Tasmania in April 2017: above average temperatures, mostly below average rain

April brought many dry, mild days to Tasmania, with the mean temperature for the month above average and rainfall below average. There were some unseasonably warm days around the 20th, but a cold outbreak on the 26th.

Another mild month

  • Daytime temperatures were above average across Tasmania, typically by around one degree
  • There were several very warm days, especially from the 5th to the 8th and again from the 18th to the 22nd
  • The 20th and 21st were especially warm and several sites set new records for late-season high temperatures, including Launceston (26.0 °C on the 21st), Devonport (22.8 °C on the 21st), Wynyard (22.5 °C on the 21st), Scottsdale (24.8 °C on the 20th), Ross (25.5 °C on the 20th), and Cape Sorell (23.5 °C on the 20th)
  • A front late on the 25th brought a cold day on the 26th and a cold morning on the 27th; the coldest since October for many sites
  • The State mean maximum temperature was 0.78 °C above average and the mean minimum temperature 0.31 °C above average, giving an overall mean temperature that was 0.54 °C above average

Rainfall below average in the west

  • Relatively few rain-bearing westerly winds meant rainfall was below average in much of Tasmania, and especially in the western highlands and in the far northwest
  • A cold front with associated low passing near the State on the 9th brought rain to most areas, as did a series of troughs and lows from the 22nd to the 27th
  • Some localised moderate falls ensured the Central North and Midlands had near-average rain for the month
  • Overall, Tasmania's total rainfall was 40% below average

A mild April in Hobart

  • It was a mild month in Hobart: a mean maximum temperature of 19.2 °C was 1.9 °C above the long-term average (but still a degree cooler than the record-setting April 2016)
  • Hobart had five consecutive days over 20 °C from the 17th to the 21st; a rare (but not unknown) occurrence so late in the season
  • The mean minimum temperature in the city was 9.8 °C, which is 0.8 °C above the long-term average
  • At 3.3 °C, Hobart's minimum temperature on the morning of the 27th was the lowest April temperature recorded in the city since 2009
  • Total rainfall for the month was 21.6 mm, less than half the long-term April average of 50.5 mm

Further information

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Extremes in April 2017
Hottest day 26.5 °C at Strahan Aerodrome on the 20th
Warmest days on average 19.7 °C at Launceston (Ti Tree Bend)
Coolest days on average 9.1 °C at Mount Read
Coldest day 0.1 °C at Kunanyi (Mount Wellington Pinnacle) and Mount Read on the 26th
Coldest night -4.6 °C at Liawenee on the 3rd
Coolest nights on average 2.7 °C at Liawenee
Warmest nights on average 13.1 °C at Hogan Island and Swan Island
Warmest night 17.4 °C at Swan Island on the 8th
Warmest on average overall 15.9 °C at Hogan Island and Swan Island
Coolest on average overall 6.6 °C at Kunanyi (Mount Wellington Pinnacle)
Wettest overall 190.0 mm at Mount Read
Wettest day 49.6 mm at Boat Harbour on the 24th
Strongest wind gust 115 km/h at Kunanyi (Mount Wellington Pinnacle) on the 28th

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 April total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Average for
April
Woodbridge 22.6 18.0 in 1945* 76.5
Three Hummock Island 30.4 19.6 in 1945* 69.8

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




Record highest April temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Cape Sorell 23.5 on the 20th 23.2 on the 1st in 2014 20 15.5



Record highest April mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Cape Sorell 17.8 = 17.8 in 2016 76 15.5



Record highest April mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Bridport (Sea View Villas) 11.2 11.1 in 2010 22 9.5



