Monday, 2 October 2023 - Monthly Climate Summary for Western Australia - Product code IDCKGC11R0

Western Australia in September 2023

Rainfall

• September rainfall was below average to near average in the southern half of Western Australia. Monthly totals ranged from 10 mm in the north and east of the South West Land Division, up to 100 mm in the state's far southwest. Monthly totals in excess of 100–150 mm were reported in areas from Busselton to Walpole, and along the Perth Hills.
• Most of northern WA recorded no rainfall, with isolated light rainfall of less than 10 mm recorded in the Kimberley.
• September rainfall was 5.1 mm, which was 50% below the 1961–1990 average, and the driest September since 2019 for Western Australia as a whole.
• A cold front brought widespread moderate daily rainfall in the southwest WA on the 13th and 14th, with heavier falls of 50–90 mm in and around Busselton. Multiple sites had their highest September daily rainfall on record.

Temperature

• Mean maximum temperatures were very much above average (highest 20% of all observations) for most of Western Australia,and highest on record (since 1910) in a broad area from the inland north through central and south coast of the state.
• For WA as a whole, the mean maximum temperature was 3.54 °C above the 1961–1990 average, the highest on record (since 1910), and 0.7 °C higher than the previous record(2.79 °C anomaly in 2019).
• Mean minimum temperatures were very much above average (highest 20% of all observations) for most of Western Australia,and highest on record (since 1910) in a broad area from the inland north to central and south coast of the state. Most of the Kimberley recorded close to average mean minimum temperatures.
• For WA as a whole, the mean minimum temperature was 2.33 °C above the 1961–1990 average, the highest on record (since 1910), and 0.4 °C higher than the previous record(1.97 °C anomaly in 2020).
• For WA as a whole, the mean temperature was 2.94 °C above the 1961–1990 average
• It was the warmest September on record (since 1910) for WA as a whole, with the mean temperature being 2.94 °C above the 1961–1990, more than half a degree higher than the previous record (2.37 °C anomaly in 2020).
• Towards the end of September, daily maximum temperatures reached the mid to high 30s in central and southern WA, and persisted in the low 40s in the Pilbara, as a deep trough moved inland from the west coast. Dozens of September temperature records were broken between the 27th and 29th.
• Port Hedland in the Pilbara, not only set the highest September temperature record on the 26th, but also set a new September record for the longest run of consecutive days (5) with maximum temperatures above 40 °C ending on the 28th. The previous record was 3 consecutive days between 28 and 30 September 2006.
• Geraldton Airport recorded a maximum temperature of 39.0 °C on the 27th, which was the highest September temperature in 83 years of records. The previous record was 36.1 °C on 29 September 2010.
• Mardie in the Pilbara coast, had its previous September temperature record (41.0 °C on 27 September 1980) broken three times on the 27th (41.7 °C), 28th(41.1 °C) and 30th(41.4 °C) .
• Dozens of sites in the southern WA, as well as in the Gascoyne and Pilbara, including sites with over 50 years of observations had their highest September mean maximum temperature on record.
• Dozens of sites in the southern WA, including sites with over 50 years of observations had their highest September mean maximum temperature on record.
• In the second half of September, dozens of sites in the southern WA had their warmest September night on record.

Wind

• Widespread damaging wind gusts (above 90 km/h) were recorded in the Central West and Lower West, exteding inland to southern Goldfields on the 13th.

Extremes Maps Records Summaries Important notes the top

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Extremes in September 2023
Hottest day	42.8 °C at Mandora on the 28th
Warmest days on average	38.2 °C at Fitzroy Crossing Aero
Coolest days on average	18.0 °C at Shannon
Coldest day	12.0 °C at Manjimup on the 3rd
Coldest night	-5.2 °C at Eyre on the 8th
Coolest nights on average	6.5 °C at Wandering
Warmest nights on average	24.8 °C at Troughton Island
Warmest night	28.5 °C at Bidyadanga on the 28th
Warmest on average overall	29.0 °C at Argyle Aerodrome 29.0 °C at Wyndham Aero
Coolest on average overall	13.2 °C at Bridgetown
Wettest overall	165.1 mm at Pemberton
Wettest day	91.4 mm at Busselton Aero on the 13th
Strongest wind gust	128 km/h at Rottnest Island on the 13th

Extremes Maps Records Summaries Important notes the top

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Maps
	Observed	Anomaly	Decile rank
Total rainfall
Mean daily maximum temperatures
Mean daily minimum temperatures

Click on a map to show it full size in a pop-up window

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Record highest September daily rainfall
	New record (mm)		Old record		Years of record
Busselton Shire	73.0	on the 13th	64.0	on the 21st in 1979	114
Pemberton	50.0	on the 13th	48.4	on the 15th in 2002	83
Wokalup	55.0	on the 13th	49.8	on the 10th in 1996	72
Jarrahwood	56.4	on the 13th	47.2	on the 23rd in 2013	49
Shannon	38.4	on the 13th	38.0	on the 8th in 2007	27
Busselton Aero	91.4	on the 13th	50.2	on the 13th in 2022	26
Waeel	25.6	on the 14th	19.6	on the 7th in 2013	25
Acton Park	68.0	on the 13th	55.2	on the 13th in 2022	23
Quadney	31.8	on the 14th	25.2	on the 29th in 2001	23
Jindong	36.0	on the 13th	35.0	on the 4th in 2012	22
Werribee	38.8	on the 14th	33.0	on the 29th in 2001	22
Happy Valley	34.0	on the 13th	30.6	on the 14th in 2013	21
Yealering East	17.8	on the 14th	16.8	on the 22nd in 2014	21
Aston Downs Alert	56.6	on the 13th	35.0	on the 13th in 2022	20




