Tuesday, 1 August 2017 - Monthly Climate Summary for Western Australia - Product code IDCKGC11R0

Western Australia in July 2017: Very warm daytime temperatures; average rainfall in southwest

Daytime temperatures in July 2017 were above average for most of Western Australia and the state-wide averaged mean maximum temperature was the highest on record. Mean minimum temperatures varied across WA, and the state-wide average was close to average. Rainfall was below average across large parts of the State, with WA as a whole recording below average rainfall, whilst the South West Land Division recorded near average rainfall.

Below average rainfall for most WA; near average for South West Land Division

• Rainfall for WA as a whole was below average
• Rainfall for WA for winter so far (June-July) was 4th-lowest on record, driest since June-July 2007
• Rainfall for the South West Land Division (SWLD) was near average
• Rainfall totals were less than 20 mm in the central and southeast WA; Eucla town had its driest July for 6 decades
• A few sites near the SWLD south coast had their highest total July rainfall for at least 20 years as a result of frequent cold fronts impacting on the region

Record high mean maximum temperature for WA

• The mean maximum temperature for WA was 2.3 °C above average and ranked highest in July; the previous record was 2.1 °C in July 2002
• Some sites in the Kimberley, Pilbara, and Southern Interior had their warmest July on record or warmest for at least 20 years
• Very warm days with temperatures in the mid-thirties were observed in the north on the 14th, 27th and 28th; several sites had their warmest July day on record
• Eucla and Forest in southeast WA reported their first temperature at or above 30  °C in July on the 28th
• Very cold days were recorded in southwest WA on the 1st and 5th; a number of sites had their coldest July day on record with a maximum temperature below 10 °C
• A mild to warm day was recorded near the west coast on the 18th; it was the warmest July day on record at Morawa Airport of the Central West district
• The mean minimum temperature for WA was about 0.4 °C above average
• The Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) recorded a mean minimum temperature 1.0 °C above average; highest for 10 years
• A few sites in the Lower Southwest recorded their equal highest July mean minimum or highest in July for over 20 years
• Laverton Aerodrome in the Goldfields had its equal coldest July nights on record
• Very cold nights with freezing temperatures were experienced in central and southeastern WA during July; a number of records were broken
• A few sites near the Lower West coast and in the Great Southern had their warmest July night on record in mid-July or late July

Extremes Maps Records Summaries Important notes the top

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Extremes in July 2017
Hottest day	36.3 °C at Bidyadanga on the 27th
Warmest days on average	34.4 °C at Kalumburu
Coolest days on average	13.9 °C at Shannon
Coldest day	8.8 °C at Katanning on the 1st 8.8 °C at Dwellingup on the 5th
Coldest night	-4.0 °C at Bulga Downs on the 5th
Coolest nights on average	2.3 °C at Bulga Downs
Warmest nights on average	25.8 °C at Browse Island 20.5 °C at Truscott
Warmest night	26.3 °C at Browse Island on the 19th 24.2 °C at Argyle Aerodrome on the 8th
Warmest on average overall	27.2 °C at Browse Island 26.5 °C at Truscott
Coolest on average overall	9.7 °C at Newdegate Research Station
Wettest overall	337.4 mm at Worsley Downs
Driest overall	0 mm at Argyle Aerodrome and other sites
Wettest day	59.0 mm at Worsley Downs on the 20th
Strongest wind gust	109 km/h at Cape Leeuwin on the 28th

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 July daily rainfall
	New record (mm)		Old record		Years of record
Beaumont West	27.0	on the 2nd	26.0	on the 13th in 2013	36

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Record highest July total rainfall
	New record (mm)	Old record		Years of record	Average for July
Denbarker	311.4	173.2	in 1991	43	113.9

Highest July total rainfall for at least 20 years
	Observed (mm)	Most recent higher		Average for July
Cowaramup	295.2	323.2	in 1986	222.7
Barrett Meadows	183.6	214.6	in 1991	152.3
Tamar	129.4	240.4	in 1991*	106.1

