Western Australia in March 2012: wet and cool in the north, warm and dry in the southwest

  • Rainfall: Above average for WA, 5th driest March for southwest WA
  • Maximum temperature: below average for WA, 6th warmest March for southwest WA
  • Minimum temperature: below average for WA, near average for southwest WA.

Rainfall

Rainfall during March 2012 was above to very much above average in the Kimberley and adjacent parts of the Pilbara and Interior, mostly due to a monsoonal burst during the middle of the month. Above average rainfall was also observed in parts of the Gascoyne, Goldfields, Southeast Coastal, and western Eucla mostly as a result of ex-Tropical Cyclone Lua moving through central WA. In contrast, below average rainfall was observed in western and southern parts of the Southwest Land Division (SWLD) and the adjacent southwest Gascoyne, as well as in the eastern Interior and inland Eucla with little or no rainfall recorded during the month. When averaged across the state, March 2012 rainfall was above average, however the Lower Southwest (southwest a line from Jurien Bay to Bremer Bay) as a whole experienced its 5th driest March since comparable records commenced in 1900, though rainfall during March is typically low.

A trough extending across the Kimberley and northeast Interior resulted in scattered showers and thunderstorms in these regions in the first few days of March, with some heavy falls and daily totals up to 100 mm observed in the north and east Kimberley. An active monsoon across northern Australia continued to produce showers and thunderstorms in the Kimberley into the second week of the month and caused flooding in some communities. A tropical low off the Pilbara coast developed into Tropical Cyclone Lua in the afternoon of the 13th before eventually crossing the Pilbara coast near Pardoo Roadhouse on the 17th and tracking southwards through central WA in subsequent days. Edjudina in the Goldfields registered 75.0 mm on the 19th when ex-TC Lua passed through the region, the wettest March day in its 104 years of daily rainfall record. Troughton Island in the north Kmberley recorded a daily total of 260.6 mm on the 14th, which is its third wettest day in 27 years of record and more than double the previous March highest daily rainfall of 104.6 mm on 25 March 1964. This was also the highest daily rainfall recorded in WA in March 2012.

Dampier Downs in the west Kimberley recorded 341.6 mm in March, exceeding its previous wettest March of 340.3 mm in 2007, whilst Home Valley in the north Kimberley received 1194.0 mm, the wettest spot in WA during March 2012. From the 10th to the 15th, Home Valley experienced the brunt of a monsoonal burst with four days with over 100 mm, including a daily fall of 244.0 mm on the 13th.

A number of sites in western parts of the SWLD recorded very low or no measurable rainfall during March 2012, with several sites, particularly in the Southwest district, observing their driest March on record, the result of a lack of frontal or thunderstorm activity for much of the month. Cape Leeuwin recorded its driest March in 116 years of record.

Maximum temperature

Much of WA saw below to very much below average maximum temperatures in March, with areas up to 4 °C cooler than normal in the east Pilbara and far east Gascoyne. Above to very much above average maximum temperatures were confined to the west Gascoyne, western parts of SWLD, and the southeast Eucla, with up to 4 °C warmer than normal maxima in coastal parts of the southwest Gascoyne, and 3 °C warmer than normal maxima in the southwest Lower West and Southwest districts. When averaged across the state, the mean maximum temperature for WA during March 2012 was below average, however, daytime temperatures over the Lower Southwest were the 6th warmest for March on record. Comparable records commenced in 1950.

Widespread rainfall and overcast conditions brought a number of cooler than normal days to the east Pilbara during the passage of TC Lua. Several sites in the region experienced their coolest March day on record on the 17th, with Port Hedland Airport recording a daily maximum temperature of 24.1 °C, which is 12.7 °C below normal and 1.7 °C below the previous coolest March day on recordat the airport. Port Hedland Airport also experienced its coolest March in 63 years of record. Cool days were experienced through central WA over subsequent days as ex-TC Lua moved through the state bringing heavy rainfall and cloudy conditions, while a ridge to the south of the state and a deck of cloud over central parts saw very cool days persist in the Goldfields and southern coastal areas through to the 21st with daily maxima in the mid-to-high teens. In contrast to the cool weather over central parts of the state after the middle of the month, the first half of March 2012 saw very hot conditions at times in western parts of the Gascoyne and SWLD, with numerous locations observing multiple days of over 40 °C. Kalbarri in the Central West recorded a mean daily maximum temperature of 35.6 °C, exceeding the previous March record of 35.3 °C set last year.

