South Australia in April 2015: Heavy rain, cool days, cool nights

South Australia recorded above average rainfall during April. Rainfall totals for the month were above average across eastern, central and western agricultural districts, particularly across southern parts of the central and northeast pastoral districts. Rainfall totals were average tending below average in the southeast agricultural and across some northwest pastoral areas.

The heaviest rainfall occurred between the 16th and 18th when a upper level trough moved over central and eastern parts of the State. The resulting rainband produced locally heavy falls of greater than 60 mm, with some stations in the Flinders districts having their highest April daily rainfall on record on the 17th, while broad areas of the northern agricultural and the southern pastoral districts received more than 80% of the monthly total rainfall in just one day. Some stations recorded two to three times their long-term April average, resulting in their highest total April rainfall on record.

Daytime temperatures were below average during April, particularly across the southern half of the State, resulting in the statewide average to be the coolest April days in 32 years (since 1983). Daytime temperatures were particularly cold in the second half of the month associated with the passage of a cold fronts and high pressure systems located deep in the Great Australian Bight which directed persistent southerly to south-westerly airstreams across the State.

Night-time minimum temperatures for April were also cooler than average, particularly across central and southeast parts of the State. Statewide, minimum temperatures were the coolest in 16 years (since 1999). The lower southeast of the State saw minimum temperatures 1 to 2 °C below average, but elsewhere across the State, minimum temperatures were within 1 °C of the long-term April average.

  • Record April daily rainfall totals in the Flinders Ranges
  • Coolest April maximum temperatures in 32 years (since 1983) for South Australia
  • Coolest April minimum temperatures in 16 years (since 1999) for South Australia

Further information

Media
(03) 9669 4057
Enquiries

Extremes in April 2015
Hottest day 38.6 °C at Moomba Airport on the 15th
Warmest days on average 27.1 °C at Moomba Airport
27.1 °C at Oodnadatta Airport
Coolest days on average 14.6 °C at Mount Lofty
Coldest day 9.9 °C at Mount Lofty on the 25th
Coldest night -1.6 °C at Padthaway South on the 20th
Coolest nights on average 5.8 °C at Coonawarra
5.8 °C at Naracoorte Aerodrome
Warmest nights on average 14.1 °C at Neptune Island
Warmest night 23.7 °C at Marree Aero on the 15th
23.7 °C at Marree Aero on the 16th
Warmest on average overall 20.5 °C at Moomba Airport
Coolest on average overall 11.2 °C at Mount Lofty
Wettest overall 150.0 mm at Mount Compass
Wettest day 112.4 mm at Quorn on the 17th
Strongest wind gust 109 km/h at Neptune Island on the 24th

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 April daily rainfall
New record
(mm)
Old
record
Years of
record
Orroroo 92.0 on the 17th 46.0 on the 23rd in 1952 134
Orroroo (Black Rock) 100.4 on the 17th 75.0 on the 30th in 1974 132
Carrieton 48.0 on the 17th 39.6 on the 1st in 1931 131
Quorn 112.4 on the 17th 65.3 on the 2nd in 1889 126
Booleroo Centre (Willowie) 63.0 on the 17th 48.0 on the 12th in 1998 117
Bruce 91.8 on the 17th 63.8 on the 17th in 1971 117
Yunta (Panaramitee) 46.2 on the 17th 46.0 on the 20th in 1980 109
Oodla Wirra 73.3 on the 17th 40.6 on the 30th in 1995 90
Jamestown Pirsa 39.4 on the 17th 36.0 on the 14th in 2000 64
Berri 26.8 on the 17th 25.8 on the 27th in 2007 55
Braemar 72.4 on the 17th 35.5 on the 6th in 1974 51
Sturt Vale 100.0 on the 17th 28.2 on the 1st in 1935 51
Oodla Wirra (McCoys Well) 62.2 on the 17th 33.8 on the 9th in 2014 43
Clare High School 55.2 on the 7th 42.2 on the 9th in 2014 21
Renmark Aero 27.0 on the 17th 23.2 on the 27th in 2007 20



