ACT in June 2011: Below average rainfall for the ACT

  • Stations around the ACT recorded below average rainfall for June.
  • Maximum and minimum temperatures were about average for June.

Rainfall

Stations around the ACT recorded below average rainfall for June. Canberra Airport recorded just 8.8 mm of rain during June, well below the historical average of 40.4 mm. This is the second consecutive month of below average rainfall at Canberra Airport. The majority of rain fell on the 21st with the passage of a cold front, with 7.8 mm at the Airport and up to 15.2 mm at Tidbinbilla on the 22nd. Tidbinbilla Nature Reserve recorded 28.3mm well below its June average of 65.4mm, while Tuggeranong (Isabella Plains) recorded just 11mm, its lowest June total in its 5 years of operation.

Temperature

The average maximum temperature at Canberra Airport during June was 13.6 °C, 1.3 °C above the historical average of 12.3 °C. Similarly, Tuggeranong recorded an average maximum temperature of 13.3 °C. In comparison, minimum temperatures at Canberra Airport averaged 0.7 °C during June, which is close to the historical average of 1.0 °C. There were twelve nights below 0 °C during the month, typical for June, with coldest temperatures associated with a high pressure system in the last week of the month, reaching -5.0 °C on the 27th.

These above average maximum temperatures and slightly below average minimum temperatures were associated with generally clear conditions and above average sunshine, which were a result of high pressure systems dominating continental Australia over the June period.

Wind

During June the prevailing winds were northwesterly and comprised 43% of 3pm winds, slightly above average for this time of year. Maximum wind gusts at Canberra Airport reached 72km/h and were associated with the passage of a cold front on the morning of the 21st of June. The highest wind gust anywhere in the ACT was 78 km/hr at Mt Ginini on the 15th.

Other phenomena

Canberra Airport recorded an average of 5.7 hours of sunshine during June, slightly above the historical average of 5.2 sunshine hours. No thunderstorms were reported in the ACT.

Further information

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Extremes in June 2011
Hottest day 17.7 °C at Canberra Airport on the 2nd
Warmest days on average 13.6 °C at Canberra Airport
Coolest days on average 2.9 °C at Mount Ginini AWS
Coldest day -0.8 °C at Mount Ginini AWS on the 9th
Coldest night -5.9 °C at Mount Ginini AWS on the 7th
Coolest nights on average -1.7 °C at Mount Ginini AWS
Warmest nights on average 1.3 °C at Tuggeranong (Isabella Plains) AWS
Warmest night 8.1 °C at Tuggeranong (Isabella Plains) AWS on the 14th
Warmest on average overall 7.3 °C at Tuggeranong (Isabella Plains) AWS
Coolest on average overall 0.7 °C at Mount Ginini AWS
Wettest overall 28.3 mm at Tidbinbilla Nature Reserve
Wettest day 15.2 mm at Tidbinbilla Nature Reserve on the 22nd
Highest wind gust 78 km/h at Mount Ginini AWS on the 15th

Summary statistics for June 2011
Maximum temperatures
for June
(°C)
Minimum temperatures
for June
(°C)
Rainfall
for June
(millimetres)
Mean for
June
2011
Diff
from
average
Highest for
June
2011
Mean for
June
2011
Diff
from
average
Lowest for
June
2011
Total for
June
2011
Average
for
June
Rank of
June
2011
Fraction of
June
average
Canberra Airport 13.6 +1.3 17.7 2nd 0.7 -0.3 -5.0 27th 8.8 40.4 v. low 22%
Mount Ginini AWS 2.9   8.7 30th -1.7   -5.9 7th 24.8
Tuggeranong (Isabella Plains) AWS 13.4   17.0 2nd 1.3   -4.8 19th 11.0

Notes

As of March 2010, the official station for Canberra is 70351 'Canberra Airport'. Averages from the previous site, 70014 Canberra Airport Comparison, are used for comparisons.

A Monthly Climate Summary is prepared to list the main features of the weather in ACT Monthly Summary 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 10 am on Friday 1 July 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