Monday, 3 August 2015 - Monthly Climate Summary for South Australia - Product code IDCKGC13R0
South Australia in July 2015: cool and dry across much of the State
In South Australia, most central and eastern districts saw below average rainfall for July. Rainfall was also below average in the northeast Pastorals, but western and northern parts of State saw falls closer to average for the month. Statewide temperatures were cooler than average as a whole, with cooler than normal days and nights particularly in central and eastern parts.
- Dry across the central and eastern districts
- Coolest July days since 2010
- Cooler nights across most areas
- Warmer July nights in the Northwest
- Snowfall on the Mount Lofty and Flinders Ranges
July rainfall was below average for South Australia as a whole, with particularly dry areas through central and eastern parts of the State. The wettest period for most southern locations occurred between the 11th and 15th as a cold frontal system crossed the state, bringing totals of 25 to 50 mm to southern coasts and elevated regions across the Mount Lofty and Flinders Ranges. The passage of the cold front produced snowfall down to levels of about 500 metres on the morning of 11th. Showers persisted across southern districts to around the 16th as a result of a southerly airstream being directed across the coasts. A sequence of cold fronts swept across southern coastal areas from the 21st to 26th, bringing light to moderate periods of rain for agricultural areas.
The statewide mean maximum temperature was cooler than normal, coming in as the coolest July since 2010. The coolest temperatures for the month were recorded between the 11th and the 17th as a high pressure system located in the Great Australian Bight directed a southerly airstream across the state. Daytime time temperatures were up to 6 degrees below the July average for large areas of the state during this period. Minimum temperatures were also below average for July, with coldest nights being recorded between the 18th and 21st, as a high pressure system positioned over eastern parts of the State maintained calm conditions. Light winds and clear skies during this period resulted in minimum temperatures of around 5 to 10 degrees below average and morning frost reported across much of the state, with Strathalbyn, Parawa and Edithburgh having their lowest July temperature on record.
Despite the generally cool conditions across much of the state, only Coonawarra and Hawker had their lowest July mean daily maximum temperature for at least 20 years.
|Extremes in July 2015|
|Hottest day||28.6 °C at Coober Pedy Airport on the 31st|
|Warmest days on average||19.0 °C at Oodnadatta Airport|
|Coolest days on average||8.5 °C at Mount Lofty|
|Coldest day||5.3 °C at Mount Lofty on the 11th|
|Coldest night||-5.7 °C at Gluepot Reserve (Gluepot) on the 20th|
|Coolest nights on average||2.0 °C at Yongala|
|Warmest nights on average||11.0 °C at Neptune Island|
|Warmest night||13.9 °C at Neptune Island on the 5th|
|Warmest on average overall||12.8 °C at Neptune Island|
|Coolest on average overall||6.2 °C at Mount Lofty|
|Wettest overall||161.0 mm at Crafers West|
|Wettest day||40.0 mm at Piccadilly (Woodhouse) on the 11th|
|Strongest wind gust||106 km/h at Neptune Island on the 11th|
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|Lowest July mean daily maximum temperature for at least 20 years|
* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported.
|Record lowest July temperature|
|Edithburgh||0.0||on the 20th||0.4||on the 24th in 2008||25||7.5|
|Parawa (Second Valley Forest AWS)||1.2||on the 20th||2.2||on the 12th in 1998||22||6.9|
|Strathalbyn Racecourse||-1.6||on the 20th||-0.7||on the 20th in 2006||20||6.6|
|Summary statistics for July 2015|
|Northwest (district 16)|
|Coober Pedy Airport||17.5||-1.0||28.6||31st||5.7||-0.7||0.9||19th||2.2||4.9||average||45%|
|Roxby Downs (Olympic Dam Aerodrome)||17.6||-0.9||25.6||31st||3.0||-1.3||-2.2||18th||0.6||7.2||low||8%|
|Far North (district 17)|
|Leigh Creek Airport||16.0||-0.7||23.3||31st||4.2||-0.5||-0.3||18th||5.2||16.4||average||32%|
|Western Agricultural (district 18)|
|Coulta (Coles Point)||14.9||-0.6||17.3||2nd||6.3||-1.2||1.0||20th||32.2||50.6||low||64%|
|North Shields (Port Lincoln AWS)||15.4||-0.7||18.5||30th||6.2||-1.3||2.9||20th||34.6||56.2||low||62%|
|Port Augusta Aero||16.5||-1.3||22.0||31st||4.1||-0.6||-1.3||20th||13.8||18.2||average||76%|
|Upper North (district 19)|
|Northeast (district 20)|
|Gluepot Reserve (Gluepot)||16.0||-1.0||21.0||10th||3.2||-0.4||-5.7||20th|
|Lower North (district 21)|
|Clare High School||11.8||-1.0||15.6||9th||3.2||-0.9||-3.4||20th||55.4||66.8||average||83%|
|Port Pirie Aerodrome AWS||15.5||18.8||10th||5.4||-0.6||1st||56.8|
|Snowtown (Rayville Park)||14.6||-0.7||17.8||31st||3.8||-0.9||-1.8||1st||37.8||41.5||average||91%|
|Yorke Peninsula (district 22A)|
|Kangaroo Island (district 22B)|
|Parndana Cfs AWS||13.0||16.1||30th||5.9||1.1||31st||90.6|
|Adelaide Plains (district 23A)|
|Adelaide (Kent Town)||14.7||-0.6||19.1||9th||6.7||-0.8||1.8||20th||73.6||76.5||average||96%|
|County Light (district 23B)|
|Rosedale (Turretfield Research Centre)||14.4||-0.3||18.7||9th||4.2||-1.4||-2.1||20th||58.0||59.3||average||98%|
|Mount Lofty Ranges (district 23C)|
|Hindmarsh Island AWS||14.5||-0.7||18.7||9th||7.4||-0.6||1.3||20th||55.2||48.5||average||114%|
|Kuitpo Forest Reserve||11.4||-0.9||15.9||23rd||5.6||-1.1||0.6||20th||118.4||107.5||average||110%|
|Mount Crawford (Mt Crawford AWS)||10.2||-0.7||13.9||9th||4.9||-1.0||1.2||20th||76.4||95.9||average||80%|
|Parawa (Second Valley Forest AWS)||11.1||-0.5||14.1||23rd||6.2||-0.7||1.2||20th||109.0||125.7||average||87%|
|Victor Harbor (Encounter Bay)||14.8||-0.7||18.4||9th||6.0||-0.7||-2.5||20th||75.6||77.4||average||98%|
|Upper Murray Valley (district 24A)|
|Loxton Research Centre||15.6||-0.2||20.1||10th||3.7||-0.2||-3.9||20th||19.6||27.5||low||71%|
|Lower Murray Valley (district 24B)|
|Murray Bridge (Pallamana Aerodrome)||14.8||18.0||5th||3.1||-4.6||20th||41.0||35.5||average||115%|
|Murray Mallee (district 25A)|
|Upper Southeast (district 25B)|
|Lameroo (Austin Plains)||14.1||-0.5||18.4||5th||3.6||-0.7||-2.3||20th||39.0||31.7||average||123%|
|Lower Southeast (district 26)|
|Cape Jaffa (The Limestone)||13.3||-0.7||15.1||30th||7.2||-0.4||0.8||20th||64.8||79.8||average||81%|
|Mount Gambier Aero||12.6||-0.6||15.9||9th||5.1||-0.1||-0.2||20th||87.4||99.4||average||88%|
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 9 am on Monday 3 August 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
(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.