* 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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Lowest July total rainfall for at least 20 years
	Observed (mm)	Most recent lower		Average for July
Eucla	3.8	0.0	in 1955*	25.1

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

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Record highest July temperature
	New record (°C)		Old record		Years of record	Average for July
Eucla	30.3	on the 28th	29.3	on the 24th in 1917	98	17.9
Wittenoom	32.6	on the 28th	31.9	on the 24th in 2002	65	24.2
Mardie	34.5	on the 27th	34.4	on the 29th in 2015	61	27.7
Bidyadanga	36.3	on the 27th	35.7	on the 1st in 2016	58	29.5
Mandora	36.1	on the 28th	35.8	on the 27th in 2010	56	28.9
Onslow Airport	33.4	on the 14th	33.0	on the 24th in 2002	52	25.4
Learmonth Airport	31.7	on the 27th	31.1	on the 17th in 1979	43	24.2
Forrest	30.1	on the 28th	29.7	on the 24th in 2002	25	18.6
Karratha Aero	34.0	on the 28th	32.7	on the 17th in 2000	24	26.2
Morawa Airport	26.8	on the 18th	26.7	on the 18th in 2007	21	18.6

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Record lowest July daily maximum temperature
	New record (°C)		Old record		Years of record	Average for July
Newdegate Research Station	9.2	on the 1st	9.5	on the 11th in 2011	22	15.2
Lake Grace	9.0	on the 1st	9.6	on the 11th in 2011	21	15.6
Bridgetown	9.5	on the 1st	10.6	on the 11th in 2011	20	15.7

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Record highest July mean daily maximum temperature
	New record (°C)	Old record		Years of record	Average for July
Wittenoom	27.4	26.8	in 2002	64	24.2
Giles Meteorological Office	23.0	22.6	in 2002	60	20.0
Mandora	31.3	31.1	in 1973	55	28.9
Onslow Airport	27.9	27.5	in 2003	51	25.4
Telfer Aero	27.6	27.4	in 2000	43	25.3
Learmonth Airport	26.5	26.0	in 2003	42	24.2
Troughton Island	30.0	29.9	in 2016	37	28.2
Derby Aero	32.8	32.0	in 2016	32	30.7
Kununurra Aero	33.0	32.4	in 1990	30	30.6
Argyle Aerodrome	32.1	31.0	in 1998	23	29.7
Karratha Aero	28.0	27.7	in 2000	23	26.2

Highest July mean daily maximum temperature for at least 20 years
	Observed (°C)	Most recent higher		Average for July
Warmun	31.9	32.0	in 1975	29.5
Broome Airport	31.1	31.3	in 1988	28.9
Curtin Aero	32.1	32.7	in 1992	31.0

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Record highest July daily minimum temperature
	New record (°C)		Old record		Years of record	Average for July
Jurien Bay	17.8	on the 13th	17.3	on the 11th in 1992	48	9.3
Argyle Aerodrome	24.2	on the 8th	24.1	on the 27th in 1998	24	15.8
Swanbourne	15.8	on the 16th	= 15.8	on the 16th in 2016	24	9.6

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Record lowest July temperature
	New record (°C)		Old record		Years of record	Average for July
Giles Meteorological Office	-2.5	on the 8th	-1.1	on the 17th in 1961	61	6.8
Learmonth Airport	3.5	on the 10th	3.8	on the 19th in 1986	43	11.5
Laverton Aero	-3.3	on the 5th	-2.6	on the 28th in 1998	26	5.9

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Record highest July mean daily minimum temperature
	New record (°C)	Old record		Years of record	Average for July
Jandakot Aero	9.7	= 9.7	in 1996	27	6.7

Highest July mean daily minimum temperature for at least 20 years
	Observed (°C)	Most recent higher		Average for July
Gingin Aero	8.8	12.1	in 1996	6.2

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Record lowest July mean daily minimum temperature
	New record (°C)	Old record		Years of record	Average for July
Laverton Aero	3.9	= 3.9	in 2012	25	5.9

