Canberra in September 2016: Second-wettest September on record

Canberra Airport recorded its second-wettest September on record during 2016, with several heavy rain events including the second-wettest September day on record on the 2nd. Daytime temperatures were slightly below average and the coolest in almost 20 years, while a lack of cool nights contributed to the fifth-warmest September minimum temperatures on record for Canberra.

Second-wettest September on record

  • Canberra Airport recorded 149.2 mm of rain, the second-wettest September on record behind 150.6 mm in 1978
  • Rain was recorded on 14 days, above the historical average of 10 days
  • Eight days recorded than 5 mm: more than double the historical average of 3 days and the equal-highest on record with 1962 and 1975
  • Canberra Airport recorded 53.6 mm on the 3rd, the second-wettest September day on record (behind 57.8 mm on 17 September 2013)

Rain brings cool days, warm nights

  • Daytime temperatures at Canberra Airport were slightly below average but the coldest September since 1992
  • The average minimum temperature was 1.5 °C above average, the fifth-warmest September on record and the warmest since 1998
  • Only five nights dropped below 2 °C, the equal-fewest on record for Canberra (average is 12 nights)
  • Maximum temperature was just 10.5 °C on the 2nd, the coldest September day since 27 September 2009

Further information

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Extremes in September 2016
Hottest day 20.0 °C at Canberra Airport on the 8th
Warmest days on average 15.8 °C at Canberra Airport
Coolest days on average 7.0 °C at Mount Ginini AWS
Coldest day 1.1 °C at Mount Ginini AWS on the 15th
1.1 °C at Mount Ginini AWS on the 30th
Coldest night -3.2 °C at Mount Ginini AWS on the 20th
-3.2 °C at Mount Ginini AWS on the 26th
Coolest nights on average 0.5 °C at Mount Ginini AWS
Warmest nights on average 4.9 °C at Tuggeranong (Isabella Plains) AWS
Warmest night 10.2 °C at Canberra Airport on the 25th
10.2 °C at Tuggeranong (Isabella Plains) AWS on the 25th
Warmest on average overall 10.3 °C at Canberra Airport
10.3 °C at Tuggeranong (Isabella Plains) AWS
Coolest on average overall 3.7 °C at Mount Ginini AWS
Wettest overall 241.2 mm at Mount Ginini AWS
Driest overall 108.6 mm at Canberra (Australian National Botanic Ga
Wettest day 53.6 mm at Canberra Airport on the 3rd
Strongest wind gust 76 km/h at Mount Ginini AWS on the 30th

Record highest September total rainfall

New record
(mm)
Old
record
Years of
record
Average for
September
Torrens (Darke St) 149.4 105.4 in 1993 32 58.1
Tuggeranong (Isabella Plains) AWS 151.0 107.8 in 2013 21 63.1



Record lowest September mean daily maximum temperature

New record
(°C)
Old
record
Years of
record
Average for
September
Tuggeranong (Isabella Plains) AWS 15.7 16.1 in 1997 20 17.7



Summary statistics for September 2016

Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
September
2016
Diff
from
average
Highest for
September
2016
Mean for
September
2016
Diff
from
average
Lowest for
September
2016
Total for
September
2016
Average
for
September
Rank of
September
2016
Fraction of
September
average
Canberra Airport 15.8 -0.4 20.0 8th 4.8 +1.5 -1.1 28th 149.2 52.0
v high

Mount Ginini AWS 7.0 -1.7 14.9 5th 0.5 +0.2 -3.2 20th 241.2 93.4 v high 258%
Tuggeranong (Isabella Plains) AWS 15.7 -2.0 19.9 6th 4.9 +1.1 -0.5 28th 151.0 63.1 highest 239%
Note: Observations for "Canberra Airport" are taken from the current site (Bureau number 070351), which opened in late 2008.
Comparisons are made against data from the previous site Canberra Airport Comparison (070014), which ran from 1939 to 2010.

