Tasmania in September 2023

Rainfall

  • Rainfall was very much below average for September across the north-east and along the north coast (in the driest 10% of September records). Rainfall was below average along the west coast, but was close to average for the western interior and across the south.
  • The rainfall total for Tasmania as a whole was 35% below the September average (based on 1961-1990) and the lowest since 2015.
  • The wettest day was the 20th when Warra recorded 66.0 mm when a rainband from the south-west slowly crossed the state.
  • Bronte Heights had its highest September daily rainfall on record.
  • Light snowfalls were recorded across elevated regions of southern Tasmania on the 1st, and central and southern Tasmania on the 11th.

Temperature

Hobart (Ellerslie Road)

  • Total rainfall for Hobart (Ellerslie Road) was 38.4 mm, which is 73% of the long-term average of 52.8 mm.
  • The mean daily maximum temperature for Hobart (Ellerslie Road) was 17.5 °C, which is 2.3 °C above the long-term average of 15.2 °C.
  • The warmest day was 24.1 °C on the 30th, and the coolest day was on the 21st when the temperature reached 11.9 °C.
  • The mean daily minimum temperature for Hobart (Ellerslie Road) was 7.4 °C, which is 0.9 °C above the long-term average of 6.5 °C.
  • The coldest morning was 1.8 °C on the 22nd, and the warmest morning was on the 29th when the minimum temperature was 12.3 °C.

Extremes in September 2023
Hottest day 27.3 °C at Swansea (Francis Street) on the 30th
Warmest days on average 18.5 °C at Campania (Kincora)
18.5 °C at Friendly Beaches
Coolest days on average 7.2 °C at Mount Read
Coldest day 0.3 °C at kunanyi (Mount Wellington Pinnacle) on the 20th
Coldest night -6.8 °C at Liawenee on the 26th
Coolest nights on average 0.0 °C at kunanyi (Mount Wellington Pinnacle)
Warmest nights on average 10.2 °C at Hogan Island
10.2 °C at Swan Island
Warmest night 13.4 °C at Friendly Beaches on the 16th
Warmest on average overall 13.2 °C at Bicheno (Council Depot)
13.2 °C at Friendly Beaches
Coolest on average overall 3.7 °C at kunanyi (Mount Wellington Pinnacle)
Wettest overall 320.8 mm at Mount Read
Wettest day 66.0 mm at Warra on the 20th
Strongest wind gust 144 km/h at Maatsuyker Island Lighthouse on the 17th

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 September daily rainfall
New record
(mm)
Old
record
Years of
record
Bronte Heights 40.0 on the 20th 39.1 on the 12th in 1920 97



Record highest September temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Wynyard Airport 21.4 on the 29th 20.6 on the 15th in 2002 36 14.5
Ross (The Boulevards) 23.2 on the 30th 22.6 on the 20th in 2019 30 14.6
King Island Airport 24.4 on the 14th 23.8 on the 28th in 2014 29 14.7
Luncheon Hill (Forestry) 22.9 on the 14th 21.8 on the 30th in 2001 28 12.5
Cape Sorell 21.2 on the 14th 21.0 on the 16th in 2022 27 13.3
Mount Read 16.3 on the 14th 16.2 on the 15th in 2002 27 5.6
Tunnack Fire Station 22.6 on the 14th 21.0 on the 29th in 2001 27 12.5
Low Head 20.6 on the 30th 19.2 on the 2nd in 2021 26 14.0
Liawenee 20.5 on the 14th 18.5 on the 23rd in 2014 23 9.0



Record highest September mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
September
larapuna (Eddystone Point) 17.1 16.8 in 2014 112 14.8
Butlers Gorge 12.5 12.3 in 1954 62 10.2
kunanyi (Mount Wellington Pinnacle) 7.7 7.4 in 2014 42 4.7
Launceston (Ti Tree Bend) 17.3 = 17.3 in 2014 40 15.7
Wynyard Airport 16.1 15.7 in 2014 35 14.5
Devonport Airport 15.7 15.5 in 2011 31 14.4
Ross (The Boulevards) 16.5 16.0 in 2014 29 14.6
King Island Airport 16.3 16.0 in 2013 28 14.7
Friendly Beaches 18.5 18.4 in 2014 26 16.8
Sheffield School Farm 14.7 14.3 in 2014 26 13.2
Smithton Aerodrome 16.1 15.9 in 2014 26 14.8
Tunnack Fire Station 14.9 14.0 in 2014 26 12.5
Low Head 15.2 14.8 in 2022 25 14.0
Ouse Fire Station 17.5 17.3 in 2014 25 15.7
Campania (Kincora) 18.5 17.8 in 2014 23 16.2
Liawenee 11.4 11.2 in 2001 22 9.0
St Helens Aerodrome 17.7 17.4 in 2014 22 16.1
Swan Island 15.8 15.7 in 2014 21 14.7
Tasman Island 14.2 14.1 in 2014 21 12.6

