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Tasmania in September 2025

Rainfall

  • Rainfall totals in September were above to very much above average across the west and south, below average for the east coast, and average for parts of the north-east.
  • Tasmania's area-averaged rainfall total in September was 179.7 mm, 33% above the 1961–1990 average.
  • September was the first month with widespread above average rainfall across western Tasmania since December 2024.
  • Some sites with less than 30 years of data had their highest total September rainfall on record, while other sites had their highest total September rainfall for at least 20 years.

Temperature

  • Mean maximum temperatures in September were average for most of Tasmania, and above average for the Bass Straight Islands and north-east.
  • Tasmania's area-averaged mean maximum temperature was 12.00 °C, 0.15 °C below the 1961–1990 average.
  • Mean minimum temperatures in September were above average across the north and east, very much above average for parts of the Bass Straight Islands, and average elsewhere.
  • Tasmania's area-averaged mean minimum temperature was 4.29 °C, 0.39 °C above the 1961–1990 average.
  • Tasmania had its lowest mean minimum temperature for September since 2022.
  • Tasmania's area-averaged mean temperature was 8.14 °C, 0.12 °C above the 1961–1990 average.
  • Cape Bruny (Cape Bruny) had its coolest September day (lowest daily maximum temperature) on record.
  • Grove (Research Station) had its coldest September night (lowest daily minimum temperature) on record.

Events

  • On 27 September, a deep low pressure system south of Tasmania directed several troughs and a cold front over Tasmania resulting in damaging winds, rain and snow across the state.
  • For more details, visit the September national climate summary.

Hobart (Ellerslie Road)

  • Total rainfall for Hobart (Ellerslie Road) was 54.2 mm, which is 102% of the long-term average of 53.0 mm.
  • The mean daily maximum temperature for Hobart (Ellerslie Road) was 15.8 °C, which is 0.6 °C above the long-term average of 15.2 °C.
  • The warmest day was 24.0 °C on the 15th, and the coolest day was on the 3rd when the temperature reached 10.7 °C.
  • The mean daily minimum temperature for Hobart (Ellerslie Road) was 6.9 °C, which is 0.4 °C above the long-term average of 6.5 °C.
  • The coldest morning was 1.0 °C on the 6th, and the warmest morning was on the 15th when the minimum temperature was 13.5 °C.

Extremes in September 2025
Hottest day 24.1 °C at Hobart Airport on the 15th
Warmest days on average 17.3 °C at Bicheno (Council Depot)
Coolest days on average 4.1 °C at kunanyi (Mount Wellington Pinnacle)
Coldest day -2.2 °C at kunanyi (Mount Wellington Pinnacle) on the 4th
Coldest night -6.3 °C at Butlers Gorge on the 6th
Coolest nights on average -1.7 °C at kunanyi (Mount Wellington Pinnacle)
Warmest nights on average 9.4 °C at Swan Island
Warmest night 14.6 °C at Flinders Island Airport on the 15th
Warmest on average overall 12.8 °C at Bicheno (Council Depot)
Coolest on average overall 1.1 °C at kunanyi (Mount Wellington Pinnacle)
Wettest overall 582.9 mm at Lake Margaret Dam
Wettest day 62.0 mm at Jackeys Marsh on the 8th
Strongest wind gust 148.0 km/h at Maatsuyker Island Lighthouse on the 16th

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 total rainfall
New record
(mm)
Old
record
Years of
record
Average for
September
Ouse Fire Station 139.8 135.8 in 2003 27 64.8
Hartz Mountain (Keoghs Pimple) 190.8 186.4 in 2024 26 101.5
Derwent Bridge 301.4 299.8 in 2024 25 152.3
Warra 398.8 387.0 in 2024 20 203.0