Daily maximum temperatures for September 2016

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Canberra Airport 16.7 10.5 14.6 13.9 16.4 19.4 19.1 20.0 17.4 14.3 15.7 16.6 17.5 18.3 12.9 15.7 17.0 13.1 14.6 14.5 11.7 14.9 18.2 19.2 18.3 15.3 14.3 16.9 14.7 12.1
Mount Ginini AWS 9.8 4.4 2.8 11.3 14.9 13.4 9.6 10.0 6.8 4.5 7.5 10.2 6.4 6.8 1.1 3.5 7.9 3.7 7.5 8.1 4.2 4.5 10.1 10.4 5.9 5.4 5.5 9.4 3.8 1.1
Tuggeranong (Isabella Plains) AWS 17.0 10.7 15.6 15.5 16.1 19.9 18.5 19.7 14.0 14.5 16.1 17.0 16.5 16.6 12.7 15.8 17.0 11.9 16.7 14.5 11.8 15.2 17.7 18.7 18.3 16.4 14.4 17.1 14.3 12.1
Values are the maximum temperature, usually in the 24 hours from 9 am on the day indicated,
and typically occurred in the afternoon of that day.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 °C Grey outline marks highest
and lowest for the period


Daily minimum temperatures for September 2016

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Canberra Airport 4.3 5.6 9.1 4.9 2.9 0.6 2.7 6.9 5.2 9.5 2.8 1.3 5.7 10.1 6.0 6.8 0.4 4.4 6.4 1.8 6.7 6.9 5.5 2.7 10.2 2.5 3.3 -1.1 4.9 4.9
Mount Ginini AWS 0.7 1.6 1.7 -1.6 -0.5 6.6 3.0 4.3 3.7 1.9 -0.6 -2.2 1.3 3.3 -2.2 -1.7 -1.6 1.6 -0.3 -3.2 1.0 0.8 1.4 2.2 1.8 -3.2 -1.9 -2.3 1.4 -2.6
Tuggeranong (Isabella Plains) AWS 5.7 5.5 8.9 3.7 3.7 1.0 2.4 8.0 5.4 9.5 5.3 0.7 6.7 10.0 4.9 6.6 0.0 5.5 5.0 1.2 7.4 5.9 4.2 2.7 10.2 0.8 5.2 -0.5 5.6 5.2
Values are the minimum temperature, usually in the 24 hours to 9 am on the day indicated,
and typically occurred that morning.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 °C Grey outline marks highest
and lowest for the period


Daily rainfall for September 2016

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Canberra (Australian National Botanic Ga 2.0 - 42.6 0.6 - - - - - 15.0 0.8 - - 0.1 6.8 0.6 - - 7.8 - 9.1 21.6 - - - - 1.6


Canberra Airport 1.8 - 53.6 1.0 - - - - - 15.2 0.4 - - - 5.2 0.2 - - 6.6 - 6.8 24.2 0.2 - - - 1.6 - 13.4 19.0
Mount Ginini AWS 6.8 - 45.4 2.8 0.2 - - - - 46.6 11.2 - - 2.8 24.2 6.4 - - 10.0 - 6.0 13.8 0.8 5.2 - - 6.0 - 18.0 35.0
Nicholls (Gungahlin Lakes) 3.8 - 33.0 6.0 - - - - - 13.2 1.0 - - - 6.2 - - - 8.2 - 9.4 23.8 - - - - 1.2 - 19.0 20.2
Torrens (Darke St) 1.0 - 48.6 0.6 - - - - - 15.8 1.0 - - - 4.0 0.2 - 6.0 - - 26.4 0.2 - - - - 0.4 - 21.2 24.0
Tuggeranong (Isabella Plains) AWS 0.2 - 48.2 0.6 - - - - - 16.6 1.2 - - - 4.4 0.2 - - 8.2 - 6.6 20.2 - - - - 0.6 - 21.8 22.2
Most values are the precipitation in the 24 hours to 9 am on the day indicated. Days marked with ? are part of a longer accumulation, which is shown on the final day.
Values over 100 mm have been rounded to the nearest whole millimetre.
Days marked with - have a rainfall report of zero; days left blank have no rainfall report (which often indicates no rain fell).
Rainfalls coloured
according to the amount
0 1.0 5.0 10.0 15.0 25.0 50.0 100 150 200 300 400 600 millimetres

Notes

The Monthly climate summary lists 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.

A climate summary is generally published on the first working day of each month.

This statement has been prepared based on information available at 10 am on Tuesday 4 October 2016. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Averages for individual sites 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 10 years of record, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of long-term average rain.

Observations for "Canberra Airport" are taken from the current site (Bureau number 070351), which opened in late 2008.
Comparisons are made against data from the previous site Canberra Airport Comparison (070014), which ran from 1939 to 2010.

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.

The ACORN-SAT dataset is used for temperature area averages.

Further information

Media
(03) 9669 4057
Enquiries