South Australia in April 2016: Rainfall below average, persistent warmth

Most of South Australia recorded a warmer and drier than normal April. Daytime and night time temperatures were above average in the first half of the month, particularly across the pastoral areas. Rainfall was below average across most of the State, especially across northern and eastern districts.

  • Warmest April since 2013
  • Below average rainfall, especially in the east
  • Warmer days across the State
  • Warmer nights across northern districts

Following a wetter March, April was a dry month for most of South Australia, with little rainfall activity being reported across the State. The wettest period was on the 6th as a cold front crossed southern coastal regions, though highest totals were generally below 10 mm following the passage of the front. Rainfall totals for the month generally ranged from 10-25 mm across southern coasts, decreasing to less than 10 mm in northern parts of the agricultural areas. Almost the whole of the pastoral areas recorded little or no rainfall during the month.

South Australia had a warm April. Both the statewide mean maximum and mean minimum temperatures were above the historical average, with day time temperatures in the highest 10% of records across much of the northern and eastern districts. Overall, April 2016 was the warmest April since 2013.

During the first week of the month, warm days occurred across most districts. Maximum temperatures became milder following the passage of a cold frontal system and the establishment of a ridge of high pressure in the Great Australian Bight, during the second week of the month. Warm northwesterly winds during much of the second half of the month resulted in above average daytime temperatures persisting across large areas of the State, with especially warm periods between the 18th and 21st and from the 25th to the 30th.

Nights were warmer than average for northern districts, but generally mild, tending cooler than average across most other areas of South Australia during the first few days of April. The second half of the month saw nights become warmer than average across most areas of the State. The passage of a low pressure trough on the 27th resulted in much of the southern half of the State reporting minimum temperatures in excess of 6 °C above average.

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Extremes in April 2016
Hottest day 36.7 °C at Coober Pedy Airport on the 5th
Warmest days on average 32.2 °C at Moomba Airport
Coolest days on average 18.9 °C at Mount Lofty
Coldest day 13.6 °C at Mount Lofty on the 22nd
Coldest night 0.0 °C at Yunta Airstrip on the 24th
Coolest nights on average 8.6 °C at Gluepot Reserve (Gluepot)
8.6 °C at Padthaway South
Warmest nights on average 17.4 °C at Moomba Airport
Warmest night 22.5 °C at Noarlunga on the 27th
Warmest on average overall 24.8 °C at Moomba Airport
Coolest on average overall 14.8 °C at Mount Lofty
Wettest overall 44.0 mm at Mount Schank (Jethia)
Wettest day 22.6 mm at Mount Hope (Fairview) on the 29th
Strongest wind gust 93 km/h at Coulta (Coles Point) on the 30th

