Wednesday, 30 September 2009 - Monthly Climate Summary for Adelaide Metro & Hills - Product code IDCKGC13R0

Adelaide Metro & Hills in September 2009
A welcome near average month.

Summary

  • Heavier than normal rainfall during latter half of month raises water storage levels to near maximum.
  • Average temperatures within 1°C above the September average.

Based on preliminary data

This statement was prepared before all data for the period were available. This may affect some of the statistics presented. In particular, maximum temperatures for the final day were not available, as the “accounting period” had not finished. Final values, which have had greater opportunity for data quality control, will be presented in the Monthly Weather Review, which is usually published during the fourth week of the month.

An archive of previous monthly summaries for Adelaide Metro & Hills is also available, as are summaries for other states and many other climate summaries and diagnostics.

Rainfall

The South Australian Regional Office (Kent Town) rainfall for September 2009 was 61.6 mm, recorded on 19 days which is slightly above the Kent Town average of 60.2 mm on 14 days. (The South Australian Regional Office rainfall total is from the manually observed 203 mm rain gauge. This may differ from totals on the Bureau's webpage as these may be from the automatic tipping bucket rain gauge). September 2009 rainfall is the highest amount since September 2001 when 137.2 mm was recorded.

The total rainfall for the first 9 months of 2009 at the South Australian Regional Office was 438.4 mm, which is 7.2 mm below the long-term average of 445.6 mm. Last year 340.2 mm was recorded over the same period.

The rainfall amounts recorded in the metropolitan area were above average ranging from 45 mm, in coastal areas, to 85 mm in areas near the foothills. In the Adelaide Hills the rainfall totals were mainly between 90 mm and 130 mm. The highest reading was 161 mm at Heathfield.

Overall the water storage for Adelaide is at 90% of maximum capacity, very much more than this time last year.

Temperatures

The mean maximum temperature for September 2009 was in the range of 13.2°C, in the Adelaide Hills, to 19.7°C in the northern suburbs, which is within 1°C above the normal September mean maximum temperature.

The coldest daytime maximum temperature recorded at the South Australian Regional Office was 14.8°C on the 8th, 25th and 27th September.

The highest daily maximum temperature of 32.6°C was recorded at the Edinburgh, in the northern suburbs, on the 12th, whilst the coolest daytime temperature was 7.2°C at Mount Lofty, in the Adelaide Hills, on the 25th.

September's mean daily minimum temperatures in the suburbs and adjacent hills varied from 0.4°C above the average, in the northern suburbs, to 1.2°C above the average, in coastal regions and the Mount Lofty Ranges. The mean minimum temperature ranged from 6.6°C, in the hills, to 10.5°C in the southern suburbs.

The lowest daily minimum temperature recorded at the South Australian Regional Office was 4.8°C on the morning of the 10th.

In the metropolitan and hills areas the lowest daily minimum temperature of 0.5°C was recorded at Mount Barker on the morning of the 10th, whilst the warmest night was 17.4°C at Kent Town, the South Australian Regional Office, on the 30th.

Hail

Hail was observed in the suburbs and Adelaide Hills during the early hours of the morning on the 26th. The size of the hail in some areas was up to 15 mm in diameter. Further hail showers occurred later during the day on the 26th.

Further information

South Australian Regional Office
South Australian Climate Services Centre
Bureau of Meteorology
Phone (08) 8366 2600
Email climate.sa@bom.gov.au

Extremes

Hottest day
Highest temperature
32.6°C at Edinburgh RAAF on the 12th
Warmest days on average
Highest mean daily maximum temperature
19.7°C at Parafield Airport
Coolest days on average
Lowest mean daily maximum temperature
13.2°C at Mount Lofty
Coldest day
Lowest daily maximum temperature
7.2°C at Mount Lofty on the 25th
Coldest night
Lowest temperature
0.5°C at Mount Barker on the 10th
Coolest nights on average
Lowest mean daily minimum temperature
6.6°C at Mount Lofty
Warmest nights on average
Highest mean daily minimum temperature
10.5°C at Adelaide (Kent Town)
10.5°C at Noarlunga
Warmest night
Highest daily minimum temperature
17.4°C at Adelaide (Kent Town) on the 30th
Wettest overall
Highest total rainfall
161.0 mm at Heathfield Works Depot
Highest wind gust
89 km/h at Adelaide Airport on the 25th

Summaries

This table is very wide and may not fit if printed.

Summary statistics for September 2009
Maximum temperatures
for September
(°C)
Minimum temperatures
for September
(°C)
Rainfall
for September
(millimetres)
Mean for
September
2009
Diff
from
average
Highest for
September
2009
Mean for
September
2009
Diff
from
average
Lowest for
September
2009
Total for
September
2009
Average
for
September
Rank of
September
2009
Fraction of
September
average
Adelaide 19.3 +0.3 30.9 12th 10.5 +0.8 4.8 10th 61.6 60.2 average 102%
Adelaide Airport 19.1 +0.9 29.6 12th 10.1 +1.2 3.6 15th 50.4 46.0 average 110%
Edinburgh RAAF 19.5 +0.7 32.6 12th 8.4 +0.4 1.9 15th 55.2 47.6 high 116%
Mount Barker 17.5 +1.0 27.7 12th 7.0 +1.2 0.5 10th 100.0 85.2 average 117%
Mount Lofty 13.2   23.8 12th 6.6   2.5 26th 135.6
Noarlunga 18.3   28.2 16th 10.5   6.1 18th 53.4
Parafield Airport 19.7 +0.8 32.4 12th 8.9 +0.7 1.8 10th 61.0 43.9 high 139%

Notes

This statement has been prepared based on information available at 1 pm on Wednesday 30 September 2009. 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.

Based on preliminary data

This statement was prepared before all data for the period were available. This may affect some of the statistics presented. In particular, maximum temperatures for the final day were not available, as the “accounting period” had not finished. Final values, which have had greater opportunity for data quality control, will be presented in the Monthly Weather Review, which is usually published during the fourth week of the month.

Further information

South Australian Regional Office
South Australian Climate Services Centre
Bureau of Meteorology
Phone (08) 8366 2600
Email climate.sa@bom.gov.au