Record highest April total rainfall
New record
(mm)
Old
record
Years of
record
Average for
April
Bruce 111.8 102.6 in 1971 119 16.7
Sturt Vale 117.7 44.2 in 1935 51 11.8
Goolwa Barrage 92.1 82.4 in 1992 26 29.1
Clare High School 122.4 112.0 in 2014 21 40.8
North Shields (Port Lincoln AWS) 66.8 62.0 in 1998 21 21.0
Renmark Aero 48.8 44.2 in 2000 20 18.7

Highest April total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Years since
higher
Average for
April
Quorn 137.2 162.4 in 1889 126 21.0
Wilmington 112.4 168.8 in 1889 126 29.8
Orroroo 94.8 100.1 in 1891 124 22.0
Langhorne Creek 89.0 93.0 in 1948 67 32.3
Melrose 107.6 121.4 in 1952 63 38.0
Balaklava 77.2 105.8 in 1961* 52 33.0
Cleve 92.6 99.2 in 1963 52 29.1
Cowell 61.6 98.0 in 1963 52 25.3
Hawker (Wilson) 88.4 118.5 in 1968 47 20.0
Mount Compass 150.0 183.6 in 1971 44 63.1
Berri 47.8 113.4 in 1974 41 19.7
Jamestown Pirsa 78.3 128.4 in 1974 41 29.2
Oodla Wirra 96.5 122.4 in 1974 41 20.0
Oodla Wirra (McCoys Well) 90.0 116.8 in 1974 41 16.3
Orroroo (Black Rock) 121.4 184.0 in 1974 41 21.2
Port Germein 81.6 87.8 in 1974 41 25.9
Yunta (Panaramitee) 84.4 115.0 in 1974 41 14.5
Braemar 108.4 148.5 in 1974* 40 17.4
Jamestown 85.4 129.1 in 1974* 40 30.7
Whyte Yarcowie 85.6 123.8 in 1974* 40 23.0
Lyrup 54.4 112.6 in 1974* 39 15.5
Brinkworth (Bungaree) 133.0 149.9 in 1980 35 43.4
Hawker 82.0 106.6 in 1980 35 20.3
Palmer 83.4 94.8 in 1980 35 29.3
Spalding 89.6 90.2 in 1980 35 27.4
Tumby Bay 94.8 98.2 in 1980 35 23.7
Mannum Council Depot 64.4 98.2 in 1980* 33 25.2
Arno Bay 84.4 85.4 in 1983 32 24.8
Ceduna AMO 46.4 99.2 in 1983 32 19.9
Cleve Aerodrome 80.2 85.4 in 1983 32 26.1
Milang 84.4 103.4 in 1983 32 33.4
Cummins 80.4 105.0 in 1983* 31 26.2
Port Parham 65.3 76.8 in 1983* 30 26.9
Stockport (Clifton) 74.0 84.6 in 1983* 30 34.4
Finniss 108.6 117.1 in 1971* 29 38.9
Goolwa Council Depot 86.0 86.8 in 1992 23 37.1
Victor Harbor (Rivington Grange) 109.2 141.2 in 1992 23 52.4
Wharminda 75.4 83.7 in 1992 23 21.8
Inman Valley 102.0 156.6 in 1992* 22 60.3

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




Record lowest April daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Coulta (Coles Point) 15.4 on the 24th 15.5 on the 26th in 2008 24 22.2



Record lowest April mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Kimba 20.6 21.2 in 1983 47 24.0
Nullarbor 22.1 22.4 in 2006 28 24.8
Clare High School 18.6 18.8 in 1995 21 21.6

Lowest April mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Years since
lower
Average for
April
Ceduna AMO 21.3 21.0 in 1952 63 24.3
Streaky Bay 21.7 21.4 in 1952* 62 23.7
Cleve 19.3 19.1 in 1952* 61 22.7
Elliston 20.3 19.8 in 1977 38 22.4
Andamooka 24.6 24.4 in 1983 32 27.3
Warooka 19.8 19.4 in 1983 32 22.0
Woomera Aerodrome 22.9 22.8 in 1983 32 25.6
Yongala 19.5 18.1 in 1983 32 22.0
Kyancutta 22.6 22.0 in 1983* 31 25.4
Whyalla Aero 21.2 19.7 in 1946* 27 23.9
Hawker 22.8 22.0 in 1983* 25 25.4
Maitland 19.9 =19.9 in 1965* 25 22.5
Leigh Creek Airport 23.8 23.2 in 1995 20 26.2