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





Summary statistics for April 2016
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
April
2016
Diff
from
average
Highest for
April
2016
Mean for
April
2016
Diff
from
average
Lowest for
April
2016
Total for
April
2016
Average
for
April
Rank of
April
2016
Fraction of
April
average
Northwest (district 16)
Andamooka 28.8 +1.5 34.9 5th 15.8 +1.8 11.4 25th 1.6 15.4 average 10%
Coober Pedy Airport 28.5 +1.5 36.7 5th 15.5 +1.3 10.6 24th 0 12.9 lowest 0%
Ernabella (Pukatja) 28.3 +1.2 35.7 5th 14.5 +1.2 6.3 25th 0 15.9 v low 0%
Mount Ive 26.2   33.9 5th 11.5   4.3 24th 10.5 15.3 average 69%
Roxby Downs (Olympic Dam Aerodrome) 28.7 +1.6 35.3 5th 14.1 +1.5 4.6 24th 0 16.6 v low 0%
Tarcoola Aero 27.1 +0.1 35.6 5th 12.3 0.0 6.0 25th 4.0 11.4 average 35%
Woomera Aerodrome 27.7 +2.2 35.5 5th 14.4 +1.3 7.3 24th 0.2 12.0 low 2%
Far North (district 17)
Arkaroola 27.5 +2.3 35.0 28th 12.5 +1.4 6.8 14th 7.0 15.1 average 46%
Leigh Creek Airport 29.0 +2.8 33.3 19th 14.5 +1.6 8.8 25th 2.4 14.7 average 16%
Marree Aero 30.7 +2.0 34.8 2nd 14.7 +0.5 7.1 24th 1.0 8.9 low 11%
Moomba Airport 32.2 +3.1 36.2 20th 17.4 +1.9 12.3 24th 0.2 7.3 low 3%
Oodnadatta Airport 30.5 +2.0 36.4 5th 15.7 +1.3 9.5 24th 0 11.2 lowest 0%
Western Agricultural (district 18)
Ceduna AMO 24.5 +0.3 34.4 1st 10.5 -0.2 1.9 24th 9.4 19.8 average 47%
Cleve 23.7 +1.0 30.8 1st 13.0 +0.7 9.0 8th 28.8 29.1 average 99%
Cleve Aerodrome 23.7 +0.5 31.1 1st 12.2 -0.1 7.8 25th 27.8 26.1 average 107%
Coulta (Coles Point) 22.6 +0.5 29.8 26th 10.9 -0.9 7.0 13th 27.0 22.3 average 121%
Cummins Aero 23.9   30.3 26th 9.5   4.5 24th 29.0
Elliston 22.1 -0.2 30.1 26th 11.0 -1.3 6.7 25th 39.0 27.6 high 141%
Kimba 24.7 +0.8 30.5 5th 11.4 +0.2 7.8 8th 10.6 22.7 average 47%
Kyancutta 26.7 +1.4 33.6 1st 9.3 -0.2 1.1 24th 14.3 19.8 average 72%
Minnipa Pirsa 25.0 +0.2 30.0 27th 12.3 +0.3 6.9 23rd 13.2 16.3 average 81%
Neptune Island 20.2 +0.7 22.8 30th 15.9 +0.9 13.8 18th 10.4 30.9 low 34%
North Shields (Port Lincoln AWS) 23.4 +1.3 30.7 1st 12.4 +0.2 6.5 25th 17.4 20.8 average 84%
Nullarbor 24.7 0.0 34.0 1st 11.8 +0.2 7.2 24th 14.0 22.5 average 62%
Port Augusta Aero 27.7 +1.1 35.3 5th 13.2 +0.3 4.5 24th 3.0 17.9 low 17%
Streaky Bay 24.3 +0.6 30.3 1st 12.7 -0.1 7.5 24th 12.8 24.0 average 53%
Whyalla Aero 25.2 +1.4 33.0 5th 12.5 +0.7 5.4 24th 9.8 21.1 average 46%
Wudinna Aero 26.3 +1.2 33.1 1st 10.0 -0.2 2.0 24th 12.4 17.6 average 70%
Upper North (district 19)
Hawker 27.3 +1.9 32.0 5th 11.8 +0.8 6.0 24th 2.8 20.1 low 14%
Yongala 23.5 +1.6 30.0 5th 9.2 +2.0 3.6 24th 6.0 25.2 low 24%
Northeast (district 20)
Gluepot Reserve (Gluepot) 26.3 +1.5 34.3 20th 8.6 +0.2 0.7 24th 4.2 21.8 low 19%
Yunta Airstrip 25.6 +1.2 32.6 5th 9.7 +0.6 0.0 24th 3.0 12.0 average 25%
Lower North (district 21)
Clare High School 23.4 +1.9 28.5 19th 9.5 +0.5 4.9 23rd 10.0 39.4 low 25%
Port Pirie Aerodrome AWS 26.8   33.0 5th 11.6   5.3 24th 7.6
Snowtown (Rayville Park) 25.7 +1.1 31.7 19th 9.7 +0.3 3.3 24th 9.8 25.7 low 38%
Yorke Peninsula (district 22A)
Edithburgh 22.5 +1.4 29.6 1st 13.2 +0.2 7.7 25th 15.4 24.7 average 62%
Kadina AWS 24.8 +1.0 30.4 1st 9.7 -0.7 3.6 24th 10.2 31.5 v low 32%
Maitland     29.0 19th 12.0 -0.6 7.2 23rd 17.8 43.3 low 41%
Minlaton Aero 24.0 +0.9 30.0 1st 11.8 0.0 6.4 8th 12.2 25.0 low 49%