Highest September mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
September
Bushy Park (Bushy Park Estates) 18.0 18.4 in 1950* 15.5
Bicheno (Council Depot) 17.7 19.2 in 1987* 16.2
Flinders Island Airport 16.9 17.1 in 2001 15.2
Scottsdale (West Minstone Road) 15.7 =15.7 in 2001 14.3
Luncheon Hill (Forestry) 14.1 14.8 in 2001* 12.5
Strahan Aerodrome 15.8 16.3 in 2001* 14.4

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




Record highest September mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Cape Sorell 9.4 = 9.4 in 1937 83 7.9



Record highest September mean temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Cape Sorell 12.5 12.2 in 2014 82 10.6
Friendly Beaches 13.2 = 13.2 in 1998 26 12.1
Low Head 12.2 12.1 in 2013 25 11.3
St Helens Aerodrome 12.6 12.4 in 2013 22 11.3
Swan Island 13.0 12.7 in 2014 21 11.9

Highest September mean temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
September
Bicheno (Council Depot) 13.2 13.4 in 1987* 11.8
larapuna (Eddystone Point) 13.1 13.2 in 2001 11.4
Liawenee 5.8 6.1 in 2001 4.3
Scottsdale (West Minstone Road) 10.8 11.4 in 2001 9.5
Tunnack Fire Station 9.0 9.3 in 2001 7.9
Luncheon Hill (Forestry) 10.1 10.8 in 2001* 9.0