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Highest July mean temperature for at least 20 years
	Observed (°C)	Most recent higher		Average for July
Giles Meteorological Office	15.4	15.8	in 1973	13.4
Wittenoom	19.4	=19.4	in 1996	17.9

Extremes Maps Records Summaries Important notes the top

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Summary statistics for July 2017
	Maximum temperatures (°C)				Minimum temperatures (°C)				Rainfall (millimetres)
	Mean for July 2017	Diff from average	Highest for July 2017		Mean for July 2017	Diff from average	Lowest for July 2017		Total for July 2017	Average for July	Rank of July 2017	Fraction of July average
North Kimberley (district 01)
Kalumburu	34.4	+2.3	35.8	26th	16.0	+2.0	11.1	21st	0.2	1.7	average	12%
Troughton Island	30.0	+1.8	31.4	18th	23.6	+1.4	22.0	22nd	0.4	2.9	average	14%
Truscott	32.5	+1.9	34.0	4th	20.5	+2.1	17.5	22nd	0	2.3	v low	0%
Wyndham Aero	34.2	+2.3	35.7	31st	17.2	+1.9	11.1	22nd	0.4	2.7	high	15%
East Kimberley (district 02)
Argyle Aerodrome	32.1	+2.4	34.7	8th	18.0	+2.2	14.2	1st	0	1.5	lowest	0%
Halls Creek Airport	29.9		32.4	30th	11.7		8.1	18th	0
Kununurra Aero	33.0	+2.4	35.1	8th	15.6	+0.5	10.1	22nd	0	1.5	lowest	0%
Warmun	31.9	+2.4	34.1	30th	14.6	+1.9	10.0	1st	0	5.3	lowest	0%
West Kimberley (district 03)
Broome Airport	31.1	+2.2	35.6	27th	14.5	+0.8	10.5	16th	0.4	6.8	average	6%
Curtin Aero	32.1	+1.1	34.9	13th	16.7	+1.2	13.1	20th	0	8.6	lowest	0%
Cygnet Bay	28.6	+0.5	32.5	28th			12.5	17th	0	11.0	lowest	0%
Derby Aero	32.8	+2.1	35.7	27th	14.7	-0.1	11.7	10th	0	7.9	lowest	0%
Fitzroy Crossing Aero	32.8	+2.0	35.4	12th	13.1	+0.8	9.2	16th	0.2	6.3	average	3%
De Grey (district 04)
Bedout Island	25.7	+0.8	28.0	28th	20.2	+0.8	17.0	11th
Karratha Aero	28.0	+1.8	34.0	28th	13.2	-0.6	8.3	11th	0	14.3	lowest	0%
Legendre Island	25.6		30.3	28th	18.2		14.8	11th
Mandora	31.3	+2.4	36.1	28th	12.2	-0.3	5.7	16th	0	8.8	lowest	0%
Marble Bar	29.4	+2.2	34.6	28th	11.5	-0.7	5.4	11th	0	16.7	v low	0%
Pardoo Station					11.8	-1.3	6.0	11th	0	9.6	lowest	0%
Port Hedland Airport	29.2	+2.0	34.0	29th	12.9	+0.5	5.6	11th	0.4	10.8	low	4%
Roebourne Aero	29.8	+2.1	35.0	28th	10.7	-1.5	4.1	11th	0	9.7	v low	0%
Fortescue (district 05)
Barrow Island Airport	24.3	+0.6	27.8	14th	17.4	-0.2	12.5	11th	0.2	16.2	low	1%
Learmonth Airport	26.5	+2.3	31.7	27th	10.1	-1.4	3.5	10th	0	22.3	lowest	0%