Summary statistics for April 2017
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
April
2017
Diff
from
average
Highest for
April
2017
Mean for
April
2017
Diff
from
average
Lowest for
April
2017
Total for
April
2017
Average
for
April
Rank of
April
2017
Fraction of
April
average
Northern (district 91)
Bridport (Sea View Villas)     25.0 21st 11.2 +1.7 3.2 27th 57.0 60.3 average 95%
Burnie (Round Hill) 18.6 +0.8 22.3 21st 11.4 +1.4 4.8 27th 69.4 73.0 average 95%
Cape Grim 17.5   21.6 8th 12.0   6.2 27th 29.8
Cape Grim BAPS (Comparison) 17.7 +1.1 21.8 20th 12.0 +0.6 6.1 27th 30.2 63.9 low 47%
Cressy Research Station 18.7 +0.4 24.7 21st 6.0 +0.5 -1.1 27th 67.2 42.8 high 157%
Devonport Airport 18.5 +0.8 22.8 21st 9.6 +0.9 1.9 27th 83.6 60.2 high 139%
Launceston (Ti Tree Bend) 19.7 +0.8 26.0 21st 8.0 +0.5 1.0 27th 32.2 50.8 low 63%
Launceston Airport 18.6 +0.4 25.0 21st 6.9 +0.2 0.3 27th 35.0 43.0 average 81%
Low Head 18.3 +0.6 20.9 21st 11.6 +0.5 5.8 27th 48.6 54.6 average 89%
Luncheon Hill (Forestry) 16.6 +0.9 22.9 20th 9.5 +1.4 2.1 27th 69.8 97.6 low 72%
Marrawah 17.9 +1.0 23.7 7th 10.8 +0.5 4.5 27th 74.2 83.3 average 89%
Scottsdale (West Minstone Road) 18.4 +0.4 24.8 20th 9.1 +1.1 3.9 17th 36.2 77.4 low 47%
Sheffield School Farm 16.8 +0.3 21.7 20th 7.8 +0.8 0.3 27th 89.8 66.1 high 136%
Smithton Aerodrome 18.3 +0.5 23.6 6th 7.6 -0.1 0.3 15th 61.0 58.0 average 105%
Wynyard Airport 18.4 +0.8 22.5 21st 7.8 +0.7 -0.7 27th 69.2 71.0 average 97%
East Coast (district 92)
Bicheno (Council Depot) 19.3 +0.4 25.0 6th 10.4 +0.1 6.0 27th 16.3 58.3 low 28%
Fingal (Legge Street) 19.2 +0.9 26.4 20th 4.8 -0.6 -1.7 2nd 29.4 51.1 average 58%
Friendly Beaches 19.3 +0.5 26.4 6th 10.1 +0.3 4.5 27th 26.2 47.6 low 55%
Lake Leake (Elizabeth River) 15.0 +0.8 21.9 20th 3.8 -0.4 -2.4 27th 48.0 68.2 average 70%
Larapuna (Eddystone Point) 19.2 +1.3 23.8 8th 12.4 +1.3 8.1 27th 34.4 65.1 low 53%
Maria Island (Point Lesueur) 17.9 +0.2 23.4 6th 11.8 +0.5 7.9 27th 9.4 34.1 v low 28%
Orford (Aubin Court) 18.5 +0.1 25.5 6th 8.7 +0.3 3.6 27th 23.6 55.3 low 43%
St Helens Aerodrome 19.0 +0.5 23.9 8th 9.7 +0.1 5.2 27th 18.8 54.0 v low 35%
Swan Island 18.8 +0.6 23.1 7th 13.1 +0.3 6.2 27th 43.2 48.7 average 89%
Swansea (Francis Street) 19.2   26.1 6th 8.0   3.6 3rd 25.4
Midlands (district 93)
Ross (The Boulevards) 18.5 +0.9 25.5 20th 5.0 -0.6 -2.7 27th 41.8 34.9 average 120%
Southeast (district 94)
Campania (Kincora) 19.6 +0.6 26.3 6th 7.4 0.0 1.0 27th 33.2 32.1 average 103%