Highest September total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
September
Lake Margaret Power Station 512.6 692.2 in 1980 296.7
Yolla (Sea View) 218.8 240.8 in 1996 143.2
Maatsuyker Island Lighthouse 135.2 152.0 in 1998 107.8
Wayatinah (Saltas) 311.8 346.2 in 2003 164.0
Mount Dromedary 143.6 196.4 in 2003 91.9
Luncheon Hill (Forestry) 251.8 260.4 in 2003 166.4
Loongana (Serendipity) 259.0 285.8 in 2003 179.5

note: there may be gaps in the historical record at some sites, so it is possible more recent higher values have gone unreported




Record lowest September daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Cape Bruny (Cape Bruny) 8.1 on the 4th 8.4 on 05 Sep 2017 29 14.5



Record lowest September temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Grove (Research Station) -3.3 on the 6th -3.2 on 04 Sep 2008 22 4.3




Summary statistics for September 2025
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
September
2025
Diff
from
average
Highest for
September
2025
Mean for
September
2025
Diff
from
average
Lowest for
September
2025
Total for
September
2025
Average
for
September
Rank of
September
2025
Fraction of
September
average
Northern (district 91)
Cressy (Brumbys Creek) 14.5 19.1 15th 4.5 -2.4 2nd 72.8
Devonport Airport 14.8 +0.4 19.3 23rd 6.8 +0.6 1.5 10th 84.4 72.4 average 117%
Kennaook/Cape Grim 13.2 -0.1 16.8 15th 8.5 -0.2 3.7 6th 127.8 78.0 high 164%
Launceston (Ti Tree Bend) 15.7 -0.1 19.2 15th 5.7 +0.4 -0.4 5th 72.4 63.5 average 114%
Launceston Airport 14.8 -0.4 18.8 15th 4.4 +0.3 -0.5 5th 63.8 52.8 average 121%
Low Head 14.3 +0.2 18.2 15th 8.6 +0.1 4.2 10th 58.4 57.3 average 102%
Luncheon Hill (Forestry) 12.6 +0.1 17.4 14th 5.4 -0.1 1.9 5th 251.8 163.4 high 154%
Marrawah 14.1 +0.4 18.7 15th 7.6 +0.1 3.8 6th 163.0 103.7 high 157%
Scottsdale (West Minstone Road) 13.9 -0.4 18.3 15th 5.2 +0.4 -2.2 5th 92.6 93.4 average 99%
Sheffield School Farm 12.9 -0.4 17.8 15th 4.8 +0.1 -0.3 29th 136.2 112.1 average 122%
Smithton Aerodrome 14.4 -0.5 17.4 15th 7.0 +0.8 -0.3 6th 153.6 97.2 high 158%
Wynyard Airport 15.0 +0.4 18.4 15th 5.8 +0.8 -0.2 29th 130.2 94.3 high 138%
East Coast (district 92)
Bicheno (Council Depot) 17.3 +1.1 23.0 15th 8.3 +0.8 3.0 6th 16.1 44.7 low 36%
Fingal (Fleming St) 14.9 21.3 15th 3.9 -3.6 2nd 22.0
Friendly Beaches 17.1 +0.2 23.6 15th 7.4 -0.1 3.3 6th 18.6 44.7 low 42%
larapuna (Eddystone Point) 16.0 +1.1 20.2 15th 8.0 +0.1 3.1 5th 50.2 62.8 average 80%
Maria Island (Point Lesueur) 15.1 0.0 19.0 23rd 8.3 -0.1 4.5 5th 14.4 43.5 low 33%
St Helens Aerodrome 16.3 +0.2 20.8 15th 7.1 +0.4 1.0 5th 18.8 53.1 low 35%
Swan Island 14.6 -0.1 18.1 15th 9.4 +0.2 5.9 10th 61.4 49.9 average 123%