Mardie	29.5	+1.8	34.5	27th	11.0	-0.8	7.4	9th	0	14.0	lowest	0%
Onslow Airport	27.9	+2.5	33.4	14th	12.9	-0.1	7.8	9th	0	20.3	lowest	0%
Wittenoom	27.4	+3.2	32.6	28th	11.5	0.0	5.0	10th	0	14.1	lowest	0%
West Gascoyne (district 06)
Carnarvon Airport	23.1	+0.7	30.4	27th	9.0	-1.9	4.1	10th	2.0	43.3	v low	5%
Denham	21.8	+0.1	25.0	28th	12.5	-0.2	9.5	10th	7.6	39.7	low	19%
Shark Bay Airport	22.9	+0.2	29.1	27th	9.1	-1.5	5.2	10th	4.2	30.2	v low	14%
East Gascoyne (district 07)
Newman Aero	25.0	+2.2	30.7	28th	5.6	-0.8	-0.5	10th	0	15.4	lowest	0%
Paraburdoo Aero	26.5	+1.8	32.0	28th	8.0	-1.9	2.1	10th	0	14.5	lowest	0%
Murchison (district 07A)
Meekatharra Airport	20.9	+1.8	27.4	26th	6.3	-1.1	1.6	3rd	1.0	21.0	v low	5%
Mount Magnet Aero	20.1	+1.4	27.1	27th	6.3	-0.7	1.3	3rd	7.0	29.0	v low	24%
Paynes Find	19.4	+0.9	26.3	27th	4.9	-0.6	-0.9	9th	14.8	35.1	low	42%
North Coast (district 08)
Dalwallinu	17.4	+0.6	24.7	18th	6.7	+0.9	2.5	3rd	34.4	47.4	average	73%
Geraldton Airport	20.2		26.8	18th	10.0		5.8	10th	49.2
Kalbarri	21.9	+0.1	26.1	18th			5.5	8th	58.2	70.1	average	83%
Morawa Airport	19.4	+0.8	26.8	18th	6.2	+0.1	0.9	9th	16.2	42.8	v low	38%
Mullewa	19.8	+1.0	27.0	18th	7.0	0.0	3.7	3rd	30.2	59.2	low	51%
North Island	21.5	+0.4	24.8	18th	15.1	-0.2	8.9	31st	25.4	68.1	v low	37%
Wongan Hills	17.3	+0.3	24.0	18th	7.4	+0.8	2.5	8th	46.8	69.3	low	68%
Central Coast (district 09)
Badgingarra Research Stn	17.7	+0.1	24.9	18th	7.7	+0.5	3.9	2nd	86.8	101.2	average	86%
Bickley	14.6	-0.5	20.7	18th	8.0	+0.9	3.8	6th	315.2	217.2	high	145%
Garden Island HSF	17.9	+0.2	23.0	18th	12.3	+1.2	7.2	6th	149.0	115.2	high	129%
Gingin Aero	18.2	-0.1	25.2	18th	8.8	+2.6	2.2	8th	139.8	126.5	average	111%
Gosnells City	18.4	-0.3	25.1	18th	10.5	+1.8	4.6	2nd	211.6	161.6	high	131%
Jandakot Aero	18.1	+0.2	24.5	18th	9.7	+3.0	3.5	8th	191.2	173.5	average	110%
Lancelin	19.4	+0.2	25.8	18th	11.3	+1.5	7.0	2nd	130.7	120.2	average	109%
Millendon (Swan Valley)	18.1		24.2	18th	9.5		3.2	8th	158.4
Pearce RAAF	18.5	+0.7	24.8	18th	9.7	+1.4	1.9	8th	173.8	134.2	high	130%
Perth Airport	18.1	+0.2	24.6	18th	9.7	+1.7	3.2	8th	180.0	155.7	high	116%
Perth Metro	18.4	0.0	25.0	18th	10.2	+2.5	4.9	8th	172.6	167.7	average	103%
Rottnest Island	18.0	+0.3	23.0	18th	12.9	+0.6	9.1	2nd	100.4	113.1	average	89%
Swanbourne	18.3	-0.1	24.8	18th	11.4	+1.8	6.7	6th	175.0	149.4	average	117%
South Coast (district 09A)
