Wednesday, 1 May 2013 - Monthly Climate Summary for Canberra - Product code IDCKGC25R0
Canberra in April 2013: Dry weather brings warm days and cool nights
- Fourth consecutive dry April
- Sixth warmest maximum temperatures on record; longest April mild spell
- Well below average minimum temperatures
Rainfall - Dry month for Canberra
Canberra Airport recorded 9.8 mm of rain during April, well below the historical average of 46 mm and the 11th driest on record. This is the fourth consecutive dry April in Canberra, although not as dry as April 2011 (8.8 mm). The rain fell over seven days, equal to the historical average, with the wettest day recording just 3.4 mm on the 22nd; on average Canberra experiences 2-3 days with at least 5 mm of rain during April.
Temperature - Warm days and cold nights
The average maximum temperature at Canberra Airport during April was 22.1 °C, 2.1 °C above the historical average. This was the equal sixth warmest April on record for Canberra, and the warmest since 2007, associated with the dry conditions during the month. Five days reached at least 25 °C during the month, double the historical average, with just one day dropping below 15 °C (average 3 days) and 9 days below 20 °C (average 15 days).
A particularly warm spell occurred between the 7th and 15th, with nine consecutive days above 24 °C. This is the first such spell on record for Canberra, with the previous latest such spell ending on 31 March 1940. Temperatures also reached 25.7 °C on the 28th; this is only the second time on record with such a warm temperature this late in autumn, following 26.2 °C on 28 April 2005.
The average minimum temperature was 5.5 °C, 1.2 °C below the historical average. This is the coolest April since 2011 (5.4 °C), with only three nights reaching 10 °C (average 6-7 nights) while 14 nights dropped below 5 °C, the most since 2006 (average 10 nights). Two consecutive nights dropped below -1 °C on the 24th and 25th, the coolest spell since 29-30 April 2008. The warm days and cold nights contributed to a mean temperature of 13.8 °C, 0.4 °C above the historical average.
|Extremes in April 2013|
27.6 °C at Tuggeranong (Isabella Plains) AWS on the 14th|
|Warmest days on average||
22.1 °C at Canberra Airport|
|Coolest days on average||
11.8 °C at Mount Ginini AWS|
4.3 °C at Mount Ginini AWS on the 19th|
-1.9 °C at Canberra Airport on the 24th|
|Coolest nights on average||
3.9 °C at Mount Ginini AWS|
|Warmest nights on average||
6.0 °C at Tuggeranong (Isabella Plains) AWS|
12.1 °C at Canberra Airport on the 30th|
12.1 °C at Tuggeranong (Isabella Plains) AWS on the 30th
|Warmest on average overall||
13.9 °C at Tuggeranong (Isabella Plains) AWS|
|Coolest on average overall||
7.9 °C at Mount Ginini AWS|
30.4 mm at Mount Ginini AWS|
7.8 mm at Mount Ginini AWS on the 7th|
|Highest wind gust||76 km/h at Mount Ginini AWS on the 19th|
|Summary statistics for April 2013|
|Mount Ginini AWS||11.8||17.1||14th||3.9||-1.6||19th||30.4|
|Tuggeranong (Isabella Plains) AWS||21.8||27.6||14th||6.0||-0.9||24th||15.2|
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 9 am on Wednesday 1 May 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.