Monday, 2 December 2013 - Monthly Climate Summary for Canberra - Product code IDCKGC15R0
Canberra in November 2013: Heavy rain, cool nights
- Well above average rainfall; most heavy rain events on record for November
- Coldest November minimum temperatures since 1999
- Severe thunderstorm hits Canberra
Rainfall - Heavy rain in Canberra
Canberra airport recorded 105.6 mm of rain during November, well above the historical average of 64.4 mm. The rain fell over eleven days, close to the November average of 10 rain days, most of which recorded less than 2 mm. However, three days recorded at least 25 mm of rain, the most heavy rain days on record for November.
There were two main rain events during the month. Canberra Airport recorded a two-day total of 65.8 mm to 9am on the 12th associated with a complex surface trough over the state. Later in the month, severe thunderstorms on the 21st caused totals of 26.6 mm at the airport to 9am on the 22nd, most of which fell between 6:30 and 7 pm, including 13.4 mm in just 5 minutes.
Temperature - Warm days, cold nights
The average maximum temperature at Canberra airport during November was 23.8 °C, 1.1 °C above the historical average. Only four days dropped below 20 °C during the month (average 9 days), with two consecutive days above 30 °C on the 7th and 8th and a third 30 °C day on the 28th (average 2-3 days).
The average minimum temperature was 6.7 °C, 2.1 °C below the historical average. This is the equal-seventh-coldest November on record for Canberra, and the coldest since 1999. Only five nights remained above 10 °C during the month (average 12 nights), with nine nights dropping below 5 °C (average 5 nights). Two consecutive nights fell below 0 °C during clear conditions and cold southerly winds on the 4th and 5th, the second such event on record for November, with temperatures dropping to -1.5 °C on the 4th.
A fast-moving severe thunderstorm impacted Canberra on the afternoon of the 21st, with localised heavy rain, small hail, and strong wind gusts of 93 km/h at the airport. The storm resulted in some power outages and downed trees but no major damage.
|Extremes in November 2013|
32.0 °C at Canberra Airport on the 8th|
|Warmest days on average||
23.8 °C at Canberra Airport|
|Coolest days on average||
14.9 °C at Mount Ginini AWS|
3.0 °C at Mount Ginini AWS on the 10th|
-4.8 °C at Mount Ginini AWS on the 4th|
|Coolest nights on average||
4.1 °C at Mount Ginini AWS|
|Warmest nights on average||
7.5 °C at Tuggeranong (Isabella Plains) AWS|
14.2 °C at Tuggeranong (Isabella Plains) AWS on the 22nd|
|Warmest on average overall||
15.6 °C at Tuggeranong (Isabella Plains) AWS|
|Coolest on average overall||
9.5 °C at Mount Ginini AWS|
105.6 mm at Canberra Airport|
50.4 mm at Nicholls (Gungahlin Lakes) on the 12th|
|Highest wind gust||
93 km/h at Canberra Airport on the 21st|
|Summary statistics for November 2013|
|Mount Ginini AWS||14.9||21.6||20th||4.1||-4.8||4th||61.8|
|Tuggeranong (Isabella Plains) AWS||23.7||31.7||28th||7.5||1.2||4th||80.4|
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 (all years of record).
A Monthly Climate Summary is prepared to list the main features of the weather in Canberra 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 8 am on Monday 2 December 2013. 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
(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.
The ACORN-SAT dataset is being used for temperature area averages from December 2012 onwards. The major change from earlier datasets is that the ACORN-SAT dataset commences in 1910, rather than 1950, and hence rankings are calculated using a larger set of years.