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Record highest September temperature
	New record (°C)		Old record		Years of record	Average for September
Northam	34.7	on the 28th	34.6	on the 30th in 1918	114	20.5
Salmon Gums Res.Stn.	37.5	on the 29th	35.6	on the 27th in 1961	85	20.5
Kalgoorlie-Boulder Airport	37.9	on the 29th	36.8	on the 28th in 1980	83	22.4
Mullewa	38.5	on the 27th	37.6	on the 30th in 1967	80	23.5
Perth Airport	34.9	on the 27th	34.5	on the 20th in 2014	80	20.3
Corrigin	34.0	on the 28th	33.1	on the 29th in 2006	76	19.3
Port Hedland Airport	42.3	on the 26th	42.2	on the 30th in 2006	76	32.5
Meekatharra Airport	38.5	on the 29th	37.7	on the 28th in 1980	74	25.8
Cape Naturaliste	27.5	on the 27th	27.3	on the 30th in 2010	67	17.4
Mardie	41.7	on the 27th	41.0	on the 27th in 1980	67	32.3
Pearce RAAF	34.1	on the 27th	33.0	on the 20th in 2014	66	20.2
Bencubbin	36.0	on the 28th	34.8	on the 30th in 1967	65	21.0
Manjimup	28.8	on the 27th	28.6	on the 9th in 2019	64	16.6
Mandora	42.8	on the 28th	= 42.8	on the 29th in 1998	62	33.9
Onslow Airport	41.7	on the 28th	40.7	on the 17th in 2017	58	30.2
Badgingarra Research Stn	35.2	on the 27th	34.6	on the 30th in 1967	57	20.6
Karnet	31.4	on the 27th	30.6	on the 20th in 2014	57	17.7
Ongerup	32.7	on the 22nd	31.6	on the 30th in 2019	57	18.1
Wongan Hills	35.4	on the 28th	35.2	on the 30th in 1967	57	20.8
Brookton	33.4	on the 22nd	33.1	on the 29th in 2006	56	19.3
Beverley	34.8	on the 28th	33.8	on the 29th in 2006	54	20.5
Jurien Bay	35.2	on the 27th	34.4	on the 28th in 2020	54	21.4
Pingelly	32.9	on the 28th	32.6	on the 29th in 2006	52	18.5
Hyden	34.5	on the 27th	= 34.5	on the 29th in 2006	51	20.6
Kalbarri	38.5	on the 27th	37.0	on the 28th in 1990	50	24.1
Emu Creek Station	41.4	on the 28th	40.4	on the 27th in 2010	48	30.7
Goomalling	35.4	on the 27th	34.3	on the 20th in 2014	48	20.9
Paynes Find	38.2	on the 28th	37.2	on the 15th in 2020	45	23.9
Jarrahwood	30.5	on the 27th	30.0	on the 20th in 2014	42	18.3
Murchison	39.5	on the 28th	38.0	on the 15th in 2020	34	26.4
Rottnest Island	32.8	on the 27th	30.8	on the 20th in 2014	34	18.9
Laverton Aero	37.6	on the 29th	36.7	on the 26th in 1999	32	24.7
Swanbourne	34.7	on the 27th	34.2	on the 20th in 2014	31	19.9
Bickley	31.3	on the 27th	30.5	on the 20th in 2014	30	17.7
Leinster Aero	37.9	on the 29th	36.3	on the 17th in 1994	30	25.6
Perth Metro	34.3	on the 27th	34.2	on the 20th in 2014	30	20.5
Mount Magnet Aero	38.3	on the 28th	37.3	on the 15th in 2020	29	24.8
Gingin Aero	35.2	on the 27th	34.8	on the 20th in 2014	28	20.9
Newdegate Research Station	34.1	on the 28th	32.5	on the 30th in 2019	28	19.0
Paraburdoo Aero	40.2	on the 29th	= 40.2	on the 28th in 2010	28	31.4
York	35.0	on the 28th	33.7	on the 29th in 2006	28	20.4
Cunderdin Airfield	35.9	on the 22nd	35.0	on the 29th in 2006	27	21.1
Dalwallinu	36.7	on the 28th	35.0	on the 29th in 2006	27	21.3
Lake Grace	33.5	on the 28th	32.3	on the 10th in 2019	27	19.4
Morawa Airport	38.2	on the 27th	36.2	on the 29th in 2006	27	23.3
Newman Aero	38.1	on the 29th	38.0	on the 27th in 2000	27	30.5
Southern Cross Airfield	36.8	on the 29th	34.7	on the 13th in 2019	27	21.9
Busselton Aero	28.8	on the 27th	28.1	on the 20th in 2014	26	18.4
Thevenard Island	39.1	on the 28th	37.0	on the 17th in 2000	26	27.8
Wandering	31.6	on the 22nd	30.6	on the 29th in 2006	25	18.5
Marble Bar	41.9	on the 30th	41.7	on the 28th in 2003	24	34.7
Norseman Aero	38.7	on the 29th	36.0	on the 10th in 2019	24	22.4
Garden Island HSF	33.2	on the 27th	32.9	on the 20th in 2014	22	19.0
Mandurah	30.8	on the 27th	28.9	on the 29th in 2022	22	19.2
Bulga Downs	38.6	on the 29th	37.5	on the 26th in 2010	21	25.5
Collie East	30.6	on the 28th	30.2	on the 20th in 2014	21	18.5