Minimum temperature

March 2012 saw below average mean minimum temperatures in the Eucla, Goldfields, east Gascoyne, much of the Interior, east Pilbara, and parts of the Kimberley, with areas up to 3 °C cooler than normal in the northern Goldfields, eastern Gascoyne, and central Interior. Above average overnight temperatures were observed along the SWLD south coast, as well as in the Central West, west Gascoyne, and west Pilbara. When averaged across the state, the mean minimum temperature for WA was below average, whilst the Lower Southwest recorded near average overnight temperatures.

Other Phenomena

Tropical Cyclone Lua formed to the northwest of Karratha, well off the west Pilbara coast, on the afternoon of 13 March 2012. Lua moved northwestward and intensified to category two on the 15th before taking a u-turn and moving southeastward towards the WA coast. Lua intensified further to category 3 on the 16th and took a south-southeast track on the 17th as it intensified to category four and approached the east Pilbara coast. Lua crossed the coast near Pardoo Roadhouse on the afternoon of the 17th as a category four system. After landfall, Lua tracked southwards through the inland Pilbara and steadily weakened to below tropical cyclone strength on the morning of the 18th in the northeast Gascoyne. Significant damage was reported from Pardoo Roadhouse and the Yarrie mine site with uprooted trees and damage to buildings. TC Lua caused moderate to major flooding of the De Grey river system in the east Pilbara, particularly in the vicinity of Tumbinna Pool and Nullagine. Ex-TC Lua moved through the Goldfields, Southeast Coastal, and Eucla between the 19th and 20th, bringing some significant rainfall.

Further information

Media
(03) 9669 4057
Enquiries

Extremes in March 2012
Hottest day 44.6 °C at Kalbarri on the 9th
Warmest days on average 37.0 °C at Emu Creek Station
Coolest days on average 23.9 °C at Albany
Coldest day 17.4 °C at Kalgoorlie-Boulder Airport on the 21st
Coldest night 2.7 °C at Salmon Gums Res.Stn. on the 16th
Coolest nights on average 10.3 °C at Collie East
Warmest nights on average 26.7 °C at Varanus Island
25.1 °C at Onslow (mainland)
Warmest night 29.0 °C at Varanus Island on the 9th
29.0 °C at Onslow on the 10th
Wettest overall 1194.0 mm at Home Valley
Wettest day 260.6 mm at Troughton Island on the 14th
244.0 mm at Home Valley (mainland) on the 13th
Highest wind gust 109 km/h at Varanus Island on the 15th
96 km/h at Broome Airport 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 March daily rainfall
Highest daily rainfall
in March 2012 (mm)
Previous wettest
for March
Years of
record
Edjudina 75.0 on the 19th 66.8 on the 19th in 1927 104



Record highest total March rainfall
Total rainfall
for March 2012 (mm)
Previous wettest
for March
Years of
record
Average for
March
Dampier Downs 341.6 340.3 in 2007 38 92.9

 



Record lowest total March rainfall
Total rainfall
for March 2012 (mm)
Previous driest
for March
Years of
record
Average for
March
Cape Leeuwin 1.2 1.6 in 1983 116 28.0
Cape Naturaliste 0.2 0.6 in 1974 108 22.5
Pemberton 2.9 5.1 in 1974 72 36.6
Walpole 5.7 8.8 in 1983 61 44.5
Karnet 0.0 0.4 in 2011 49 23.4
Jarrahwood 0.0 1.2 in 1976 37 18.1
Munglinup Melaleuca 0.0 5.4 in 1977 36 27.2

