Canberra in June 2012: Coldest June night in over a decade

  • First wet June since 2007
  • Cold nights and mild days
  • Coldest June night since 2000

Rainfall - First wet June since 2007

Canberra Airport recorded 47.8 mm of rainfall during June, slightly above the historical average of 40.4 mm. This is the first June with above average rainfall in Canberra since 2007. The rain fell over 11 days, of which 5 exceeded 1 mm, normal for June.

Most of the rain fell in the first week of the month, with a surface trough bringing widespread rainfall on the 3rd, reaching 17.6 mm at Canberra Airport and 26.5 mm at Tidbinbilla. Conditions cleared on the 4th, before a low pressure system developed off the south coast and moved northward, bringing further rain on the 5th and 6th. The rest of the month was generally clear, with 7 mm on the 22nd as a cold front crossed the state.

Temperature - Cold nights and mild days

The average maximum temperature at Canberra Airport during June was 12.9 °C, 0.6 °C above the historical average. Only three days were below 10 °C, below the June average of 5 days, but only two exceeded 15 °C, the fewest warm days since 2007.

The average minimum temperature during June was 0.6 °C, below the historical average of 1.0 °C. Thirteen nights reached 0 °C with seven below -2 °C, normal for June. The lowest temperature was -6.3 °C on the 20th, the coldest night since -7.1 °C on June 15 2000. Canberra also experienced three consecutive nights below -4 °C between the 8th and 10th, the longest cold spell for June since 2006 and the earliest spell this cold since 16-18 May 1999.

The mean temperature for Canberra was consequently 6.7 °C, 0.1 °C above average for June but the coolest since 2006.

Other phenomena

The prevailing wind direction at Canberra Airport was northwesterly, with 50% of 3pm winds between NNW and WNW, while 9am winds were generally calm, normal for June. There were six strong wind days during the month, the most since 2004, with a maximum wind gust of 59 km/hr on the 5th, reaching 74 km/hr at Tidbinbilla.

Canberra Airport recorded an average of 4.6 hours of sunshine during June, below the historical average of 5.2 hours. Six fogs were reported at the airport, slightly below the June average of 7-8 fogs.

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Extremes in June 2012
Hottest day 16.3 °C at Canberra Airport on the 15th
Warmest days on average 12.9 °C at Canberra Airport
Coolest days on average 3.2 °C at Mount Ginini AWS
Coldest day -1.0 °C at Mount Ginini AWS on the 30th
Coldest night -6.3 °C at Canberra Airport on the 20th
Coolest nights on average -1.2 °C at Mount Ginini AWS
Warmest nights on average 1.5 °C at Tidbinbilla Nature Reserve
Warmest night 7.7 °C at Canberra Airport on the 3rd
Warmest on average overall 6.8 °C at Canberra Airport
6.8 °C at Tidbinbilla Nature Reserve
Coolest on average overall 1.1 °C at Mount Ginini AWS
Wettest overall 58.0 mm at Mount Ginini AWS
Wettest day 26.5 mm at Tidbinbilla Nature Reserve on the 3rd
Highest wind gust 76 km/h at Mount Ginini AWS on the 21st


Summary statistics for June 2012
Maximum temperatures
for June
(°C)
Minimum temperatures
for June
(°C)
Rainfall
for June
(millimetres)
Mean for
June
2012
Diff
from
average
Highest for
June
2012
Mean for
June
2012
Diff
from
average
Lowest for
June
2012
Total for
June
2012
Average
for
June
Rank of
June
2012
Fraction of
June
average
Canberra Airport 12.9 +0.6 16.3 15th 0.6 -0.4 -6.3 20th 47.8 40.4 average 118%
Mount Ginini AWS 3.2   7.8 1st -1.2   -4.3 24th 58.0
Tidbinbilla Nature Reserve 12.3 +0.5 15.0 15th 1.5 +0.1 -5.0 20th 51.4 65.1 average 79%
Tuggeranong (Isabella Plains) AWS 12.7   16.2 15th 0.6   -5.9 20th 42.6

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 9 am on Monday 2 July 2012. 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