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Record highest September mean daily maximum temperature
	New record (°C)	Old record		Years of record	Average for September
Cape Naturaliste	19.6	19.4	in 2019	119	17.4
Albany	19.6	19.4	in 2014	106	17.3
Narrogin	21.4	21.1	in 2019	105	17.8
Eucla	25.8	24.8	in 2013	102	21.4
Salmon Gums Res.Stn.	25.9	23.6	in 2019	84	20.5
Manjimup	19.2	= 19.2	in 2019	83	16.6
Kalgoorlie-Boulder Airport	27.2	26.1	in 2019	82	22.4
Meekatharra Airport	30.8	29.6	in 2019	73	25.8
Bencubbin	25.8	24.7	in 2019	72	21.0
Eyre	25.8	24.3	in 2014	63	21.4
Ravensthorpe	23.1	22.8	in 2019	61	19.6
Onslow Airport	33.5	32.8	in 2020	57	30.2
Brookton	22.1	22.0	in 1987	55	19.3
Esperance	22.5	22.0	in 2019	54	19.5
Hyden	24.9	24.7	in 2019	50	20.6
Telfer Aero	35.9	= 35.9	in 2020	49	32.9
Warburton Airfield	32.2	31.9	in 2013	49	28.1
Learmonth Airport	32.8	32.0	in 2020	48	29.5
Wagin	21.2	21.1	in 2019	48	18.3
Emu Creek Station	33.9	33.3	in 2015	47	30.7
Paynes Find	28.1	27.6	in 2019	44	23.9
Jarrahwood	20.7	20.4	in 2019	41	18.3
Carnegie	32.5	31.9	in 2020	33	28.8
Murchison	31.1	29.8	in 2019	33	26.4
Rottnest Island	20.3	20.2	in 1990	33	18.9
Esperance Aero	22.2	21.7	in 2019	31	19.1
Laverton Aero	29.2	28.5	in 2019	31	24.7
Forrest	28.0	27.6	in 2019	30	24.6
Jacup	22.3	22.1	in 2019	30	19.0
Leinster Aero	30.0	28.9	in 2019	29	25.6
Mount Magnet Aero	29.2	28.6	in 2019	28	24.8
Newdegate Research Station	22.9	22.4	in 2019	27	19.0
Paraburdoo Aero	34.9	33.6	in 2020	27	31.4
Rocky Gully	19.1	18.8	in 2019	27	16.7
York	23.7	23.2	in 2019	27	20.4
Cunderdin Airfield	24.7	24.5	in 2019	26	21.1
Lake Grace	22.9	22.7	in 2019	26	19.4
Newman Aero	33.7	33.3	in 2020	26	30.5
Southern Cross Airfield	25.8	25.7	in 2019	26	21.9
Wandering	21.0	20.8	in 2019	24	18.5
Norseman Aero	26.7	25.3	in 2019	23	22.4
Garden Island HSF	20.2	= 20.2	in 2014	21	19.0
Munglinup West	23.8	22.8	in 2019	21	20.2
Bulga Downs	29.7	28.7	in 2019	20	25.5




Highest September mean daily maximum temperature for at least 20 years
	Observed (°C)	Most recent higher		Average for September
Northam	23.8	24.7	in 1914*	20.5
Mardie	35.1	35.9	in 1981	32.3

