Thursday, 31 May 2007 - Monthly Climate Summary for Adelaide Metro - Product code IDCKGC13R0

Adelaide Metro in May 2007
Rainfall Below Average, but Temperature Above Average

Summary

Rainfall in Adelaide during May was below average; temperatures were more than a degree above average.

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Rainfall

Adelaide's rainfall for May 2007 was 44.0 mm, which was recorded on 15 days. This compares with the normal total of 60.3 mm, recorded on 13 days. Last year 48.8 mm was recorded on 8 days. The total rainfall for the first five months of 2007 is 192.0 mm. Last year 159.4 mm was recorded over the same period, while normal rainfall for the first five months is 158.0 mm.

Autumn rainfall for 2007 totalled 151.8 mm, while the normal rainfall for autumn is 123.8 mm. Last year 121.4 mm was recorded for autumn.

Temperature

The mean maximum temperature for May 2007 was 20.1°C*, which is 1.1°C above the average May mean maximum of 19.0°C. Last year the mean May maximum was 17.4°C.

The mean minimum temperature for May 2007 was 12.1°C, which is 1.9°C above the average of 10.2°C for May. This was a record May mean minimum temperature for Adelaide, Kent Town. Last May the mean minimum was only 8.8°C.

Autumn 2007

Autumn rainfall for 2007 totalled 151.8 mm, while the normal rainfall for autumn is 123.8 mm. Last year 121.4 mm was recorded for autumn.

The mean maximum temperature for autumn 2007 was 24.0°C, which is 1.8°C above the average autumn mean maximum of 22.6°C. The mean maximum for autumn last year was 22.2°C. This has been the warmest autumn since 2005 when 24.4°C was achieved.

The mean minimum temperature for autumn 2007 was 14.2°C, which is 1.6°C above the average autumn mean minimum of 12.6°C. Last autumn the mean minimum was 12.5°C. This has been the warmest autumn mean minimum on record for Kent Town but only the warmest since 1974 for the Adelaide (West Terrace) site where 14.5°C was recorded. The warmest autumn mean minimum on record was in 1971 when 15.1°C was attained.

*calculated to 3pm 31 May 2007

Some sites had their highest May mean daily minimum 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		 26.3°C at Adelaide (Kent Town) on the 1st
Warmest days on average
Highest mean daily maximum temperature		 20.4°C at Parafield Airport
Coolest days on average
Lowest mean daily maximum temperature		 19.2°C at Noarlunga
Coldest day
Lowest daily maximum temperature		 14.6°C at Noarlunga on the 29th
Coldest night
Lowest temperature		 5.9°C at Parafield Airport on the 11th
5.9°C at Edinburgh RAAF on the 26th
5.9°C at Parafield Airport on the 26th
Coolest nights on average
Lowest mean daily minimum temperature		 10.8°C at Parafield Airport
Warmest nights on average
Highest mean daily minimum temperature		 13.1°C at Noarlunga
Warmest night
Highest daily minimum temperature		 17.4°C at Adelaide Airport on the 2nd
Wettest overall
Highest total rainfall		 57.4 mm at Edinburgh RAAF
Highest wind gust
 87 km/h at Noarlunga on the 29th

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Records

Record highest May mean daily minimum temperature
Mean daily minimum
temperature
for May 2007 (°C) 		Previous highest
for May		 Years of
record		 Normal for
May
Adelaide Airport 12.1 12.0 in 1958 53 9.5
Adelaide (Kent Town) 12.1 11.6 in 1988 31 10.1


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Summaries

Summary statistics for May 2007
Maximum temperatures
for May
(°C)		 Minimum temperatures
for May
(°C)		 Rainfall
for May
(millimetres)
Mean for
May
2007		 Diff
from
normal		 Highest for
May
2007		 Mean for
May
2007		 Diff
from
normal		 Lowest for
May
2007		 Total for
May
2007		 Normal
for
May		 Rank of
May
2007		 Fraction of
May
normal
Adelaide 20.3 +1.4 26.3 1st 12.1 +2.0 6.6 26th 44.0 59.8 low 74%
Adelaide Airport 19.9 +1.4 25.8 14th 12.1 +2.6 6.6 11th 34.4 54.3 low 63%
Edinburgh RAAF 19.9 +0.8 25.6 1st 10.9 +1.9 5.9 26th 57.4 43.0 high 133%
Noarlunga 19.2 24.4 1st 13.1 8.8 30th 49.6
Parafield Airport 20.4 +1.6 26.2 1st 10.8 +1.5 5.9 11th 48.8 47.4 normal 103%

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Notes

This statement has been prepared based on information available at 2 pm on Thursday 31 May 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