 



Record lowest March daily maximum temperature
Lowest daily maximum
temperature
in March 2012 (°C)
Previous coolest
for March
Years of
record
Average for
March
Port Hedland Airport 24.1 on the 17th 25.8 on the 21st in 1965 64 36.8
Wittenoom 22.2 on the 17th 22.6 on the 29th in 1988 59 36.7
Roebourne 25.4 on the 17th 25.6 on the 2nd in 1961 54 37.6



Record highest March mean daily maximum temperature
Mean daily maximum
temperature
for March 2012 (°C)
Previous warmest
for March
Years of
record
Average for
March
Kalbarri 35.6 35.3 in 2011 38 32.6




Record lowest March mean daily maximum temperature
Mean daily maximum
temperature
for March 2012 (°C)
Previous coolest
for March
Years of
record
Average for
March
Port Hedland Airport 32.9 33.4 in 2000 63 36.8



Summary statistics for March 2012
Maximum temperatures
for March
(°C)
Minimum temperatures
for March
(°C)
Rainfall
for March
(millimetres)
Mean for
March
2012
Diff
from
average
Highest for
March
2012
Mean for
March
2012
Diff
from
average
Lowest for
March
2012
Total for
March
2012
Average
for
March
Rank of
March
2012
Fraction of
March
average
North Kimberley (district 01)
Doongan 31.5 -1.6 34.0 31st 22.2 +0.4 19.4 27th 668.4 209.9 v high 318%
Kalumburu 32.3 -1.2 35.6 30th 22.4 -1.1 18.9 27th        
Mount Elizabeth 31.3 -1.0 34.0 31st 21.5 +1.1 15.9 26th 271.3 165.1 high 164%
Troughton Island 31.3 -0.7 32.7 28th 26.1 -0.3 22.5 29th 518.2 145.3 v high 357%
Truscott 31.6   33.6 30th 24.7   22.7 29th  
Wyndham 33.6 -2.4 36.9 22nd 25.0 -0.5 19.2 26th 334.0 163.2 high 205%
Wyndham Aero 33.9 -1.6 36.9 22nd 25.0 -0.5 20.1 26th 258.4 158.1 high 163%
East Kimberley (district 02)
Argyle Aerodrome 33.9 -1.3 36.5 31st 24.2 -0.4 20.7 26th 268.2 164.9 high 163%
Halls Creek Airport 32.6 -2.8 35.5 31st 22.4 -0.4 17.3 26th 137.4 81.5 high 169%
Kununurra Aero 33.8 -1.7 36.5 31st 24.0 -0.2 18.9 26th 455.6 157.4 v high 289%
Warmun 34.0 -1.9 37.5 29th 23.4 +0.2 16.3 26th 132.6 121.4 average 109%
West Kimberley (district 03)
Bidyadanga 33.4 -1.9 38.2 5th 24.0 -0.9 19.8 3rd 358.8 98.3 v high 365%
Broome Airport 32.5 -1.4 36.1 5th 24.6 -0.8 21.7 4th 240.2 102.7 high 234%
Curtin Aero 33.6 -2.5 37.9 28th 23.4 -0.8 21.5 27th 497.0 174.3 v high 285%
Cygnet Bay 31.8 -1.9 34.8 31st 23.6 -0.9 19.9 23rd 430.4 175.0 v high 246%
Derby Aero 33.0 -2.2 36.4 28th 24.3 -0.7 22.7 4th 316.6 135.8 v high 233%