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




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Record highest September daily minimum temperature
	New record (°C)		Old record		Years of record	Average for September
Kalgoorlie-Boulder Airport	22.8	on the 12th	22.0	on the 28th in 1944	83	8.1
Meekatharra Airport	24.0	on the 29th	21.5	on the 14th in 1981	74	11.6
Bencubbin	20.7	on the 28th	17.5	on the 30th in 2010	65	7.3
Bidyadanga	28.5	on the 28th	26.5	on the 21st in 2021	63	17.7
Ravensthorpe	20.5	on the 28th	17.7	on the 22nd in 1987	62	7.5
Merredin	19.0	on the 22nd	17.9	on the 30th in 2019	58	6.8
Ongerup	19.1	on the 27th	14.9	on the 11th in 2006	57	6.4
Wongan Hills	20.1	on the 28th	16.5	on the 30th in 2010	57	7.6
Esperance	20.1	on the 23rd	17.6	on the 10th in 1994	55	9.6
Pingelly	15.5	on the 28th	14.3	on the 21st in 1977	52	6.5
Hyden	17.0	on the 28th	14.6	on the 11th in 2006	51	5.9
Goomalling	19.0	on the 28th	16.0	on the 30th in 2010	48	6.9
Paynes Find	20.5	on the 28th	20.3	on the 13th in 1981	45	8.1
Cygnet Bay	25.0	on the 30th	= 25.0	on the 26th in 2022	37	17.9
Carnegie	23.0	on the 23rd	21.8	on the 21st in 2001	34	11.5
Windy Harbour	16.0	on the 23rd	= 16.0	on the 20th in 1985	34	9.4
Esperance Aero	19.6	on the 23rd	16.2	on the 10th in 2020	32	8.4
Jacup	15.7	on the 28th	15.1	on the 11th in 2006	31	6.3
Bickley	18.8	on the 28th	16.1	on the 10th in 2015	30	8.3
Leinster Aero	22.0	on the 12th	20.9	on the 10th in 2019	30	10.7
Mount Magnet Aero	22.0	on the 28th	21.2	on the 15th in 2020	29	10.5
Dalwallinu	18.8	on the 28th	15.6	on the 30th in 2010	27	6.9
Lake Grace	15.2	on the 28th	14.7	on the 21st in 2017	27	6.5
Morawa Airport	22.1	on the 28th	17.3	on the 29th in 2018	27	7.8
Newman Aero	23.3	on the 25th	21.9	on the 30th in 2008	27	12.3
Southern Cross Airfield	18.5	on the 28th	16.6	on the 30th in 2010	27	5.5
Barrow Island Airport	24.9	on the 30th	24.0	on the 17th in 2020	25	19.6
Varanus Island	25.3	on the 30th	24.5	on the 16th in 2020	25	21.0
Marble Bar	28.1	on the 24th	24.8	on the 25th in 2022	24	16.8
Norseman Aero	19.6	on the 29th	17.8	on the 10th in 2020	24	6.4
Mandurah	18.2	on the 28th	18.1	on the 24th in 2015	22	11.8
Munglinup West	18.3	on the 23rd	15.9	on the 24th in 2013	22	7.4
Bulga Downs	20.8	on the 29th	18.8	on the 10th in 2020	21	9.0




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Record lowest September temperature
	New record (°C)		Old record		Years of record	Average for September
Busselton Aero	0.3	on the 7th	0.9	on the 17th in 2016	26	7.8
North Walpole	2.9	on the 7th	3.4	on the 26th in 2009	20	9.2




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Record highest September mean daily minimum temperature
	New record (°C)	Old record		Years of record	Average for September
Cape Leeuwin	13.3	= 13.3	in 1898	126	11.8
Narrogin	8.5	8.2	in 1983	105	6.0
Dwellingup	9.0	= 9.0	in 2013	85	6.5
Salmon Gums Res.Stn.	8.5	8.3	in 1983	84	5.7
Manjimup	9.0	8.9	in 1983	83	7.3
Kalgoorlie-Boulder Airport	12.4	10.4	in 2014	82	8.1
Perth Airport	11.1	= 11.1	in 1963	79	8.9
Meekatharra Airport	15.9	14.4	in 1981	73	11.6
Bencubbin	10.7	9.8	in 2014	72	7.3
Giles Meteorological Office	15.7	15.5	in 2020	67	13.0
Eyre	9.6	9.4	in 1918	63	7.6
Pearce RAAF	11.0	10.5	in 1996	62	8.8
Ravensthorpe	10.4	8.9	in 2019	61	7.5
Merredin	9.7	9.6	in 2014	57	6.8
Onslow Airport	18.5	18.1	in 2020	57	15.5
Karnet	9.7	8.9	in 1977	56	7.3
Wongan Hills	10.0	9.6	in 2014	56	7.6
Esperance	11.9	10.8	in 2014	54	9.6
Hyden	8.8	7.7	in 2013	50	5.9
Learmonth Airport	15.5	= 15.5	in 1981	48	13.8
Warburton Airfield	15.8	15.3	in 1944	48	11.5
Emu Creek Station	16.1	= 16.1	in 1981	47	14.0
Carnegie	14.2	14.0	in 2014	33	11.5
Jandakot Aero	11.1	10.8	in 2013	33	8.3
Rottnest Island	14.3	14.1	in 2014	33	12.9
Windy Harbour	10.7	= 10.7	in 2020	33	9.4
Esperance Aero	10.7	9.5	in 1999	31	8.4
Laverton Aero	15.0	13.7	in 2014	31	10.6
Forrest	10.4	= 10.4	in 2013	30	8.1
Jacup	8.4	7.5	in 2013	30	6.3
Swanbourne	13.1	12.5	in 2020	30	11.0
Bickley	10.6	9.6	in 2014	29	8.3
Leinster Aero	14.6	13.5	in 2014	29	10.7
Perth Metro	12.1	11.6	in 2013	29	9.6
Mount Magnet Aero	14.0	13.1	in 2014	28	10.5
Newdegate Research Station	7.8	6.5	in 2020	27	4.9
Paraburdoo Aero	16.5	16.0	in 2020	27	13.8
Rocky Gully	8.8	8.2	in 2013	27	7.2
York	7.1	7.0	in 2013	27	4.7
Hopetoun North	11.1	10.0	in 2020	26	8.6
Lake Grace	9.1	8.1	in 2013	26	6.5
Morawa Airport	11.2	10.9	in 2014	26	7.8
Newman Aero	15.8	14.7	in 2020	26	12.3
Southern Cross Airfield	9.8	9.0	in 2014	26	5.5
Barrow Island Airport	21.4	21.3	in 2020	24	19.6
Katanning	8.2	7.8	in 2013	24	6.2
Norseman Aero	10.4	8.1	in 2020	23	6.4
Mandurah	13.7	13.6	in 2013	21	11.8
Munglinup West	10.0	8.7	in 2014	21	7.4
Bulga Downs	13.0	11.6	in 2014	20	9.0