Albany	15.9	+0.1	20.6	12th	8.4	+0.2	6.0	10th	151.9	142.6	average	107%
Albany Airport	15.9		19.8	11th	7.5		4.0	27th	130.0
Bridgetown	15.1	-0.6	20.6	18th	5.1	+0.6	-0.4	6th	201.4	128.4	v high	157%
Bunbury	17.1	-0.2	22.3	18th	7.7	+0.7	-0.3	2nd	177.4	141.5	high	125%
Busselton Aero	16.4	-0.4	19.9	18th	6.9	+0.2	1.1	9th	164.2	135.4	high	121%
Cape Leeuwin	16.5	+0.1	19.9	18th	11.8	+0.5	9.4	2nd	179.8	180.3	average	100%
Cape Naturaliste	16.8	+0.5	20.5	18th	11.0	+0.6	6.5	2nd	149.8	160.6	average	93%
Collie East	15.6	-0.6	21.3	18th	4.6	+0.8	-1.8	6th	198.0	130.7	high	151%
Donnybrook	16.4	-0.1	21.9	18th	5.9	+0.2	0.0	6th	230.5	186.3	high	124%
Dwellingup	14.9	-0.1	21.1	18th	6.6	+1.2	1.8	2nd	286.4	234.4	high	122%
Esperance	17.2	0.0	21.1	26th	8.3	0.0	4.3	10th	134.4	96.3	high	140%
Esperance Aero	16.7	+0.4	20.0	26th	6.9	-0.7	3.7	31st	84.6	78.4	average	108%
Hopetoun North	17.8	-0.2	21.9	26th	7.6	-0.1	2.3	31st	40.6	68.8	low	59%
Jarrahwood	16.0	-0.4	20.0	18th	4.8	0.0	-0.5	9th	247.2	181.2	high	136%
Mandurah	17.4	0.0	21.4	18th	11.6	+1.0	7.2	2nd	139.4	115.1	high	121%
Manjimup	14.4	0.0	20.2	18th	6.5	+0.1	2.0	9th	195.8	174.1	average	112%
North Walpole	15.3	-0.7	19.2	18th	9.0	+0.2	5.4	4th
Rocky Gully	14.2	-0.5	18.5	18th	6.5	0.0	2.1	6th	171.6	106.0	high	162%
Shannon	13.9	-0.9	18.8	18th	6.8	+0.3	3.0	4th	242.8	174.5	v high	139%
Witchcliffe	15.9	-0.5	19.0	27th	9.0	+1.0	4.7	9th	269.0	197.3	high	136%
North Central (district 10)
Bencubbin	16.5	+0.1	22.8	18th	6.6	+0.6	1.5	6th	20.5	45.2	low	45%
Cunderdin Airfield	17.6	+0.6	23.3	18th	6.2	+1.6	0.1	6th	40.8	49.9	low	82%
Merredin	17.0	+0.7	22.2	27th	6.2	+0.7	-1.0	6th	35.9	50.3	low	71%
Northam	17.5	+0.6	23.4	18th	6.7	+1.4	1.0	6th	71.5	82.1	average	87%
York	17.6	+0.6	23.6	18th	5.6	+2.0	-1.0	6th	58.4	70.6	average	83%
South Central (district 10A)
Beverley	16.9	+0.1	22.2	18th	6.2	+1.1	-0.4	6th	82.0	77.2	average	106%
Brookton	16.1	0.0	21.2	18th	4.5	0.0	-1.0	6th	94.2	85.0	average	111%
Corrigin	16.0	+0.6	20.4	27th	5.2	+0.4	-0.5	10th
Hyden	16.8	+0.4	22.0	27th	4.7	+0.1	0.0	10th	29.6	47.7	low	62%
Jacup	15.4	-0.2	19.2	11th	5.3	-0.3	0.9	10th	49.2	50.7	average	97%
Katanning	14.1	-0.6	18.1	12th	5.6	-0.3	2.0	6th	73.4	62.2	high	118%
Lake Grace	15.2	-0.4	19.7	27th	5.4	+0.1	1.0	6th	55.6	37.7	high	147%
Narembeen			22.2	27th	6.0	+0.6	0.1	6th	40.5	49.7	average	81%
Narrogin	14.7	+0.1	19.4	18th	5.0	-0.2	0.0	3rd	95.8	86.2	average	111%