Stenhouse Bay 21.8 +0.9 28.7 26th 14.2 +0.2 10.8 18th 20.4 27.8 average 73%
Warooka 22.8 +0.8 27.8 19th 13.4 +0.9 9.6 7th 16.2 32.8 average 49%
Kangaroo Island (district 22B)
Cape Borda 19.9 +0.2 24.7 19th 12.6 +0.2 8.3 4th 13.8 42.9 v low 32%
Cape Willoughby 20.3 +1.2 26.0 26th 15.0 +0.8 12.4 7th 16.4 39.4 low 42%
Kingscote Aero 22.8 +1.3 28.6 20th 9.3 +0.6 3.1 18th 23.0 27.5 average 84%
Parndana Cfs AWS 21.0   26.9 19th 10.7   5.5 7th 26.8
Adelaide Plains (district 23A)
Adelaide (Kent Town) 24.8 +2.2 30.1 26th 12.6 +0.2 7.8 18th 9.6 39.6 low 24%
Adelaide Airport 23.8 +1.6 28.8 26th 12.6 +0.8 6.8 18th 7.4 34.8 low 21%
Edinburgh RAAF 25.0 +2.0 30.8 20th 11.6 -0.1 5.7 18th 8.0 31.0 low 26%
Parafield Airport 25.1 +2.4 30.9 26th 11.1 -0.7 5.2 23rd 7.8 38.9 v low 20%
Roseworthy AWS 25.5 +1.6 31.4 20th 10.7 +0.3 2.9 23rd 8.8 29.9 low 29%
County Light (district 23B)
Nuriootpa Pirsa 23.4 +1.7 29.3 20th 9.4 +0.4 4.4 18th 12.8 34.8 low 37%
Rosedale (Turretfield Research Centre) 25.0 +2.0 31.0 20th 10.3 -0.4 3.8 23rd 9.8 36.6 low 27%
Mount Lofty Ranges (district 23C)
Hindmarsh Island AWS 23.2 +1.7 30.3 26th 12.7 +0.5 7.1 18th 9.2 27.4 low 34%
Kuitpo Forest Reserve 21.1 +1.6 27.3 20th 12.0 +0.9 8.5 7th 20.0 58.1 low 34%
Mount Barker 23.0 +2.6 28.5 26th 9.9 +1.6 3.8 18th 15.8 58.1 low 27%
Mount Crawford AWS 21.1 +2.1 26.8 19th 11.6 +1.2 6.1 23rd 13.0 43.6 low 30%
Mount Lofty 18.9 +3.3 24.4 26th 10.7 +1.0 5.7 17th 18.4
Noarlunga 23.3 +1.1 28.8 19th 13.9 +0.3 9.4 7th 9.8 32.4 low 30%
Parawa (Second Valley Forest AWS) 19.3 +1.3 25.8 26th 12.3 +1.2 8.4 7th 30.4 58.9 low 52%
Victor Harbor (Encounter Bay) 22.6 +1.3 29.4 26th 9.9 -0.4 4.4 18th 16.0 33.5 low 48%
Upper Murray Valley (district 24A)
Loxton Research Centre 25.5 +1.7 32.9 20th 9.5 +1.0 1.7 18th 3.0 17.4 low 17%
Renmark Aero 26.0 +1.6 34.6 20th 9.9 +1.0 1.8 18th 1.8 17.9 low 10%
Lower Murray Valley (district 24B)
Eudunda 23.2 +1.8 29.0 20th 10.6 +0.8 5.2 18th 10.4 33.4 low 31%
Meningie 23.2 +1.5 30.0 19th 11.3 +0.6 5.0 18th 8.2 37.5 v low 22%
Murray Bridge (Pallamana Aerodrome) 24.9 +2.0 31.0 20th 9.1 -0.1 1.6 18th 6.2 29.5 v low 21%
Strathalbyn Racecourse 23.9 +1.8 31.4 20th 11.2 +0.8 6.0 18th 8.6 28.4 low 30%
Murray Mallee (district 25A)
Karoonda 24.4 +0.9 31.5 20th 9.7 +0.2 3.9 18th 9.0 24.5 low 37%
Upper Southeast (district 25B)
Keith 23.9 +1.4 31.7 20th 10.5 +1.2 4.6 3rd 10.8 32.6 low 33%
Keith (Munkora) 24.1 +0.9 32.0 20th 9.1 +1.1 2.7 3rd 10.2 23.3 low 44%
Lameroo (Austin Plains) 24.3 +1.2 32.5 20th 9.6 +0.5 4.1 23rd 6.4 25.9 v low 25%
Lower Southeast (district 26)
Cape Jaffa (The Limestone) 20.8 +0.9 30.6 20th 11.8 +1.2 7.1 18th 22.8 33.9 low 67%
Coonawarra 22.3 +1.3 30.8 20th 8.7 +1.0 2.1 18th 20.8 35.9 average 58%
Mount Gambier Aero 21.3 +1.8 31.4 20th 9.9 +1.2 3.0 18th 31.4 54.6 low 58%
Naracoorte Aerodrome 23.0 +1.0 31.9 20th 9.3 +1.4 1.3 18th 19.6 25.8 average 76%
Padthaway South 23.0 +1.1 32.1 20th 8.6 +0.6 2.5 18th 14.0 25.1 v low 56%
Robe Airfield 21.4 +1.0 33.1 20th 9.8 +0.4 2.5 18th 26.6 40.6 low 66%

Notes

The Monthly climate summary lists 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.

A climate summary is generally published on the first working day of each month.

This statement has been prepared based on information available at 8 am on Monday 2 May 2016. 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