Highest September mean daily minimum temperature for at least 20 years
	Observed (°C)	Most recent higher		Average for September
Eucla	11.7	11.8	in 1916*	9.2
Albany	11.2	11.5	in 1918*	9.4
Cape Naturaliste	12.0	12.2	in 1983	10.4
Gingin Aero	9.6	11.0	in 1996	7.4

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




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Record highest September mean temperature
	New record (°C)	Old record		Years of record	Average for September
Cape Leeuwin	15.9	15.8	in 2014	126	14.5
Cape Naturaliste	15.8	15.4	in 2020	119	13.9
Northam	16.6	16.2	in 1914	118	13.7
Narrogin	14.9	13.9	in 2019	104	11.9
Eucla	18.7	18.1	in 2013	102	15.3
Dwellingup	14.3	13.9	in 2014	85	11.9
Salmon Gums Res.Stn.	17.2	15.4	in 1981	84	13.1
Manjimup	14.1	13.6	in 2019	83	12.0
Kalgoorlie-Boulder Airport	19.8	18.2	in 2019	82	15.2
Perth Airport	16.9	16.4	in 2014	79	14.6
Meekatharra Airport	23.4	21.7	in 2019	73	18.7
Giles Meteorological Office	23.4	= 23.4	in 2013	67	20.3
Eyre	17.7	16.4	in 2014	63	14.5
Pearce RAAF	16.8	16.2	in 2014	62	14.5
Ravensthorpe	16.5	15.9	in 2019	61	13.5
Mandora	26.6	= 26.6	in 2020	60	24.8
Merredin	16.7	= 16.7	in 2019	57	13.7
Onslow Airport	26.0	25.5	in 2020	57	22.9
Karnet	14.6	14.1	in 2014	56	12.5
Wongan Hills	17.2	16.5	in 2019	56	14.2
Brookton	14.4	14.3	in 2014	55	12.3
Esperance	17.2	16.3	in 2019	54	14.5
Beverley	15.4	15.2	in 2014	53	13.2
Pingelly	15.1	14.8	in 2019	51	12.5
Hyden	17.0	15.9	in 2019	50	13.3
Learmonth Airport	24.2	23.7	in 2020	48	21.6
Warburton Airfield	24.0	23.1	in 2014	48	19.8
Emu Creek Station	24.9	24.5	in 1981	47	22.3
Paynes Find	19.5	19.0	in 2014	44	16.0
Jarrahwood	14.1	13.6	in 2014	41	12.2
Carnegie	23.3	22.9	in 2020	33	20.2
Jandakot Aero	16.5	15.9	in 2014	33	14.2
Rottnest Island	17.3	17.1	in 2014	33	15.9
Windy Harbour	14.8	14.6	in 2014	33	13.5
Esperance Aero	16.5	15.5	in 2014	31	13.7
Laverton Aero	22.1	20.9	in 2014	31	17.6
Forrest	19.2	18.3	in 2013	30	16.4
Jacup	15.3	14.6	in 2019	30	12.6
Swanbourne	17.2	17.1	in 2014	30	15.5
Bickley	15.2	14.7	in 2019	29	13.0
Leinster Aero	22.3	21.0	in 2014	29	18.2
Perth Metro	17.2	16.7	in 2014	29	15.1
Mount Magnet Aero	21.6	20.8	in 2019	28	17.6
Bunbury	15.4	15.3	in 2014	27	13.6
Gingin Aero	16.5	= 16.5	in 1996	27	14.2
Newdegate Research Station	15.4	13.9	in 2019	27	12.0
Paraburdoo Aero	25.7	24.8	in 2020	27	22.6
Rocky Gully	14.0	13.3	in 2019	27	11.9
York	15.5	14.5	in 2014	27	12.6
Cunderdin Airfield	16.0	15.1	in 2014	26	13.0
Dalwallinu	17.2	16.8	in 2014	26	14.1
Hopetoun North	16.4	15.7	in 2019	26	14.4
Lake Grace	16.0	15.1	in 2019	26	13.0
Newman Aero	24.7	24.0	in 2020	26	21.4
Southern Cross Airfield	17.8	16.7	in 2014	26	13.7
Busselton Aero	14.5	= 14.5	in 2013	25	13.1
Barrow Island Airport	25.1	25.0	in 2020	24	23.4
Bridgetown	13.2	13.1	in 2014	24	11.9
Katanning	14.0	13.5	in 2019	24	11.9
Wandering	13.7	13.1	in 2014	24	11.6
Norseman Aero	18.6	16.4	in 2019	23	14.4
Garden Island HSF	16.9	16.8	in 2014	21	15.5
Munglinup West	16.9	15.6	in 2019	21	13.8
Bulga Downs	21.3	20.0	in 2019	20	17.3