Newdegate Research Station	15.2	0.0	19.8	27th	4.2	+0.1	-2.1	10th	52.0	48.0	average	108%
Ongerup	14.9	-0.1	18.5	11th	5.7	-0.1	1.5	10th	54.2	49.4	average	110%
Pingelly	15.4	0.0	20.6	18th			-2.0	4th
Ravensthorpe	16.2	-0.1	20.5	27th	6.4	-0.4	3.0	27th	43.3	47.3	average	92%
Wagin	15.0	-0.3	19.0	18th	7.0	+1.5	4.0	3rd	69.4	69.9	average	99%
Wandering	15.4	-0.3	20.1	18th	5.2	+1.3	-0.7	6th	124.0	94.2	high	132%
Eucla (district 11)
Eucla	20.0	+2.1	30.3	28th	6.8	-0.3	1.5	8th	3.8	25.1	v low	15%
Eyre	19.8	+1.6	30.0	28th	4.5	-1.2	-3.0	23rd	12.8	35.1	low	36%
Forrest	20.2	+1.6	30.1	28th	4.9	-0.2	-0.9	19th	2.2	15.5	low	14%
Red Rocks Point	19.7	+1.3	31.6	28th	7.5	0.0	3.4	8th	13.0	39.2	v low	33%
South East (district 12)
Bulga Downs	20.1	+1.0	27.3	19th	2.3	-2.6	-4.0	5th	4.6	23.7	low	19%
Kalgoorlie-Boulder Airport	18.0	+1.3	24.7	26th	5.7	+0.7	-0.6	5th	10.4	24.6	low	42%
Laverton Aero	19.4	+1.1	28.2	26th	3.9	-2.0	-3.3	5th	0.2	16.9	lowest	1%
Leinster Aero	20.0	+1.3	27.1	26th	5.1	-1.0	-1.1	7th	0.2	17.9	v low	1%
Leonora Aero	19.7	+0.9	27.2	26th	4.6	-1.6	-2.0	5th	7.8	18.3	low	43%
Munglinup West	16.6	0.0	21.8	19th	5.9	-0.7	1.7	31st	30.4	43.0	average	71%
Norseman Aero	17.7	+0.6	23.2	26th	4.2	+0.2	-1.4	10th	11.8	23.2	low	51%
Salmon Gums Res.Stn.	16.7	+0.6	21.6	26th	4.8	+0.2	-2.3	10th	27.6	36.7	average	75%
Southern Cross Airfield	16.6	0.0	22.4	27th	4.5	+1.1	-1.8	3rd	33.6	35.2	average	95%
Yeelirrie	20.6	+1.3	27.5	27th	4.7	+1.2	-2.2	5th	0	17.2	lowest	0%
North East (district 13)
Giles Meteorological Office	23.0	+3.0	29.8	29th	7.7	+0.9	-2.5	8th	2.6	11.1	average	23%
Telfer Aero	27.6	+2.3	33.0	28th	11.0	+0.3	5.1	8th	0	12.2	lowest	0%
Warburton Airfield	22.7	+2.0	29.7	28th	5.2	-0.5	-2.3	7th	2.4	12.5	average	19%
Wiluna	22.0	+2.6	28.5	27th	5.3	-0.2	-1.0	9th	0	14.9	lowest	0%
Offshore Islands (district 200)
Browse Island	28.7		29.7	25th	25.8		25.0	2nd
Note: Observations for “Perth Metro” are taken from the current site at Mount Lawley (Bureau number 009225). Comparisons are made against combined data from the current site (which opened in early 1993) and the previous site at Perth Regional Office (009034), which ran from 1876 to early 1992. From 2017 on, information about Cocos and Christmas Islands can be found in the climate summary for the Remote Islands and Antarctica

Extremes Maps Records Summaries Important notes the top

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