ACT Monthly Summary in June 2010:

Sunny days and cool nights for the ACT

  • Sunny, with below average rainfall for the ACT.
  • Warmer days, but cooler nights.

Rainfall

Canberra recorded a total of 24.8mm of rainfall in June 2010. This is below the historical average of 40.0mm. There were 4 days where the rainfall was greater than 1mm, which is below the average of 5.7 days. Most of the June rainfall was recorded on three days, the 17th, 18th and 26th, each of these as a result of the passage of winter cold fronts. The highest daily rainfall recorded at Canberra was 9.0mm on the 26th. The highest rainfall recorded within the ACT was 28.2mm at Mt Ginini AWS, on the same day.

Temperature

Canberra recorded an average maximum temperature of 13.0 °C in June, which is 0.8 °C warmer than the historical average. The warmest day was 16.1 °C on the 2nd of the month, with the coolest maximum being 7.7 °C on the 9th. The warmest day recorded in the ACT was at Tuggeranong on the 4th, where they reached 16.8 °C.

Overnight temperatures in Canberra were a little cooler than usual with the average minimum temperature being 0.6 °C (historical average, 1.0 °C). The coldest night recorded at Canberra was -5.0 °C on the 28th. There were 13 days which dropped below freezing, which is equal to the historical average. There were two cold snaps during the month, with 6 consecutive nights dropping below zero between the 11th and the 16th, and another 4 consecutive nights between the 27th and the 30th. These cold conditions were associated with dominant high pressure systems over the area, which brought clear skies and light winds. The coolest June temperatures recorded within the ACT were -7.0 °C at Mt Ginini on the 30th, followed by -6.8 °C at Tuggeranong on the 29th.

The mean temperature at Canberra (average of maximum and minimum temperature), was 6.8 °C, which is slightly above the historical average of 6.6 °C.

Wind

Canberra predominantly experienced north to northwesterly winds, with 67% of afternoon observations from these directions (compared to a historical frequency of 44%). The highest winds during the month were recorded on the 17th, associated with the passage of a cold front, with maximum wind gusts up to 72 km/hr recorded at Canberra, and 93 km/hr at Mt Ginini (elev 1760 m).

Other phenomena

Canberra averaged 6.3 hours of sunshine during June, which is above the average of 5.2 hours. There were no reports of Thunderstorms at Canberra Airport. Frost was observed on 12 mornings (average is 18), with fogs recorded on 8 mornings (average is 8).

Further information

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Extremes in June 2010
Hottest day 16.8 °C at Tuggeranong (Isabella Plains) AWS on the 4th
Warmest days on average 13.3 °C at Tuggeranong (Isabella Plains) AWS
Coolest days on average 3.6 °C at Mount Ginini AWS
12.5 °C at Tidbinbilla Nature Reserve
Coldest day -2.7 °C at Mount Ginini AWS on the 9th
Coldest night -7.0 °C at Mount Ginini AWS on the 30th
-6.7 °C at Tuggeranong (Isabella Plains) AWS on the 29th
Coolest nights on average -1.8 °C at Mount Ginini AWS
0.6 °C at Canberra Airport
Warmest nights on average 1.6 °C at Tidbinbilla Nature Reserve
Warmest night 10.1 °C at Tuggeranong (Isabella Plains) AWS on the 4th
Wettest overall 73.4 mm at Mount Ginini AWS
56.4 mm at Tidbinbilla Nature Reserve
Wettest day 28.2 mm at Mount Ginini AWS on the 26th
22.4 mm at Tuggeranong (Isabella Plains) AWS on the 26th
Highest wind gust 93 km/h at Mount Ginini AWS on the 17th
72 km/h at Canberra Airport on the 17th




Summary statistics for June 2010
Maximum temperatures
for June
(°C)
Minimum temperatures
for June
(°C)
Rainfall
for June
(millimetres)
Mean for
June
2010
Diff
from
average
Highest for
June
2010
Mean for
June
2010
Diff
from
average
Lowest for
June
2010
Total for
June
2010
Average
for
June
Rank of
June
2010
Fraction of
June
average
Canberra Airport 13.0 +0.8 16.1 2nd 0.6 -0.4 -5.0 28th 24.8 40.0 low 62%
Mount Ginini AWS 3.6   7.2 5th -1.8   -7.0 30th 73.4
Tidbinbilla Nature Reserve 12.5 +0.8 15.5 4th 1.6 +0.3 -5.5 29th 56.4 66.0 average 85%
Tuggeranong (Isabella Plains) AWS 13.3   16.8 4th 0.6   -6.7 29th 36.0

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.

This statement has been prepared based on information available at 10 am on Thursday 1 July 2010. 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