Swansea (Francis Street) 16.9 +0.4 22.8 15th 6.7 +0.7 0.0 6th 13.6 41.6 low 33%
Midlands (district 93)
Ross (The Boulevards) 14.2 -0.4 18.6 15th 2.9 -0.6 -3.3 2nd 43.4 50.3 average 86%
Southeast (district 94)
Campania (Kincora) 15.9 -0.4 23.4 15th 5.4 0.0 -2.8 6th 39.8 44.1 average 90%
Cape Bruny (Cape Bruny) 14.0 -0.5 22.4 15th 6.8 -0.7 2.3 6th 87.6 70.2 average 125%
Dennes Point 15.0 0.0 21.7 15th 7.2 -0.3 2.3 6th 30.8 39.0 average 79%
Dover 14.4 -0.4 22.2 15th 4.9 -0.1 -1.0 6th 117.8 83.5 high 141%
Dunalley (Stroud Point) 15.5 -0.1 20.8 15th 7.4 -0.5 2.0 6th 22.0 41.3 low 53%
Grove (Research Station) 14.7 -0.7 22.7 15th 4.3 0.0 -3.3 6th 125.8 76.5 high 164%
Hobart (Ellerslie Road) 15.8 +0.6 24.0 15th 6.9 +0.4 1.0 6th 54.2 53.0 average 102%
Hobart Airport 16.2 24.1 15th 6.3 0.8 6th 25.4
kunanyi (Mount Wellington Pinnacle) 4.1 -0.7 12.1 15th -1.7 -0.6 -5.1 5th 34.2 70.9 low 48%
Maatsuyker Island Lighthouse 11.7 -0.5 19.2 15th 6.7 -0.2 3.4 5th 135.2 107.6 high 126%
Tasman Island 12.4 -0.3 17.8 15th 6.6 -0.4 1.9 5th 72.0 71.7 average 100%
Tunnack Fire Station 12.3 -0.3 19.6 15th 3.2 0.0 -3.4 6th 36.0 56.7 average 64%
Derwent Valley (district 95)
Bushy Park (Bushy Park Estates) 15.3 -0.3 23.9 15th 4.8 +0.8 -2.7 6th 103.0 53.3 high 193%
Ouse Fire Station 14.9 -0.8 23.7 15th 4.5 +0.6 -4.0 6th 139.8 64.8 highest 216%
Central Plateau (district 96)
Butlers Gorge 9.1 -1.1 18.0 15th 1.6 +0.5 -6.3 6th 305.6 170.7 high 179%
Liawenee 7.6 -1.5 15.5 15th -0.2 +0.2 -5.7 29th 138.0 103.9 high 133%
West Coast (Mountain Region) (district 97)
Cape Sorell 13.9 +0.6 17.6 15th 8.3 +0.3 3.9 6th 130.8 117.9 average 111%
Hartz Mountain (Keoghs Pimple) 6.6 -2.0 15.6 15th 1.0 -0.9 -2.6 5th 190.8 101.5 highest 188%
Low Rocky Point 13.2 -0.7 20.4 15th 7.5 -0.3 2.9 6th 160.6 127.3 high 126%
Mount Read 4.5 -1.1 11.8 15th -0.2 -0.6 -3.4 5th 543.6 370.7 high 147%
Scotts Peak Dam 10.9 -1.5 19.9 15th 3.6 -0.8 -0.3 29th 235.0 208.8 average 112%
Strahan Aerodrome 14.1 -0.3 20.5 15th 7.2 +0.8 0.5 6th 195.8 147.1 high 133%
Warra 10.4 -1.1 19.2 15th 3.0 -0.6 -1.8 29th 398.8 203.0 highest 196%
King Island (district 98)
King Island Airport 15.2 +0.5 21.0 15th 9.0 +0.6 3.6 29th 104.0 84.6 high 123%
Flinders Island (district 99)
Flinders Island Airport 15.7 +0.5 22.5 15th 8.8 +1.1 0.8 6th 58.2 61.5 average 95%
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 on Wednesday 1 October 2025. 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, excluding the current year. The length of record can vary widely from site to site. Averages are not shown for sites with fewer 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.

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

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