Adelaide Metro & Hills in January 2013: A hot and dry start to the year

This statement was prepared before all data for the period were available. This may affect some of the statistics presented.
  • A hot start to the month sees very high temperatures across the Adelaide region
  • Rainfall was below average across the Adelaide Plains and Hills

Rainfall

Much of the rainfall during January was recorded when a band of rain from a middle level cloud band streaming across the state from ex-Tropical Cyclone Narelle, extended across southern South Australia between the13th and 14th.

The rainfall total through January 2013 at Adelaide (Kent Town) was 11.6 mm received on 3 rain days. This is nearly 40% below the long term January average of 19.3 mm usually received on 4 to 5 rain days. The rainfall total this month is the driest January for Adelaide since 2010 when only 9.2 mm was observed. The long term median January rainfall for Adelaide (Kent Town) is 20.1mm, last time exceeded in January 2007 when 40.2 mm was observed. The driest January at Adelaide (Kent Town) was observed in 1992 when just 0.4 mm was recorded.

Most other locations in the Adelaide and Hills region received about 60% of their January average, with monthly rainfall totals typically ranging between 8 to 12mm on the Adelaide Plains, with higher totals in the 15 to 20mm range through the Adelaide Hills. The wettest location across the region was at Bridgewater where 21.2 mm was recorded for the month, 14.2 mm of which was observed on the 14th resulting in the wettest day for any location in the region.

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.

Temperature

The average maximum temperature recorded at Adelaide (Kent Town) for January 2013 was 30.4C, 1.1C warmer than the long term average January maximum temperature. By comparison, January 2012 saw average maximum temperatures of 31.1C. The record warmest January average maximum in Adelaide is 34.2C, observed at the West Terrace location in 1908.

High pressure systems, clear skies with above average sunshine hours dominated the weather throughout the month. The warmest period occurred during the first week of the month, Adelaide (Kent town) observed a maximum temperature of 45.0 C on the 4th which was the hottest day in 4 years and the fourth hottest day in Adelaide since records began in 1887. Edinburgh RAAF also observed the hottest day for any location in the region on the 4th with 45.2 C, while Adelaide Airport observed a highest January temperature on record since observations began in 1955 with a maximum of 44.1 C. Parafield Airport reported the warmest days on average, with a monthly average of 30.6 C, which is 1.0 C above the long term January average.

Mount Lofty observed the coldest day of the month for any location in the Adelaide and Hills region when the maximum reached just 15.5 C on the 31st. The coolest days on average were at Mount Lofty where the January maximum temperature averaged 25.1 C.

Mean minimum temperatures were generally below average across the Adelaide Plains and Hills throughout the month. The minimum temperature at Adelaide (Kent Town) averaged 16.7 C, 0.4 C below the long term January average. Reduced cloud cover can be attributed to the below average overnight temperatures throughout the month.

The coldest nights through January for most locations occurred at the end of the second week of the month, the coldest minimum temperature was 6.9C observed at Mount Lofty on the 14th. The coolest nights on average were recorded at Mount Lofty with 12.3 C. Mount Barker observed an average January minimum of 12.4C, 0.6C above the long term January average. The warmest night was observed at Mount Crawford with 25.8 C on the 4th.

Please Note: this information is provided on the last working day of the month; naturally, finalised figures cannot be provided until the first working day of the following month, when a more complete release will be issued. ADELAIDE WEATHER SUMMARY ISSUED 31/01/2013 CLIMATE SERVICES CENTRE, S.A. BUREAU OF METEOROLOGY For further information please contact Darren Ray on (08) 8366 2664.

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Extremes in January 2013
Hottest day 45.2 °C at Edinburgh RAAF on the 4th
Warmest days on average 30.6 °C at Parafield Airport
Coolest days on average 25.1 °C at Mount Lofty
Coldest day 15.5 °C at Mount Lofty on the 31st
Coldest night 6.9 °C at Mount Lofty on the 14th
Coolest nights on average 12.3 °C at Mount Lofty
Warmest nights on average 16.7 °C at Adelaide (Kent Town)
Warmest night 25.8 °C at Mount Crawford (Mt Crawford AWS) on the 4th
Warmest on average overall 23.5 °C at Adelaide (Kent Town)
Coolest on average overall 18.5 °C at Mount Lofty
Wettest overall 21.2 mm at Bridgewater
Driest overall 1 mm at Piccadilly (Woodhouse)
Wettest day 14.2 mm at Bridgewater on the 14th
Highest wind gust 69 km/h at Mount Crawford (Mt Crawford AWS) on the 11th



Record highest January temperature
Highest temperature
in January 2013 (°C)
Previous warmest
for January
Years of
record
Average for
January
Adelaide Airport 44.1 on the 4th 44.0 on the 28th in 2009 58 28.1



Summary statistics for January 2013
Maximum temperatures
for January
(°C)
Minimum temperatures
for January
(°C)
Rainfall
for January
(millimetres)
Mean for
January
2013
Diff
from
average
Highest for
January
2013
Mean for
January
2013
Diff
from
average
Lowest for
January
2013
Total for
January
2013
Average
for
January
Rank of
January
2013
Fraction of
January
average
Adelaide (Kent Town) 30.4 +1.1 45.0 4th 16.7 -0.4 12.3 14th 11.6 19.3 average 62%
Adelaide Airport 28.8 +0.7 44.1 4th 15.7 -0.3 11.2 15th 11.4 17.4 average 66%
Edinburgh RAAF 30.4 +0.5 45.2 4th 15.8 -0.6 10.6 15th 13.2 20.6 average 64%
Kuitpo Forest Reserve 26.3   41.0 4th 13.6   9.7 10th 12.2
Mount Barker 28.3 +1.1 42.7 4th 12.4 +0.6 7.4 30th 15.6 25.7 average 61%
Mount Crawford (Mt Crawford AWS) 27.9   41.8 4th 13.3   7.8 14th 12.0
Mount Lofty 25.1   38.5 4th 12.3   6.9 14th 17.4
Noarlunga 28.5   43.4 4th 16.2   11.1 29th 8.6
Parafield Airport 30.6 +1.0 44.7 4th 15.7 -0.6 11.1 15th 13.4 20.8 average 64%

 


Notes

This statement was prepared before all data for the period were available. This may affect some of the statistics presented.

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 3 pm on Thursday 31 January 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 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 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.

Further information

Media
(03) 9669 4057
Enquiries