Fitzroy Crossing Aero 34.5 -2.0 37.6 31st 23.3 -0.7 20.8 27th 271.6 128.7 high 211%
West Roebuck 33.7 -1.0 37.4 5th 23.7 -0.6 20.2 3rd 287.6 173.1 high 166%
De Grey (district 04)
Bedout Island 31.2   34.0 6th 25.7   23.0 15th
Karratha Aero 33.2 -2.9 38.8 8th 24.7 -1.0 20.8 4th 57.6 51.3 high 112%
Legendre Island 31.5   35.4 8th 25.7   20.3 17th
Marble Bar 34.5 -3.0 39.8 29th 23.2 -1.8 19.5 18th 88.2 87.2 average 101%
Pardoo Station 33.6 -2.6 38.6 28th 23.1 -1.4 17.0 5th 131.3 64.6 high 203%
Port Hedland Airport 32.9 -3.9 38.5 29th 23.5 -1.0 18.5 4th 172.2 50.1 v high 344%
Roebourne 34.3 -3.3 39.6 29th 24.2 -1.1 20.1 4th 84.6 64.5 high 131%
Roebourne Aero 33.8 -3.7 38.9 5th 23.8 -1.4 18.3 4th 110.0 47.9 high 230%
Fortescue (district 05)
Barrow Island Airport 31.8 -1.4 35.5 30th 25.8 -0.7 22.9 17th 30.4 60.4 average 50%
Learmonth Airport 35.7 -0.7 39.6 30th 23.7 +0.8 20.3 6th 15.0 39.0 average 39%
Mardie 35.7 -1.9 40.9 6th 24.5 +0.4 20.8 18th 4.8 50.0 average 10%
Onslow 34.3 -1.1 39.5 30th 25.1 +1.8 22.1 18th 25.1 49.0 average 51%
Onslow Airport 35.7 -0.3 40.2 30th 24.8 +0.8 21.7 18th 6.0 73.3 average 8%
Thevenard Island 33.6 -0.2 37.9 6th 26.0 0.0 23.6 1st 7.0 26.1 average 27%
Wittenoom 33.4 -3.3 38.4 30th 22.9 -1.4 17.7 17th 28.8 69.7 average 41%
West Gascoyne (district 06)
Carnarvon Airport 34.3 +2.8 41.5 6th 22.1 0.0 17.9 5th 59.6 16.5 v high 361%
Denham 32.9 +1.9 40.2 6th 24.1 +2.1 20.3 21st 9.2 14.4 average 64%
Emu Creek Station 37.0 -1.4 41.2 7th 24.0 +0.2 21.1 18th 59.8 40.2 high 149%
Murchison 35.4 +0.2 41.0 8th 20.0 +0.1 15.5 4th 6.6 32.9 average 20%
Shark Bay Airport 35.9 +1.8 41.9 6th 21.7 +0.6 18.4 3rd 8.2 14.6 high 56%
East Gascoyne (district 07)
Newman Aero                 49.0 40.5 average 121%
Paraburdoo Aero 33.5 -3.1 39.1 15th 22.0 -1.2 16.8 18th 77.0 46.4 high 166%
Murchison (district 07A)
Meekatharra Airport 31.3 -3.0 38.3 14th 19.4 -1.9 13.8 18th 69.4 28.8 high 241%
Mount Magnet Aero 31.9 -1.1 39.7 13th 18.7 -1.4 13.3 21st 42.2 35.4 average 119%
North Coast (district 08)
Dalwallinu 31.4 -0.3 39.3 12th 15.9 -0.5 10.3 31st 0.8 22.4 v low 4%
Dalwallinu Comparison 31.5 -0.1 39.5 12th 16.8 +0.1 11.0 31st 1.0 23.9 low 4%
Geraldton Airport 33.7   43.5 9th 18.2   14.0 22nd 0
Geraldton Airport Comparison 33.5 +2.5 42.8 9th 18.4 +0.5 13.8 22nd 0 15.6 lowest 0%
Kalbarri 35.6 +3.0 44.6 9th 20.9 +1.8 15.6 30th 0 11.6 lowest 0%
