Adelaide Metro & Hills in July 2010

Dry with cold nights.

  • Cooler than average minimums across the Metropolitan area.
  • Below average rainfall.

Rainfall

The total rainfall recorded in Adelaide (Kent Town) for July 2010 was 59.8 mm recorded on 11 days, which is below the long term average of 75.8 mm on 17 days. This has been the driest July since 2006 when 36.0 mm was recorded. The record lowest July rainfall was recorded in 1997 with 22.2 mm.

Rainfall totals elsewhere over the metropolitan and hills area were below the long-term July average. Rainfall totals were generally between 30 mm and 60 mm over the coastal and northern plains areas, increasing up to 100mm in the Mt Lofty Ranges.

125.6mm has been recorded in Adelaide (Kent Town) this winter so far, which is almost 100mm below the long-term winter average of 222.2mm.

This year so far 265.8 mm has been recorded in Adelaide (Kent Town). The long-term average is 316.7 mm for the same period.

 

Temperature

Maximum temperatures were slightly warmer than the long-term July average across the Adelaide metro and hills area.

The mean maximum temperature recorded at Adelaide (Kent Town) for July 2010 was 15.4 C, which is 0.1C above the long-term mean maximum temperature of 15.3C. Last year, the mean maximum temperature was 0.5 C above the long-term July mean maximum temperature.

The hottest maximum temperature recorded in the Adelaide metropolitan and hills area was 18.7 C, recorded at Parafield Airport on the 13th, and also at Adelaide (Kent Town) on the 28th.

Mean minimum temperatures were near 1.0C below average across the Adelaide metro and hills area for July.

The mean minimum temperature at Adelaide (Kent Town) for July was 6.8 C, which is 0.7C below the normal mean minimum temperature of 7.5 C. This is the coolest July average minimum temperature since 1998, when the mean was 6.7 C in Adelaide. The lowest recorded average minimum temperature of 4.8 C was recorded at the Adelaide, West Terrace site in 1899. Last year the July mean minimum temperature was 9.0 C.

The coldest minimum temperature recorded in the Adelaide metropolitan and hills area was -0.8 C on the 5th at Mount Barker, whilst the warmest night was 11.7 C recorded at Noarlunga on the 11th, at Adelaide (Kent Town) on the 13th and at Adelaide Airport on the 31st.

 

Severe Flash Flooding

18 July 2010

A fairly slow moving cluster of heavy convective showers tracked northeast across the Adelaide metro area in the early evening. Rain caused local flash flooding in southern suburbs. Marion recorded 33 mm in 1 hour from 5:50 pm to 6:50 pm.

 

Further information

Media
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Extremes in July 2010
Hottest day 18.7 °C at Parafield Airport on the 13th
18.7 °C at Adelaide (Kent Town) on the 28th
Warmest days on average 15.7 °C at Parafield Airport
Coolest days on average 9.6 °C at Mount Lofty
Coldest day 7.0 °C at Mount Lofty on the 1st
Coldest night -0.8 °C at Mount Barker on the 5th
Coolest nights on average 3.8 °C at Mount Barker
Warmest nights on average 7.8 °C at Noarlunga
Warmest night 11.7 °C at Noarlunga on the 11th
11.7 °C at Adelaide (Kent Town) on the 13th
11.7 °C at Adelaide Airport on the 31st
Wettest overall 340.4 mm at Melrose Park (Mitcham)
Highest wind gust 91 km/h at Mount Lofty on the 10th
91 km/h at Noarlunga on the 10th


Summary statistics for July 2010
Maximum temperatures
for July
(°C)
Minimum temperatures
for July
(°C)
Rainfall
for July
(millimetres)
Mean for
July
2010
Diff
from
average
Highest for
July
2010
Mean for
July
2010
Diff
from
average
Lowest for
July
2010
Total for
July
2010
Average
for
July
Rank of
July
2010
Fraction of
July
average
Adelaide (Kent Town) 15.4 +0.1 18.7 28th 6.8 -0.7 2.3 2nd 59.8 75.8 low 79%
Adelaide Airport 15.0 +0.1 18.1 28th 6.0 -1.0 2.0 2nd 45.2 59.4 average 76%
Edinburgh RAAF 15.3 +0.1 18.2 30th 5.1 -0.9 0.9 2nd 36.0 52.9 low 68%
Mount Barker 13.8 +1.0 17.0 28th 3.8 -0.7 -0.8 5th 88.3 105.9 average 83%
Mount Lofty 9.6   12.6 28th 5.0   2.9 25th 105.8
Noarlunga 14.9   17.4 28th 7.8   4.0 5th 60.8
Parafield Airport 15.7 +0.6 18.7 13th 4.8 -1.5 -0.3 6th 41.8 58.9 low 71%

Notes

A Monthly Climate Summary is prepared to list the main features of the weather in Adelaide Metro & Hills 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 August 2010. 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 20 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.

Further information

Media
(03) 9669 4057
Enquiries