Highest September mean temperature for at least 20 years
	Observed (°C)	Most recent higher		Average for September
Albany	15.4	15.5	in 1918*	13.3

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





Extremes Maps Records Summaries Important notes the top

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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
North Kimberley (district 01)
Doongan	34.9	-0.6	37.2	28th	17.0	-0.7	11.0	13th	0	4.8	lowest	0%
Kalumburu	35.6	-0.4	38.3	24th	19.6	+0.4	16.9	13th	0	1.9	lowest	0%
Troughton Island	30.9	+0.5	32.5	12th	24.8	+0.1	22.1	13th	0	0.3	lowest	0%
Truscott	32.9	-0.5	36.3	10th	21.3	-0.7	19.2	2nd	0	0.7	lowest	0%
Wyndham Aero	37.5	-0.4	39.9	24th	20.6	-1.0	16.3	2nd	1.8	3.6	high	50%
East Kimberley (district 02)
Argyle Aerodrome	36.4	-0.3	38.5	28th	21.7	-0.7	17.6	2nd	0	2.4	lowest	0%
Halls Creek Airport	35.1		38.5	26th	16.8		13.2	2nd	0
Kununurra Aero	36.8	0.0	39.8	22nd	17.9	-1.9	12.4	1st	0	4.9	lowest	0%
Warmun					19.3	-0.1	14.5	3rd	0	4.4	lowest	0%
West Kimberley (district 03)
Broome Airport	32.7	+0.8	38.2	11th	19.1	+0.6	14.0	2nd	0.4	1.4	average	29%
Curtin Aero	36.9	+0.1	40.2	24th	17.9	-0.4	12.6	2nd	0.2	1.3	high	15%
Derby Aero	36.2	+0.6	39.9	22nd	18.4	-0.9	12.8	1st	5.0	1.4	v high	357%
Fitzroy Crossing Aero	38.2	+0.7	41.4	27th	17.9	-0.7	12.9	1st	0	0.5	lowest	0%
Yampi Sound (Defence)	37.6		41.7	23rd	15.9		10.3	2nd	7.2
De Grey (district 04)
Karratha Aero	33.5	+2.5	38.8	30th	19.0	+1.9	14.1	6th	0	1.4	lowest	0%
Legendre Island	29.8	+1.6	33.8	30th	22.1	+1.6	19.3	3rd
Mandora	36.2	+2.3	42.8	28th	16.9	+1.2	10.4	4th	1.0	1.0	high	100%
Marble Bar	37.4	+2.7	41.9	30th	18.7	+1.9	12.3	6th	0	4.1	lowest	0%
Port Hedland Airport	35.6	+3.1	42.3	26th	17.9	+2.4	13.4	5th	0.2	1.2	average	17%
Roebourne Aero	35.9	+2.3	41.4	26th	16.7	+1.2	11.5	1st	0	2.1	lowest	0%
Fortescue (district 05)
Barrow Island Airport	28.7	+1.6	34.3	28th	21.4	+1.8	17.2	8th	0	1.2	lowest	0%
Karijini North	35.3		39.9	29th	19.3		13.5	1st	0
Learmonth Airport	32.8	+3.3	40.7	28th	15.5	+1.7	12.1	4th	0	2.2	lowest	0%
Mardie	35.1	+2.8	41.7	27th	16.5	+2.0	12.3	6th	0	1.3	lowest	0%
Onslow Airport	33.5	+3.3	41.7	28th	18.5	+3.0	14.9	5th	0.2	1.5	average	13%
Thevenard Island	29.2	+1.4	39.1	28th	20.4	+1.6	17.0	9th	0.4	1.4	low	29%
West Gascoyne (district 06)
Carnarvon Airport	25.7	+1.1	34.0	27th	15.2	+1.3	11.0	1st	0.2	6.3	v low	3%
Emu Creek Station	33.9	+3.2	41.4	28th	16.1	+2.1	12.8	1st	0	2.4	lowest	0%
Murchison	31.1	+4.7	39.5	28th			12.5	7th	0	8.1	lowest	0%
Shark Bay Airport	26.8	+0.8	36.6	27th	14.4	+1.7	11.2	5th	0.2	8.1	lowest	2%
East Gascoyne (district 07)
Newman Aero	33.7	+3.2	38.1	29th	15.8	+3.5	8.6	5th	0	4.6	lowest	0%
Paraburdoo Aero	34.9	+3.5	40.2	29th	16.5	+2.7	11.3	4th	0	3.5	lowest	0%
Murchison (district 07A)
Meekatharra Airport	30.8	+5.0	38.5	29th	15.9	+4.3	7.1	4th	0.2	4.9	low	4%
Mount Magnet Aero	29.2	+4.4	38.3	28th	14.0	+3.5	7.7	4th	2.6	10.8	low	24%
Paynes Find	28.1	+4.2	38.2	28th	11.3	+3.2	4.1	8th	5.4	14.0	low	39%
North Coast (district 08)