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




Record lowest April temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Marla Police Station 1.5 on the 30th = 1.5 on the 23rd in 1999 29 13.6



Lowest April mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Years since
lower
Average for
April
Maitland 11.2 10.5 in 1965* 25 12.6
Neptune Island 14.1 13.8 in 1995 20 15.0

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




Record lowest April mean temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Kimba 15.1 15.6 in 1995 47 17.6

Lowest April mean temperature for at least 20 years
Observed
(°C)
Most recent
lower
Years since
lower
Average for
April
Cleve 15.4 =15.4 in 1965* 49 17.5
Maitland 15.5 15.2 in 1965* 25 17.6
Neptune Island 16.2 16.1 in 1995 20 17.3
Warooka 15.7 =15.7 in 1995 20 17.3

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




Summary statistics for April 2015
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
April
2015
Diff
from
average
Highest for
April
2015
Mean for
April
2015
Diff
from
average
Lowest for
April
2015
Total for
April
2015
Average
for
April
Rank of
April
2015
Fraction of
April
average
Northwest (district 16)
Andamooka 24.6 -2.7 35.7 14th 13.7 -0.3 8.6 29th 6.0 15.7 average 38%
Coober Pedy Airport 24.6 -2.5 35.7 14th 12.9 -1.4 6.7 30th 2.4 13.5 average 18%
Ernabella (Pukatja) 24.5 -2.7 35.5 14th 12.0 -1.4 4.0 30th 5.4 16.9 average 32%
Mount Ive 22.4   32.7 14th 10.7   2.5 30th 21.9 15.4 high 142%
Roxby Downs (Olympic Dam Aerodrome) 24.3 -2.9 36.0 14th 12.6 0.0 5.5 29th 21.8 17.5 high 125%
Tarcoola Aero 24.2 -2.9 34.6 14th 11.5 -0.8 3.6 30th 6.8 11.8 average 58%
Woomera Aerodrome 22.9 -2.7 35.4 14th 12.6 -0.5 6.6 29th 23.8 12.2 high 195%
Far North (district 17)
Arkaroola 23.6 -1.6 37.8 15th 10.7 -0.4 4.8 22nd 39.1 15.2 high 257%
Leigh Creek Airport 23.8 -2.4 35.0 14th 11.9 -1.1 4.6 29th 35.2 15.1 high 233%
Marree Aero 26.4 -2.5 38.5 15th 13.0 -1.2 5.8 30th 13.4 9.4 high 143%
Moomba Airport 27.1 -2.1 38.6 15th 14.0 -1.6 7.7 30th 12.0 7.7 high 156%
Oodnadatta Airport 27.1 -1.4 38.3 15th 12.9 -1.5 5.1 30th 0.4 11.3 average 4%
Western Agricultural (district 18)
Ceduna AMO 21.3 -3.0 31.2 12th 10.3 -0.4 2.4 30th 46.4 19.9 v high 233%
Cleve 19.3 -3.4 30.5 14th 11.5 -0.8 7.3 30th 92.6 29.1 v high 318%
Cleve Aerodrome 19.3 -4.1 31.1 14th 11.1 -1.3 7.2 30th 80.2 26.1 v high 307%
Coulta (Coles Point) 19.9 -2.3 27.9 13th 11.6 -0.2 6.3 30th 50.6 22.1 v high 229%
Cummins Aero 20.3   28.8 1st 10.6   4.7 28th 82.2
Elliston 20.3 -2.1 26.6 13th 12.5 +0.3 5.5 30th 39.8 27.5 high 145%
