Thursday, 31 October 2013 - Monthly Climate Summary for Adelaide Metro & Hills - Product code IDCKGC23L0
Adelaide Metro & Hills in October 2013: Dry, warm and windy
- Warmer than average October days and near average night-time temperatures
- Rainfall below average across the Adelaide plains; more so throughout the Adelaide Hills
- Windier than usual for the month, with some frequent strong and gusty winds
The October 2013 rainfall total at Adelaide (Kent Town) was 32.4 mm received on 11 rain days. This is below the long-term average of 43.1 mm typically received on about 10 rain days but close to the long-term median rainfall for October at Adelaide (Kent Town) of 37.0 mm. By comparison, during October 2012, just 20.0 mm was recorded at Adelaide (Kent Town).
The wettest days of October for the Adelaide and Hills regions occurred during the first week of the month, and then around the middle of the month. On October 1, a cold front passed over the Adelaide region bringing showers and thunderstorms for the region with falls of up to 7 mm across the Adelaide Plains. Later in the month, a trough of low pressure followed by another cold front resulted in shower activity from the 13th through to the 17th.
Monthly rainfall totals across the region typically ranged from 15 to 30mm on the Adelaide plains with higher totals in the 40 to 60 mm range throughout the Hills. The wettest location for the month was at Mount Lofty where 63 .4 mm was observed. Mount Lofty also reported the wettest day through out the month with 15.8 mm in the 24 hours to 9am on the 17th.
(Note that the Adelaide official climate rainfall record is taken from the manually observed 203mm rain gauge at the Kent Town site in Adelaide. These figures may differ from totals on some Bureau of Meteorology web pages as these may be from automatic tipping bucket rain gauge readings).
Maximum temperatures were above average across the Adelaide region through October 2013 with the warmest period occurring between the 18th and 21st of the month due to a high pressure system over the Tasman Sea directing fresh northerly winds across South Australia, with the month finishing with a burst of cooler conditions.
Parafield Airport observed the warmest day for any location across the region with a maximum of 34.3. °C on the 20th. The warmest days on average were also at Parafield Airport with a monthly average of 23.3°C.
Despite the above temperatures, October started with cooler than normal days throughout the first week of the month; the coldest day of the month for any location in the Adelaide and Hills region was reported at Mount Lofty on the 1st when the maximum reached 9.7 °C; The coolest days on average for the month were at Mount Lofty with a October average maximum temperature of 16.1 °C.
Mean minimum temperatures were generally near average across the Adelaide Plains and Hills this October, with the minimum temperature at Adelaide (Kent Town) being 11.3 °C, -0.2 °C below the long term October average. Mount Lofty reported the coolest nights on average, with 7.3 °C for the month.
The coldest night during October 2013 in the Adelaide and Hills area was 2.2 °C observed at Mount Barker on the 25th. The warmest night was 20.8 °C at Noarlunga on the 20th. Noarlunga also recorded the warmest nights overall with a monthly average of 11.7 °C
While strong and gusty winds are common across the Adelaide region during spring months, October 2013 has been particularly windy. On the 1st and 2nd wind gusts in excess of 70 km/h were reported across the Adelaide region associated with a vigorous cold frontal system. The windy weather continued on the 16th and 17th with gusts up to 78 km/h observed at Adelaide Airport. Edinburgh RAAF reported the strongest wind gust for the month in the region with 89 km/h on the 22nd.
Adelaide (Kent Town) had 10 days with a wind gust over 50 km/h (compared to an average of about 7 days each October), while Adelaide Airport reported 16 days with winds greater than 50 km/h (compared to the October average of 11 days). Adelaide Airport recorded winds 23% stronger than usual for the month, with other locations recording winds between 10 to 20% stronger than usual.
|Extremes in October 2013|
|Hottest day||34.3 °C at Parafield Airport on the 20th|
|Warmest days on average||23.3 °C at Parafield Airport|
|Coolest days on average||16.1 °C at Mount Lofty|
|Coldest day||9.7 °C at Mount Lofty on the 1st|
|Coldest night||2.2 °C at Mount Barker on the 25th|
|Coolest nights on average||7.3 °C at Mount Lofty|
|Warmest nights on average||11.5 °C at Noarlunga|
|Warmest night||20.8 °C at Noarlunga on the 20th|
|Warmest on average overall||16.9 °C at Adelaide (Kent Town)|
|Coolest on average overall||11.7 °C at Mount Lofty|
|Wettest overall||63.4 mm at Mount Lofty|
|Driest overall||15.8 mm at Noarlunga|
|Wettest day||15.8 mm at Mount Lofty on the 17th|
|Highest wind gust||89 km/h at Edinburgh RAAF on the 22nd|
|Summary statistics for October 2013|
|Adelaide (Kent Town)||22.3||+0.4||33.0||20th||11.3||-0.2||5.4||15th||32.4||43.1||average||75%|
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 12 pm on Thursday 31 October 2013. 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
(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 being used for temperature area averages from December 2012 onwards. The major change from earlier datasets is that the ACORN-SAT dataset commences in 1910, rather than 1950, and hence rankings are calculated using a larger set of years.