Dalwallinu	25.2	+3.9	36.7	28th	9.1	+2.2	0.6	7th	14.2	22.5	low	63%
Geraldton Airport	24.4	+1.1	39.0	27th	10.6	+1.4	4.3	7th	13.4	28.1	average	48%
Kalbarri	25.2	+1.1	38.5	27th	13.0	+2.1	9.0	5th	9.2	23.3	low	39%
Morawa Airport	26.3	+3.0	38.2	27th	11.2	+3.4	6.5	5th	10.4	21.6	low	48%
Mullewa	26.9	+3.4	38.5	27th	11.0	+2.4	6.3	5th	8.9	21.3	low	42%
North Island	23.0	+0.8	25.0	8th	16.4	+0.5	10.7	11th	7.4	19.0	low	39%
Wongan Hills	24.2	+3.4	35.4	28th	10.0	+2.4	1.7	7th	31.6	29.2	average	108%
Central Coast (district 09)
Badgingarra Research Stn	22.7	+2.1	35.2	27th	9.5	+1.9	4.9	18th	35.8	48.0	average	75%
Bickley	19.7	+2.0	31.3	27th	10.6	+2.3	2.8	7th	109.0	123.0	average	89%
Garden Island HSF	20.2	+1.2	33.2	27th	13.6	+1.7	6.7	7th	46.0	62.4	average	74%
Gingin Aero	23.0	+2.1	35.2	27th	9.6	+2.2	0.8	7th	60.6	74.9	average	81%
Jandakot Aero	21.9	+1.7	34.1	27th	11.1	+2.8	4.1	7th	67.0	82.9	average	81%
Jurien Bay	23.4	+2.0	35.2	27th			6.3	9th	37.6	42.8	average	88%
Karnet	19.4	+1.7	31.4	27th	9.7	+2.4	2.9	7th	82.7	130.3	low	63%
Millendon (Swan Valley)	22.8		33.7	27th	10.8		5.8	18th	75.6
Pearce RAAF	22.6	+2.4	34.1	27th	11.0	+2.2	5.5	18th	66.4	67.6	average	98%
Perth Airport	22.7	+2.4	34.9	27th	11.1	+2.2	5.4	26th	58.6	72.4	average	81%
Perth Metro	22.3	+1.8	34.3	27th	12.1	+2.5	5.2	7th	44.6	80.6	low	55%
Rottnest Island	20.3	+1.4	32.8	27th	14.3	+1.4	8.5	7th	35.0	52.1	low	67%
Swanbourne	21.2	+1.3	34.7	27th	13.1	+2.1	5.8	7th	54.0	78.5	low	69%
South Coast (district 09A)
Albany	19.6	+2.3	24.1	27th	11.2	+1.8	7.0	7th	71.0	100.9	low	70%
Albany Airport	20.2	+1.8	29.0	27th	8.8	+0.5	3.5	7th	62.2	90.7	average	69%
Bridgetown	19.1	+1.4	26.9	22nd	7.3	+1.3	-0.9	7th	81.8	86.0	average	95%
Bunbury	20.2	+1.5	30.3	27th	10.5	+2.0	2.1	7th	72.4	79.5	average	91%
Busselton Aero	19.9	+1.5	28.8	27th	9.1	+1.3	0.3	7th	134.2	75.9	v high	177%
Cape Leeuwin	18.5	+1.4	23.6	27th	13.3	+1.5	7.9	7th	47.4	89.0	low	53%
Cape Naturaliste	19.6	+2.2	27.5	27th	12.0	+1.6	5.4	7th	63.4	75.1	average	84%
Collie East	20.5	+2.0	30.6	28th	7.2	+1.6	-1.2	7th	81.4	88.8	average	92%
Dwellingup	19.7	+2.3	30.2	27th	9.0	+2.5	0.7	7th	128.6	129.3	average	99%
Esperance	22.5	+3.0	32.8	22nd	11.9	+2.3	6.3	8th	64.6	60.4	average	107%
Esperance Aero	22.2	+3.1	31.5	22nd	10.7	+2.3	5.1	8th	24.2	56.9	v low	43%
Hopetoun North	21.8	+1.7	29.6	27th	11.1	+2.5	4.0	8th	22.4	48.7	low	46%
Jarrahwood	20.7	+2.4	30.5	27th	7.2	+1.2	-1.5	7th	119.6	102.7	high	116%
Mandurah	20.1	+0.9	30.8	27th	13.7	+1.9	6.3	7th	16.6	58.7	lowest	28%
Manjimup	19.2	+2.6	28.8	27th	9.0	+1.7	1.6	7th	125.6	107.2	high	117%
North Walpole	19.0	+1.6	28.3	27th	10.3	+1.1	2.9	7th	113.8	107.0	average	106%
Rocky Gully	19.1	+2.4	26.6	27th	8.8	+1.6	0.2	7th	63.0	92.2	low	68%
Shannon	18.0	+1.5	23.5	28th	8.6	+1.2	0.5	7th	135.0	112.0	average	121%
Windy Harbour	18.8	+1.1	28.6	27th	10.7	+1.3	3.8	7th	83.6	111.2	low	75%
Witchcliffe West	18.2		27.9	27th	10.2		2.1	7th	53.2
North Central (district 10)
Bencubbin	25.8	+4.8	36.0	28th	10.7	+3.4	1.7	8th	13.1	21.5	low	61%
Cunderdin Airfield	24.7	+3.6	35.9	22nd	7.3	+2.4	-2.0	7th	31.2	26.0	high	120%