Morawa Airport 33.7 +0.5 41.0 9th 17.8 -0.1 13.0 31st 2.4 14.9 average 16%
Mullewa 34.6 +0.9 40.8 9th 19.2 +0.9 14.7 22nd 0 18.6 lowest 0%
North Island 30.3 +2.2 37.4 6th 22.9 +1.0 20.3 3rd 1.4 2.4 average 58%
Wongan Hills 31.8 +0.9 40.5 12th 16.1 -0.3 9.5 31st 26.4 20.3 high 130%
Central Coast (district 09)
Badgingarra Research Stn 32.3 +0.3 40.1 9th 17.1 +0.7 10.7 31st 0.8 15.8 low 5%
Bickley 28.9 +0.8 38.1 12th 14.6 +0.1 10.0 31st 0 24.1 lowest 0%
Champion Lakes 30.5   39.6 11th 17.4   12.0 31st 0
Garden Island HSF 28.5 +1.1 37.7 11th 17.6 -0.7 13.5 31st 0.2 12.3 low 2%
Gingin Aero 32.0 +1.2 41.2 12th 15.2 0.0 5.9 31st 0 13.8 v low 0%
Gooseberry Hill 31.0 +1.1 40.5 10th 17.0 +0.6 12.3 20th
Gosnells City 32.3 +1.8 41.9 11th         0 15.7 lowest 0%
Jandakot Aero 31.3 +1.6 40.2 11th 15.0 -0.4 7.0 31st 0.2 14.9 v low 1%
Jurien Bay 31.1 +1.7 40.0 9th 16.4 -0.2 10.0 22nd 2.7 13.3 average 20%
Karnet 28.9 +1.0 38.2 11th 14.0 -0.1 6.5 1st 0 23.4 lowest 0%
Lancelin 30.9 +2.4 40.7 9th 16.1 -0.7 10.5 16th 0 13.8 lowest 0%
Medina Research Centre 31.1 +1.8 41.1 11th 15.8 -0.1 7.8 31st 0 18.3 v low 0%
Pearce RAAF 32.0 +1.5 41.8 12th 15.9 -0.1 6.0 31st 0.6 14.3 v low 4%
Perth Airport 31.6 +1.9 40.9 11th 15.6 -0.3 7.6 31st 0 15.7 lowest 0%
Perth Metro* 31.4 +1.8 41.1 11th 16.1 -0.5 9.0 31st 0.2 19.4 low 1%
Rottnest Island 28.0 +1.9 37.5 11th 19.1 +0.4 15.4 31st 1.4 14.3 low 10%
Swanbourne 30.5 +1.5 39.4 11th 17.1 -0.3 11.5 31st 0 20.0 v low 0%
South Coast (district 09A)
Albany 23.9 +1.7 37.3 6th 16.1 +1.4 10.2 16th 12.4 38.2 low 32%
Albany Airport 25.9   38.2 6th 13.5   6.6 16th 16.4
Albany Airport Comparison 25.8 +1.7 38.0 5th 13.5 +0.1 6.8 16th 9.6 32.6 v low 29%
Bridgetown 28.9 +1.2 38.3 10th 10.4 -1.3 5.6 16th 0 16.6 v low 0%
Bridgetown Comparison 29.5 +2.3 38.5 11th 10.9 +0.1 6.6 16th 0 25.7 lowest 0%
Bunbury 29.0 +1.3 37.8 11th 13.3 -0.9 7.6 22nd 0 14.1 v low 0%
Busselton Aero 29.0 +1.0 37.1 10th 12.3 -1.1 7.5 26th 0.2 14.8 v low 1%
Cape Leeuwin 25.3 +2.6 37.9 6th 17.8 +1.1 14.4 24th 1.2 28.0 lowest 4%
Cape Naturaliste 27.2 +2.8 33.2 11th 16.0 +1.0 11.6 15th 0.2 22.5 lowest 1%
Collie East 29.2   38.4 11th 10.3   4.2 31st 0 12.3 v low 0%
Donnybrook 30.2 +2.2 39.8 11th 14.0 +1.1 8.6 31st 0 24.3 lowest 0%
Dwellingup 29.4 +2.4 38.3 11th 12.8 -0.1 5.9 31st 0.2 25.8 v low 1%
Esperance 26.3 +1.1 40.7 12th 15.6 +0.5 10.3 16th 50.8 27.6 high 184%