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




Summary statistics for September 2023
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
September
2023
Diff
from
average
Highest for
September
2023
Mean for
September
2023
Diff
from
average
Lowest for
September
2023
Total for
September
2023
Average
for
September
Rank of
September
2023
Fraction of
September
average
Northern (district 91)
Cape Grim 14.2 +1.0 19.7 30th 9.4 +0.8 5.4 26th 37.4 76.0 v low 49%
Cressy (Brumbys Creek) 16.5   20.8 29th 4.5   -1.8 22nd 18.8
Devonport Airport 15.7 +1.3 19.9 25th 6.8 +0.7 1.8 22nd 23.8 72.2 v low 33%
Launceston (Ti Tree Bend) 17.3 +1.6 22.9 25th 6.2 +1.0 1.3 10th 29.6 63.0 low 47%
Launceston Airport 16.5 +1.4 21.4 29th 4.7 +0.7 0.3 1st 26.4 52.3 v low 50%
Low Head 15.2 +1.2 20.6 30th 9.2 +0.7 4.7 2nd 20.0 55.6 lowest 36%
Luncheon Hill (Forestry) 14.1 +1.6 22.9 14th 6.1 +0.7 2.6 22nd 108.6 163.4 low 66%
Marrawah 15.0 +1.3 20.8 30th 8.3 +0.8 4.2 2nd 52.6 102.6 v low 51%
Scottsdale (West Minstone Road) 15.7 +1.4 20.6 30th 5.9 +1.1 0.8 1st 34.8 92.2 v low 38%
Sheffield School Farm 14.7 +1.5 20.6 14th 4.7 0.0 0.7 22nd 35.2 112.2 lowest 31%
Smithton Aerodrome 16.1 +1.3 19.9 14th 6.5 +0.3 0.7 5th 51.0 94.8 v low 54%
Wynyard Airport 16.1 +1.6 21.4 29th 5.5 +0.5 0.6 22nd 44.2 93.5 low 47%
East Coast (district 92)
Bicheno (Council Depot) 17.7 +1.5 27.0 30th 8.7 +1.2 3.4 11th 12.1 44.7 low 27%
Fingal (Fleming St) 17.2   24.3 30th 2.9   -2.7 10th 9.6
Friendly Beaches 18.5 +1.7 27.2 30th 7.9 +0.5 2.1 2nd 11.6 45.5 v low 25%
larapuna (Eddystone Point) 17.1 +2.3 22.5 30th 9.0 +1.1 4.8 10th 16.2 62.8 v low 26%
Maria Island (Point Lesueur) 16.1 +1.0 23.2 30th 9.0 +0.6 5.1 11th 16.6 44.5 low 37%
St Helens Aerodrome 17.7 +1.6 24.6 30th 7.6 +1.0 2.0 10th 5.2 53.0 lowest 10%
Swan Island 15.8 +1.1 19.6 30th 10.2 +1.0 6.4 1st 15.2 47.9 v low 32%
Swansea (Francis Street) 17.8 +1.4 27.3 30th 5.8 -0.2 -0.7 11th 13.2 41.8 low 32%
Midlands (district 93)
Ross (The Boulevards) 16.5 +1.9 23.2 30th 2.5 -1.0 -4.4 22nd 13.4 49.4 lowest 27%
Southeast (district 94)
Campania (Kincora) 18.5 +2.3 25.2 13th 4.8 -0.5 -1.2 22nd 37.4 43.9 average 85%
Cape Bruny (Cape Bruny) 15.4 +0.9 21.7 13th 7.9 +0.4 4.9 21st 63.4 68.6 average 92%
Dennes Point 16.5 +1.6 24.0 13th 7.3 -0.2 3.0 22nd 29.8 37.7 low 79%
Dover 16.0 +1.2 23.3 13th 5.1 +0.1 1.0 22nd 80.8 82.8 average 98%
Dunalley (Stroud Point) 16.8 +1.4 23.7 19th 8.0 +0.1 4.5 2nd 24.6 41.4 low 59%
Grove (Research Station) 16.9 +1.5 24.3 14th 3.5 -0.8 -2.2 11th 67.0 73.9 average 91%
Hobart (Ellerslie Road) 17.5 +2.3 24.1 30th 7.4 +0.9 1.8 22nd 38.4 52.8 average 73%
Hobart Airport 17.9   26.0 30th 5.7   -1.8 11th 17.0
kunanyi (Mount Wellington Pinnacle) 7.7 +3.0 15.6 13th 0.0 +1.1 -5.0 11th 44.0 71.5 low 62%
Maatsuyker Island Lighthouse 13.1 +0.9 20.3 4th 7.9 +1.0 5.0 9th 101.6 107.6 average 94%
Tasman Island 14.2 +1.6 21.3 19th 7.7 +0.7 3.6 22nd 51.0 71.4 average 71%
Tunnack Fire Station 14.9 +2.4 22.6 14th 3.2 0.0 -5.0 22nd 18.8 56.8 v low 33%
Derwent Valley (district 95)
Bushy Park (Bushy Park Estates) 18.0 +2.5 24.0 14th 3.5 -0.4 -2.4 4th 49.2 53.4 average 92%
Ouse Fire Station 17.5 +1.8 24.7 14th 3.3 -0.6 -3.2 4th 52.8 63.4 average 83%
Central Plateau (district 96)
Butlers Gorge 12.5 +2.3 21.2 14th 1.5 +0.4 -6.0 26th 186.2 168.5 average 111%
Liawenee 11.4 +2.4 20.5 14th 0.1 +0.5 -6.8 26th 27.8 101.4 lowest 27%
West Coast (district 97)
Cape Sorell 15.5 +2.2 21.2 14th 9.4 +1.5 4.5 26th 66.4 117.9 v low 56%
Hartz Mountain (Keoghs Pimple) 9.9 +1.3 19.0 14th 2.4 +0.5 -1.0 11th 107.4 98.1 average 109%
Low Rocky Point 14.4 +0.4 22.4 4th 8.2 +0.5 4.3 26th 76.2 125.5 v low 61%
Mount Read 7.2 +1.6 16.3 14th 1.1 +0.7 -2.4 9th 320.8 357.0 average 90%
Scotts Peak Dam 14.0 +1.5 20.2 24th 5.1 +0.8 1.8 26th 189.4 205.6 average 92%
Strahan Aerodrome 15.8 +1.4 24.5 14th 7.2 +0.9 0.6 26th 105.2 146.5 low 72%
Warra 12.6 +1.1 20.5 14th 4.1 +0.6 0.3 3rd 260.4 193.3 high 135%
King Island (district 98)
King Island Airport 16.3 +1.6 24.4 14th 8.8 +0.4 3.7 3rd 29.4 83.8 v low 35%
Flinders Island (district 99)
Flinders Island Airport 16.9 +1.7 24.9 30th 7.8 +0.2 0.8 2nd 23.0 61.4 v low 37%
Hogan Island     24.7 30th 10.2 +1.0 6.8 9th 21.4 51.7 v low 41%
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, usually published in the first week of the following 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.

This statement has been prepared based on information available at 3 pm on Sunday 1 October 2023. 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.

Information about Australian Indigenous seasonal calendars is available at the Indigenous Weather Knowledge website.


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