Adelaide Metro & Hills in May 2011: Cold May Days!

  • May rainfall near average.
  • Maximum temperatures were up to 1.5°C below average.
  • Minimum temperatures were within 1°C of average.

Rainfall

May rainfall was mostly near average across the wider Adelaide area, with most of the month's rainfall received from the 9th to the 15th and the 20th to the 24th.

The May 2011 rainfall total at Adelaide (Kent Town) was 61.8mm on 14 days. This is just above the long-term average of 59.9mm on 12 days. Last year, 56.8 mm was recorded in May on 10 days.

The wettest rainfall recorded in the Adelaide and hills region for this month was at Crafers (Mt Lofty) with 131.0 mm.

The Adelaide (Kent Town) site has had its fourth wettest January to May period on record with 214 mm. The wettest first five months was in 1983 with 296 mm. Looking across the complete Adelaide rainfall record for Kent Town and West Terrace, the wettest first five months at West Terrace was in 1889 with 349 mm.

Note that the Adelaide official climate rainfall record is taken from the manually observed 203mm rain gauge at the Kent Town site. These figures may differ from totals on some Bureau web pages as these may be from automatic tipping bucket rain gauge readings.

Temperature

Average monthly maximum temperatures were mostly up to 1.5°C below average for May across the Adelaide metropolitan and hills area. The coldest days were experienced around the 23rd to 25th of the month in wet and cloudy conditions following the passage of a cold front.

The mean May maximum temperature recorded at Adelaide (Kent Town) for May 2011 was 18.0°C which is 1.0°C below the long-term mean maximum temperature. In comparison, May 2010 saw average maximum temperatures of 19.7°C at Adelaide (Kent Town).

The record lowest May mean maximum in Adelaide is 17.3°C set in 1979 at Kent Town.

The coldest day at Adelaide (Kent Town) was 14.4°C on the 25th, with the coldest maximum temperature recorded in the Adelaide & hills area being 8.2°C on the 25th at Mt Lofty.

Mean minimum temperatures were within 1.0°C of average this May.

The mean minimum temperature for May 2011 at Adelaide (Kent Town) was 10.0°C, which is 0.2C below the long-term mean minimum temperature.

The record lowest May mean minimum in Adelaide is 8.8°C set in 2006 at Kent Town. Last May the mean minimum was 10.5°C.

The coldest minimum temperature recorded in the Adelaide and hills area was 1.6°C on the 31st at Mt Barker, whilst the warmest night was 16.4°C at Noarlunga on the 20th.

Some sites had their lowest May mean daily maximum temperature for at least 25 years.

 

Further information

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Extremes in May 2011
Hottest day 25.6 °C at Parafield Airport on the 19th
Warmest days on average 18.4 °C at Parafield Airport
Coolest days on average 12.1 °C at Mount Lofty
Coldest day 8.2 °C at Mount Lofty on the 25th
Coldest night 1.6 °C at Mount Barker on the 31st
Coolest nights on average 7.2 °C at Mount Lofty
Warmest nights on average 10.7 °C at Noarlunga
Warmest night 16.4 °C at Noarlunga on the 20th
Warmest on average overall 14.2 °C at Noarlunga
Coolest on average overall 9.7 °C at Mount Lofty
Wettest overall131.0 mm at Crafers (Mt Lofty)
Highest wind gust 93 km/h at Adelaide Airport on the 22nd

Lowest May mean daily maximum temperature for at least 25 years
Mean daily maximum
temperature
for May 2011 (°C)
Most recent May
at least this cool
Years since
cooler
Average for
May
Mount Barker 15.1 15.0 in 1970 41 16.6



Summary statistics for May 2011
Maximum temperatures
for May
(°C)
Minimum temperatures
for May
(°C)
Rainfall
for May
(millimetres)
Mean for
May
2011
Diff
from
average
Highest for
May
2011
Mean for
May
2011
Diff
from
average
Lowest for
May
2011
Total for
May
2011
Average
for
May
Rank of
May
2011
Fraction of
May
average
Adelaide (Kent Town) 18.0 -1.0 24.9 19th 10.0 -0.2 5.2 16th 61.8 59.9 average 103%
Adelaide Airport 17.9 -0.6 24.7 21st 9.8 +0.3 4.0 16th 36.4 53.9 low 68%
Edinburgh RAAF 18.3 -0.9 25.4 19th 9.1 0.0 3.2 16th 52.8 43.7 average 121%
Mount Barker 15.1 -1.5 21.9 21st 7.4 +0.7 1.6 31st 68.8 87.6 average 79%
Mount Lofty 12.1   19.0 19th 7.2   4.1 9th 115.4
Noarlunga 17.7   24.9 21st 10.7   7.0 31st 45.4
Parafield Airport 18.4 -0.5 25.6 19th 8.5 -0.9 2.8 16th 46.0 47.5 average 97%

Notes

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 11 am on Wednesday 1 June 2011. 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.

Further information

Media
(03) 9669 4057
Enquiries