Tuesday, 2 October 2007 - Monthly Climate Summary for Adelaide Metro - Product code IDCKGC13R0

Adelaide Metro in September 2007
Rain Well Below Average, Maximum Temperature Nears Record High.

Summary

Adelaide recorded well below average rainfall for September. Maximum temperatures were 2°C to 3°C above average for the month, whilst the monthly mean minimum temperatures were about 1°C above average.

Rainfall

Adelaide's rainfall for September 2007 was 24.0 mm, recorded on 11 days. This is 38.9 mm below the average of 62.9 mm on 14 days. Last year, 32.6 mm was recorded in September on 7 days. This is the twenty-sixth driest September in the 169 years of rainfall records taken at the South Australian Regional Office and is the driest September for 20 years. The driest September on record occurred in 1951 when 7.0 mm was recorded.

The total rainfall for the first nine months of 2007 was 375.4 mm on 80 days. Last year 251.8 mm on 73 days was recorded over the same period. The average rainfall for the first nine months is 451.3 mm.

Temperature

The Adelaide Airport has recorded its highest September mean daily maximum temperature of 20.8°C.

The mean maximum temperature recorded at the South Australian Regional Office (Kent Town) for September 2007 was 20.8°C, which is 1.9°C above the average September mean maximum temperature of 18.9°C. This ranks as the fourth highest recorded at the South Australian Regional Office, 1944 is the highest with 21.5°C. The mean September maximum last year was 21.1°C. The hottest maximum temperature recorded in the Adelaide metropolitan area was 31.8°C on the 25th at Edinburgh, whilst the lowest was 14.2°C at Noarlunga on the 11th.

The mean minimum temperature for September 2007 at the South Australian Regional Office (Kent Town) was 10.8°C, which is 1.1°C above the normal September mean minimum of 9.7°C. This ranks as the equal fourth highest recorded at the South Australian Regional Office, 1973 is the highest with 11.1°C. Last September, the mean minimum was 9.8°C. The coldest minimum temperature recorded in the Adelaide metropolitan area was 0.2°C on the 5th at the Parafield Airport, whilst the warmest night was 18.6°C at South Australian Regional Office (Kent Town) on the 23rd.

Some sites had their highest September mean daily maximum temperature on record.

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
31.8°C at Edinburgh RAAF on the 25th
Warmest days on average
Highest mean daily maximum temperature
21.6°C at Parafield Airport
Coolest days on average
Lowest mean daily maximum temperature
19.9°C at Noarlunga
Coldest day
Lowest daily maximum temperature
14.2°C at Noarlunga on the 11th
Coldest night
Lowest temperature
0.2°C at Parafield Airport on the 5th
Coolest nights on average
Lowest mean daily minimum temperature
9.0°C at Edinburgh RAAF
Warmest nights on average
Highest mean daily minimum temperature
10.8°C at Adelaide (Kent Town)
Warmest night
Highest daily minimum temperature
18.6°C at Adelaide (Kent Town) on the 23rd
Wettest overall
Highest total rainfall
26.0 mm at Edinburgh RAAF
Highest wind gust
78 km/h at Adelaide Airport on the 16th
78 km/h at Adelaide Airport on the 19th

Records

Record highest September mean daily maximum temperature
Mean daily maximum
temperature
for September 2007 (°C)
Previous highest
for September
Years of
record
Normal for
September
Adelaide Airport 20.8 20.6 in 2006 53 18.0



Summaries

Summary statistics for September 2007
Maximum temperatures
for September
(°C)
Minimum temperatures
for September
(°C)
Rainfall
for September
(millimetres)
Mean for
September
2007
Diff
from
normal
Highest for
September
2007
Mean for
September
2007
Diff
from
normal
Lowest for
September
2007
Total for
September
2007
Normal
for
September
Rank of
September
2007
Fraction of
September
normal
Adelaide 20.8 +1.9 30.2 25th 10.8 +1.1 5.0 2nd 24.0 62.9 very low 37%
Adelaide Airport 20.8 +2.7 31.0 25th 10.0 +1.1 1.7 5th 20.8 46.5 low 45%
Edinburgh RAAF 21.3 +2.5 31.8 25th 9.0 +1.0 0.4 5th 26.0 48.1 low 54%
Noarlunga 19.9 30.5 25th 10.7 5.6 15th 25.6
Parafield Airport 21.6 +2.9 31.0 25th 9.2 +1.0 0.2 5th 23.8 44.0 low 54%

Notes

This statement has been prepared based on information available at 9 am on Tuesday 2 October 2007. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Normals 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 "normal" 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, normal in decile 4 to 7, high in decile 8 or 9 and very high is in decile 10).
The Fraction of normal shows how much rain has fallen this time as a percentage of the long-term mean.

Further information

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