Cape Bruny (Cape Bruny) 17.5 +1.0 24.0 7th 10.6 +0.6 6.2 27th 34.4 52.5 low 66%
Cape Bruny Lighthouse 17.1 +1.6 23.3 7th 10.9 +1.2 6.8 27th 34.8 78.8 v low 44%
Dennes Point 18.3   24.1 8th 10.6   5.9 27th 12.6
Dover 17.9 +1.1 25.5 8th 7.2 +0.1 2.0 27th 36.8 66.0 low 56%
Dunalley (Stroud Point) 18.7   25.9 8th 10.9   5.6 27th 19.8
Grove (Research Station) 18.3 +0.4 25.8 21st 5.6 -0.1 -0.7 27th 30.8 44.1 average 70%
Hobart (Ellerslie Road) 19.2 +1.9 25.5 6th 9.8 +0.8 3.3 27th 21.6 50.3 low 43%
Hobart Airport 19.2 +1.0 25.5 8th 9.1 +0.3 3.9 27th 17.8 40.8 low 44%
Kunanyi (Mount Wellington Pinnacle) 9.9 +1.5 17.3 20th 3.3 +1.1 -3.0 27th 48.2 84.8 low 57%
Maatsuyker Island Lighthouse 15.2 +0.7 23.4 20th 11.0 +1.5 6.7 27th 80.0 107.6 low 74%
Melton Mowbray (North Stockman) 18.2 +0.8 24.2 20th 5.8 0.0 -2.2 27th 27.0 27.8 average 97%
Tasman Island 16.1 +1.0 23.2 20th 10.9 +1.0 5.7 27th 35.4 62.5 low 57%
Tunnack Fire Station 16.3 +0.9 23.3 6th 4.8 -0.4 -3.8 27th 27.2 41.1 average 66%
Derwent Valley (district 95)
Bushy Park (Bushy Park Estates) 19.4 +1.4 25.9 21st 5.4 -0.7 -1.4 27th 15.4 45.6 low 34%
Maydena Post Office 16.9 +0.9 24.9 7th 6.0 +0.5 -1.0 27th 30.4 77.1 v low 39%
Ouse Fire Station 18.6 +0.2 24.9 7th 5.0 +0.1 -1.0 27th 32.2 30.0 average 107%
Central Plateau (district 96)
Butlers Gorge 14.5 +1.4 21.7 20th 3.4 0.0 -1.8 18th 57.8 140.1 v low 41%
Lake St Clair National Park 13.7 +0.6 20.7 22nd 3.1 +0.2 -2.5 27th 73.2 130.1 low 56%
Liawenee 13.0 +0.8 20.0 20th 2.7 +1.0 -4.6 3rd 94.4 66.0 high 143%
West Coast (district 97)
Cape Sorell 17.8 +2.3 23.5 20th 11.8 +1.5 5.8 27th 47.2 107.6 v low 44%
Hartz Mountain (Keoghs Pimple) 12.0 +1.0 21.0 21st 5.8 +1.3 -0.2 27th 35.8 67.3 v low 53%
Low Rocky Point 17.0   24.3 20th 10.6   5.8 27th 62.8 107.0 low 59%
Mount Read 9.1 +0.2 16.5 19th 4.4 +1.0 -1.6 27th 190.0 276.0 low 69%
Scotts Peak Dam 16.6 +1.9 23.6 21st 7.8 +1.1 2.1 27th 80.6 123.2 low 65%
Strahan Aerodrome 18.3 +1.5 26.5 20th 9.2 +0.8 2.5 27th 92.8 114.0 average 81%
Warra 14.4 +0.9 21.0 20th 5.7 -0.1 -0.3 3rd 57.0 121.6 v low 47%
King Island (district 98)
King Island Airport 18.5 +0.7 25.5 7th 11.3 +0.8 5.9 27th 44.4 56.4 average 79%
Flinders Island (district 99)
Flinders Island Airport 19.6 +0.8 26.3 8th 9.7 -1.0 2.9 27th 66.4 58.1 average 114%
Hogan Island 18.7 +0.4 24.5 7th 13.1 0.0 8.4 27th 48.4 51.6 average 94%
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 9 am on Monday 1 May 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