 13.7 -1.2 17.3 1st 5.7 -0.2 0.1 23rd 139.0 97.6 high 142%
Sheffield School Farm 12.9 -0.7 17.7 1st 4.4 -1.0 -1.6 17th 133.2 91.6 high 145%
Smithton Aerodrome 14.6 -0.8 18.5 1st 6.0 -0.2 -0.9 24th 136.8 82.6 high 166%
Wynyard Airport 14.9 -0.3 18.2 1st 5.3 0.0 -1.8 24th 116.2 97.6 average 119%
East Coast (district 92)
Bicheno (Council Depot) 16.1 -0.5 19.0 9th 7.9 -0.6 2.4 24th 9.4 55.9 v low 17%
Fingal (Legge Street) 14.5 -0.8 18.6 3rd 2.4 -0.4 -5.9 23rd 38.2 49.7 average 77%
Friendly Beaches 15.6 -0.6 19.6 1st 7.4 -0.8 -0.1 24th 15.4 52.3 low 29%
Lake Leake (Elizabeth River) 10.8 -0.6 15.8 2nd 1.7 -0.4 -5.6 23rd 68.4 72.6 average 94%
Larapuna (Eddystone Point) 15.6 -0.3 18.9 3rd 9.3 -0.4 3.1 13th 51.4 64.9 average 79%
Maria Island (Point Lesueur) 14.6 -0.7 18.9 1st 8.8 -0.8 4.9 7th 11.8 33.0 v low 36%
Orford (Aubin Court) 14.6 -1.1 19.3 3rd 5.9 -0.3 -0.5 23rd 26.6 57.1 low 47%
St Helens Aerodrome 15.5 -0.6 19.5 3rd 6.8 -0.3 1.1 23rd
Swan Island 15.4 -0.5 19.2 1st 10.4 -0.4 5.8 13th 100.4 47.5 high 211%
Swansea (Francis Street) 15.5   20.5 1st 5.7   -0.4 23rd 14.6
Midlands (district 93)
Ross (The Boulevards) 13.6 -0.7 20.2 2nd 3.2 0.0 -6.0 24th 66.6 30.2 v high 221%
Southeast (district 94)
Campania (Kincora) 15.2 -0.8 20.2 1st 5.2 -0.5 -2.0 24th 45.6 31.4 high 145%
Cape Bruny (Cape Bruny) 13.5 -0.9 18.1 1st 7.6 -1.1 4.0 7th 98.8 64.4 high 153%
Cape Bruny Lighthouse 13.6 +0.1 17.5 1st 7.3 -1.0 0.5 31st 107.4 84.4 high 127%
Dennes Point 14.2   19.1 1st 7.4   3.2 24th 48.0
Dover 13.6 -1.2 19.1 1st 4.9 -0.9 0.8 24th 105.6 71.1 high 149%
Dunalley (Stroud Point) 14.7   19.3 2nd 7.9   3.4 17th 35.4
Geeveston (Cemetery Road) 13.7 -0.9 18.2 1st 4.8 +0.1 -0.8 24th 144.8 71.5 v high 203%
Grove (Research Station) 14.3 -0.8 19.6 2nd 4.0 -0.3 -3.5 17th
Hobart (Ellerslie Road) 14.6 +0.1 19.4 1st 6.8 -0.2 2.3 24th 75.8 46.4 high 163%
Hobart Airport 15.0 -0.3 20.4 1st 6.0 -0.6 -0.9 23rd 39.8 35.7 high 111%
Maatsuyker Island Lighthouse 12.1 -0.7 16.9 1st 7.8 -0.6 3.7 7th 153.6 115.1 high 133%
Melton Mowbray (North Stockman) 13.4 -0.9 18.9 1st 3.8 -0.5 -2.3 24th 64.0 30.4 v high 211%
Mount Wellington 5.2 -0.4 11.8 4th 0.0 -0.6 -5.5 8th
Tasman Island 12.4 -0.9 16.6 1st 7.5 -1.1 2.3 7th 74.2 73.8 average 101%
Tunnack Fire Station 11.4 -1.0 16.1 1st 3.1 -0.5 -3.4 24th 49.2 45.6 high 108%
Derwent Valley (district 95)
Bushy Park (Bushy Park Estates) 14.1 -0.3 19.9 1st 3.6 -0.5 -3.1 17th 82.6 45.5 high 182%
Maydena Post Office 12.1 -1.0 17.8 1st 4.1 -0.2 -2.6 17th 202.9 97.1 v high 209%
Ouse Fire Station 13.7 -1.2 20.4 1st 3.0 -0.7 -5.0 17th 94.6 34.0 v high 278%
Central Plateau (district 96)
Butlers Gorge 9.4 -0.6 14.9 1st 1.2 -0.6 -3.7 24th 293.0 159.8 v high 183%
Lake St Clair National Park 9.0 -1.2 14.8 1st 1.0 -0.7 -5.7 24th 380.6 166.7 v high 228%
Liawenee 8.3 -0.8 14.9 18th -0.5 -0.7 -7.9 24th 143.2 81.9 high 175%
West Coast (district 97)
Cape Sorell 13.7 0.0 17.8 1st 9.3 +0.2 5.8 7th 121.8 128.2 average 95%
Hartz Mountain (Keoghs Pimple) 6.8 -1.8 12.7 1st 2.1 -1.3 -2.1 8th 119.2 77.0 high 155%
Low Rocky Point 13.3   19.4 1st 8.5   5.3 13th 170.6 133.9 high 127%
Scotts Peak Dam 10.3 -1.3 16.9 1st 4.6 -1.0 0.8 8th 242.8 174.7 high 139%
Strahan Aerodrome 13.8 -0.5 20.5 1st 7.8 +0.5 5.0 13th 205.8 147.0 high 140%
Warra 10.2 -1.0 15.1 1st 3.7 -1.0 0.5 8th 343.4 161.2 v high 213%
King Island (district 98)
King Island Airport 14.9 -0.7 19.4 1st 9.4 +0.1 4.5 26th 90.2 87.4 average 103%
Flinders Island (district 99)
Flinders Island Airport 16.0 -0.3 19.9 1st 8.7 -0.3 1.4 23rd 105.3 77.6 high 136%
Hogan Island 15.4 -0.3 18.5 28th 10.9 -0.7 6.8 13th 58.2 49.8 average 117%
Antarctica and Macquarie Island (district 300)
Macquarie Island 6.3 +0.4 8.5 5th 2.7 +0.2 -4.8 24th 112.6 84.0 high 134%

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 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

Creative Commons By Attribution logo Unless otherwise noted, all maps, graphs and diagrams in this page are licensed under the Creative Commons Attribution 4.0 International Licence

Climate