Merredin	24.3	+3.7	34.0	29th	9.7	+2.9	0.6	7th	15.3	25.4	low	60%
Northam	23.8	+3.3	34.7	28th	9.3	+2.4	0.9	7th	32.3	36.9	average	88%
York	23.7	+3.3	35.0	28th	7.1	+2.4	-1.0	7th	41.9	38.0	average	110%
South Central (district 10A)
Beverley	23.4	+2.9	34.8	28th	7.7	+1.9	-0.2	7th	38.2	36.0	average	106%
Brookton	22.1	+2.8	33.4	22nd	6.7	+1.3	-0.1	7th	31.7	38.1	average	83%
Hyden	24.9	+4.3	34.5	27th	8.8	+2.9	2.0	18th	18.8	27.3	average	69%
Jacup	22.3	+3.3	32.9	28th	8.4	+2.1	-0.9	7th	26.8	41.9	average	64%
Katanning	19.8	+2.2	28.8	22nd	8.2	+2.0	0.7	7th	43.2	49.2	average	88%
Lake Grace	22.9	+3.5	33.5	28th	9.1	+2.6	-0.1	7th	16.4	25.5	average	64%
Narrogin	21.4	+3.6	31.9	22nd	8.5	+2.5	-0.3	7th	47.8	46.2	average	103%
Newdegate Research Station	22.9	+3.9	34.1	28th	7.8	+2.9	0.3	7th	21.4	32.2	average	66%
Pingelly	21.7	+3.2	32.9	28th	8.2	+1.7	0.9	7th	33.6	40.5	average	83%
Ravensthorpe	23.1	+3.5	32.5	28th	10.4	+2.9	3.1	7th	23.0	41.4	low	56%
Wagin	21.2	+2.9	31.0	22nd	7.8	+1.6	-0.2	7th	28.5	40.8	average	70%
Wandering	21.0	+2.5	31.6	22nd	6.5	+1.7	-1.1	7th	62.0	56.8	average	109%
Eucla (district 11)
Eucla	25.8	+4.4	36.1	29th	11.7	+2.5	3.8	8th	5.4	21.8	low	25%
Eyre	25.8	+4.4	37.9	11th	9.6	+2.0	-5.2	8th	6.8	23.7	low	29%
Forrest	28.0	+3.4	37.0	29th	10.4	+2.3	0.8	8th	5.6	12.9	average	43%
Red Rocks Point	23.6	+2.1	36.2	11th	11.4	+1.4	3.5	8th	6.4	22.8	low	28%
South East (district 12)
Bulga Downs	29.7	+4.2	38.6	29th	13.0	+4.0	3.9	7th	1.6	7.7	average	21%
Kalgoorlie-Boulder Airport	27.2	+4.8	37.9	29th	12.4	+4.3	2.8	7th	2.4	13.4	low	18%
Laverton Aero	29.2	+4.5	37.6	29th	15.0	+4.4	5.7	4th	1.0	7.4	low	14%
Leinster Aero	30.0	+4.4	37.9	29th	14.6	+3.9	6.3	5th	0.2	4.1	low	5%
Leonora Aero	29.4	+4.1	38.3	29th	14.6	+4.3	6.5	4th	7.2	8.2	high	88%
Munglinup West	23.8	+3.6	33.1	28th	10.0	+2.6	2.2	7th	28.8	36.2	average	80%
Norseman Aero	26.7	+4.3	38.7	29th	10.4	+4.0	0.0	7th	3.0	17.9	low	17%
Salmon Gums Res.Stn.	25.9	+5.4	37.5	29th	8.5	+2.8	0.1	8th	8.6	30.9	low	28%
Southern Cross Airfield	25.8	+3.9	36.8	29th	9.8	+4.3	-0.7	7th	19.2	19.7	average	97%
North East (district 13)
Carnegie	32.5	+3.7	38.4	22nd	14.2	+2.7	6.5	8th	0	4.0	lowest	0%
Giles Meteorological Office	31.0	+3.4	37.1	30th	15.7	+2.7	5.8	8th	0	10.2	lowest	0%
Telfer Aero	35.9	+3.0	40.6	25th	19.0	+2.4	12.8	1st	0	2.5	lowest	0%
Warburton Airfield	32.2	+4.1	39.3	30th	15.8	+4.3	7.7	5th	0	5.4	lowest	0%
Wiluna Aero	31.3		38.0	29th	15.1		4.7	5th	3.4
Offshore Islands
Adele Island	29.8		31.7	23rd	25.1		23.5	5th
Varanus Island	28.0	+0.9	31.6	29th	22.3	+1.3	19.4	3rd	0	0.6	lowest	0%

Extremes Maps Records Summaries Important notes the top

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Notes

The Monthly climate summary, usually published in the first week of the following month, lists the main features of the weather in Western Australia 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 9 am on Monday 2 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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