Kimba 20.6 -3.4 31.0 14th 10.2 -1.1 5.5 20th 35.0 22.8 high 154%
Kyancutta 22.6 -2.8 32.0 14th 9.2 -0.3 0.7 30th 41.0 19.8 v high 207%
Minnipa Pirsa 21.4 -3.6 30.5 1st 10.6 -1.5 5.2 8th 34.8 16.5 high 211%
Neptune Island 18.4 -1.1 21.8 14th 14.1 -0.9 9.2 25th 40.0 31.2 high 128%
North Shields (Port Lincoln AWS) 19.9 -2.3 28.6 14th 12.3 +0.1 7.7 28th 66.8 21.0 highest 318%
Nullarbor 22.1 -2.7 31.8 13th 11.2 -0.5 4.9 29th 45.2 22.6 high 200%
Port Augusta Aero 23.0 -3.9 35.6 14th 11.8 -1.2 5.0 30th 35.6 18.9 high 188%
Streaky Bay 21.7 -2.0 28.0 12th 12.1 -0.7 5.3 30th 35.3 24.1 high 146%
Whyalla Aero 21.2 -2.7 33.6 14th 11.7 -0.1 4.6 29th 14.8 21.4 average 69%
Wudinna Aero 22.2 -3.1 31.6 14th 9.2 -1.0 2.4 30th 37.8 18.0 high 210%
Upper North (district 19)
Hawker 22.8 -2.6 33.8 14th 9.8 -1.2 3.0 29th 82.0 20.3 v high 404%
Yongala 19.5 -2.5 29.7 14th 7.3 +0.1 1.5 20th 61.0 25.3 v high 241%
Northeast (district 20)
Gluepot Reserve (Gluepot) 21.9 -3.0 32.8 1st 8.4 0.0 1.5 20th 78.4 22.9 v high 342%
Lower North (district 21)
Clare High School 18.6 -3.0 29.2 1st 8.3 -0.7 3.3 28th 122.4 40.8 highest 300%
Port Pirie Aerodrome AWS 22.7   33.2 14th 10.6   5.0 20th 36.4
Snowtown (Rayville Park) 21.7 -3.1 32.9 14th 8.0 -1.5 3.6 11th 35.4 26.6 high 133%
Yorke Peninsula (district 22A)
Edithburgh 19.2 -2.0 29.0 14th 12.9 -0.1 7.8 18th 44.8 25.1 high 178%
Kadina AWS 21.6   31.6 14th 8.6   1.7 20th 30.2 33.6 average 90%
Maitland 19.9 -2.6 29.8 14th 11.2 -1.4 6.9 20th 56.1 43.5 high 129%
Minlaton Aero 20.3 -3.0 27.5 14th 10.5 -1.4 6.0 28th 44.8 25.9 high 173%
Stenhouse Bay 19.0 -2.0 25.7 14th 13.4 -0.7 9.8 25th 35.4 28.2 average 126%
Warooka 19.8 -2.2 27.8 14th 11.6 -1.0 7.8 7th 58.8 32.9 high 179%
Kangaroo Island (district 22B)
Cape Borda 17.8 -2.1 21.7 12th 10.6 -2.0 6.8 20th 48.6 45.4 average 107%
Cape Willoughby 17.4 -1.7 25.7 1st 13.4 -0.8 8.8 7th 45.8 39.5 average 116%
Kingscote Aero 19.5 -2.1 27.3 14th 8.9 +0.2 4.0 20th 39.6 27.7 high 143%
Parndana Cfs AWS 17.7   25.9 14th 9.6   6.5 20th 49.2
Adelaide Plains (district 23A)
Adelaide (Kent Town) 20.5 -2.2 30.4 1st 11.1 -1.4 6.0 20th 57.4 40.3 high 142%
Adelaide Airport 20.1 -2.1 29.3 1st 11.0 -0.8 6.6 20th 50.0 35.3 high 142%
Edinburgh RAAF 20.6 -2.4 30.6 14th 10.3 -1.4 4.1 20th 54.6 31.5 high 173%
Parafield Airport 20.9 -1.8 32.2 1st 10.0 -1.8 3.3 20th 57.0 39.4 high 145%
Roseworthy AWS 20.9 -3.2 32.7 1st 8.8 -1.7 3.1 20th 44.0 31.1 high 141%
County Light (district 23B)
Nuriootpa Viticultural 18.8 -3.1 29.8 14th 8.4 -0.7 4.4 19th 56.4 36.0 average 157%
Rosedale (Turretfield Research Centre) 20.5 -2.6 32.0 1st 9.0 -1.7 2.5 20th 47.4 36.9 average 128%