Esperance Aero 26.3 +0.4 39.6 12th 14.6 +0.1 9.0 31st 48.0 31.4 high 153%
Harvey 30.1 +0.7 39.2 11th 14.0 -1.0 8.5 20th 0 11.0 v low 0%
Hopetoun North 25.9 +0.9 41.3 12th 14.7 +0.3 9.1 4th 16.8 27.4 average 61%
Jarrahwood 30.0 +2.4 38.5 11th 10.4 -1.2 5.2 21st 0 18.1 lowest 0%
Mandurah 28.9 +1.1 34.4 9th 17.9 -0.3 12.8 31st 0 13.9 v low 0%
Manjimup 27.7 +2.9 37.8 6th 12.7 +0.2 9.2 16th 1.4 29.8 v low 5%
North Walpole 25.5   38.1 6th 14.4   10.9 16th 4.4
Pemberton 27.3 +2.8 37.5 5th 13.2 +0.5 8.6 16th 2.9 36.6 lowest 8%
Rocky Gully 26.7 +1.4 37.1 5th 12.0 -0.5 5.3 16th 3.4 34.8 v low 10%
Windy Harbour 25.3 +1.9 39.4 6th 13.5 0.0 8.6 24th 5.3 30.2 v low 17%
Witchcliffe 27.5 +1.6 36.7 6th 13.0 +0.1 7.6 14th 1.4 19.7 v low 7%
North Central (district 10)
Bencubbin 30.4 -0.4 39.5 12th 16.0 -0.2 8.5 31st 7.2 22.6 average 32%
Cunderdin Airfield 31.6 +0.6 41.5 12th 14.4 -0.9 5.4 31st 5.8 15.4 average 38%
Kellerberrin 31.1 +0.8 41.0 12th         9.7 20.4 average 48%
Merredin 31.1 +0.8 40.7 12th 16.0 -0.2 8.8 31st 6.2 20.1 average 31%
Northam 32.1 +1.3 41.9 12th         0.2 18.1 low 1%
York 31.5 +0.7 41.5 12th         0 14.3 v low 0%
South Central (district 10A)
Beverley         13.9 -0.8 7.0 31st 0.8 16.2 low 5%
Brookton 30.7 +1.2 40.6 12th 13.9 -0.4 10.0 20th 2.8 17.6 low 16%
Corrigin 29.6 +0.7 40.0 12th 13.9 -0.4 10.1 31st 6.0 21.1 average 28%
Hyden 30.5 +0.5 41.1 12th 14.2 0.0 6.6 31st 17.5 19.6 average 89%
Katanning 28.1 +0.7 39.1 12th 12.7 -0.3 8.3 16th 3.6 14.6 low 25%
Katanning Comparison 28.2 +1.3 39.2 10th 12.4 -0.2 7.1 31st 0.8 22.1 v low 4%
Lake Grace 28.5 +0.3 39.3 10th 14.3 0.0 8.9 31st 9.2 15.7 average 59%
Lake Grace Comparison 28.4 +0.3 39.2 10th 14.1 0.0 8.8 31st 9.2 22.1 average 42%
Narembeen 30.9 +0.6 40.1 12th 14.9 +0.1 8.8 31st 21.0 20.1 high 104%
Narrogin 28.7 +1.4 38.7 12th 13.6 +0.6 6.6 31st 2.6 20.5 low 13%
Newdegate Research Station 28.6 +0.5 39.3 12th 11.7 -1.0 3.8 31st 8.2 20.3 average 40%
Ongerup 27.4 +1.5 38.4 12th 13.4 +0.2 8.5 31st 16.0 21.9 average 73%
Pingelly 29.6 +1.2 40.1 12th 14.5 -0.2 10.6 20th 6.0 16.8 average 36%
Ravensthorpe 27.5 +0.9 38.9 10th 14.5 +0.9 8.2 31st 26.6 30.9 average 86%
Wagin 29.0 +1.3 39.5 10th 12.8 -0.6 7.0 31st 5.8 19.8 average 29%
Wandering 29.8 +0.6 39.8 12th 11.8 -0.6 4.5 31st 0.4 12.5 v low 3%
Eucla (district 11)
Balladonia 27.4 -0.7 39.0 12th 13.5 0.0 7.5 31st 39.4 27.1 high 145%
Eucla 26.3 +1.2 38.9 13th 15.4 -0.5 10.6 4th 44.2 22.8 high 194%