Mount Lofty Ranges (district 23C)
Hindmarsh Island AWS 18.5 -3.3 29.2 14th 11.1 -1.2 5.8 20th 74.8 28.8 v high 260%
Kuitpo Forest Reserve 16.7 -3.0 29.0 1st 9.5 -1.7 4.9 20th 125.0 60.2 high 208%
Mount Barker 18.5 -2.0 29.6 1st 8.3 0.0 3.0 20th 90.0 58.4 high 154%
Mount Crawford (Mt Crawford AWS) 16.5 -2.7 28.1 1st 8.6 -1.9 3.4 20th 66.4 45.1 high 147%
Mount Lofty 14.6 -1.0 25.0 1st 7.8 -1.9 2.5 20th 128.6
Noarlunga 19.6 -2.8 28.6 1st 11.7 -2.0 5.9 20th 55.8 33.9 high 165%
Parawa (Second Valley Forest AWS) 15.6 -2.5 25.0 1st 10.1 -1.0 6.4 25th 104.4 60.3 high 173%
Victor Harbor (Encounter Bay) 18.6 -2.9 31.3 1st 10.2 -0.1 5.4 4th 98.2 34.7 v high 283%
Upper Murray Valley (district 24A)
Loxton Research Centre 21.4 -2.5 32.3 1st 8.7 +0.2 4.1 20th 39.8 17.9 high 222%
Renmark Aero 21.9 -2.6 33.2 1st 9.1 +0.2 4.5 11th 48.8 18.7 highest 261%
Lower Murray Valley (district 24B)
Eudunda 19.0 -2.4 30.1 1st 9.3 -0.5 5.0 20th 70.0 33.6 high 208%
Meningie 19.3 -2.4 30.2 1st 9.4 -1.4 2.5 20th 63.0 37.7 high 167%
Murray Bridge (Pallamana Aerodrome) 19.9   31.6 1st 8.9   3.3 3rd 65.2 31.8 high 205%
Strathalbyn Racecourse 18.7 -3.6 30.7 1st 9.9 -0.5 4.7 20th 84.4 29.4 v high 287%
Murray Mallee (district 25A)
Karoonda 20.3 -3.4 30.4 1st 8.6 -1.0 4.3 20th 32.6 24.7 high 132%
Upper Southeast (district 25B)
Keith 20.3 -2.2 30.6 1st 7.9 -1.4 1.0 20th 40.3 32.8 average 123%
Keith (Munkora) 20.4 -3.0 31.0 14th 7.2 -0.9 -0.4 20th
Lameroo (Austin Plains) 20.4 -2.9 31.8 1st 8.1 -1.1 2.7 20th 44.8 27.7 high 162%
Lower Southeast (district 26)
Cape Jaffa (The Limestone) 18.4 -1.5 28.6 14th 9.8 -0.8 6.0 3rd 49.0 34.4 high 142%
Coonawarra 19.2 -1.9 29.7 1st 5.8 -2.0 -0.9 20th 24.0 36.2 average 66%
Mount Gambier Aero 17.9 -1.6 28.5 1st 7.7 -1.0 1.8 20th 59.2 54.9 average 108%
Naracoorte Aerodrome 19.7 -2.4 30.9 1st 5.8 -2.2 -1.4 20th 30.0 26.2 average 115%
Padthaway South 19.5 -2.6 30.1 14th 6.5 -1.7 -1.6 20th 27.0 25.9 average 104%
Robe Airfield 19.3 -1.2 30.4 14th 8.6 -0.9 1.7 3rd 48.4 41.8 average 116%

Notes

A Monthly Climate Summary is prepared to list the main features of the weather in South 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.

A Climate Summary is generally published on the first working day of each month.

This statement has been prepared based on information available at 10 am on Friday 1 May 2015. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

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.

The ACORN-SAT dataset is used for temperature area averages.

Further information

Media
(03) 9669 4057
Enquiries