Eyre 26.6 +1.0 39.5 12th 13.7 -0.6 4.2 5th 23.2 27.3 average 85%
Forrest 30.4 +1.4 39.0 13th 13.5 -0.8 7.3 4th 2.4 28.4 v low 8%
Red Rocks Point 24.9   38.9 19th 16.6   10.4 4th 17.8
South East (district 12)
Bulga Downs 30.6   39.5 13th 16.4   11.0 23rd 64.2 24.1 high 266%
Kalgoorlie-Boulder Airport 27.4 -2.1 38.3 12th 15.6 -0.5 9.8 2nd 70.0 24.8 v high 282%
Laverton Aero 29.4 -0.9 38.7 13th 17.0 -1.1 12.3 24th 47.4 37.1 average 128%
Leonora 29.6 -3.1 39.6 13th 16.6 -2.0 11.9 24th 68.2 28.8 v high 237%
Leonora Aero 29.4   39.3 13th 17.1   12.5 22nd 61.6
Munglinup West 27.4   39.6 12th 13.7   8.0 2nd 39.4 28.9 high 136%
Norseman Aero 27.3 -1.6 38.7 12th 13.4 -0.6 6.1 16th 65.8 28.3 high 233%
Salmon Gums Res.Stn. 27.4 +0.1 39.2 7th 12.2 -0.4 2.7 16th 61.4 24.8 v high 248%
Southern Cross Airfield 29.4 -1.3 39.7 12th 14.9 -0.1 9.0 31st 23.2 35.5 average 65%
Yeelirrie 30.4 -2.9 38.7 13th 16.4 -1.9 10.0 3rd 50.1 31.7 high 158%
North East (district 13)
Balgo Hills 33.9 -2.8 37.4 29th 22.7 -0.8 18.4 26th 127.7 46.8 high 273%
Carnegie 32.9 -1.0 38.9 30th 18.1 -1.8 11.4 2nd 23.7 33.0 average 72%
Giles Meteorological Office 31.5 -2.2 37.4 31st 18.1 -2.4 11.9 3rd 2.4 36.1 low 7%
Telfer Aero 34.9 -2.4 40.2 29th 23.3 -0.6 17.1 3rd 57.4 79.1 average 73%
Warburton Airfield 32.1 -1.8 39.2 30th 18.4 -1.5 13.3 23rd 0 31.1 lowest 0%
Offshore Islands (district 200)
Christmas Island Aero 26.7 -1.5 28.1 1st 22.6 -0.4 21.5 25th 690.0 301.1 v high 229%
Cocos Island Airport 30.2 +0.2 31.2 6th 25.2 0.0 23.9 3rd 207.2 230.4 average 90%
Varanus Island 31.8 -0.8 34.6 8th 26.7 -0.3 21.3 17th 29.4 51.1 average 58%

Notes

A Monthly Climate Summary is prepared to list 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. Later information, including data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review, usually published in the fourth week of the month.

This statement has been prepared based on information available at 9 am on Monday 2 April 2012. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Averages 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.

Records in this summary are based on sites with at least 30 years of data.

For PDF files of Perth Metro climate statistics for other months, please click here for extremes and here for averages.

Further information

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