Friday 01 December 2006 - Monthly Climate Summary for Sydney - Product code IDCKGC15L0

Warm days with below average rainfall in Sydney during November

Summary:  A month of contrasts. Cool during first half of month followed by heatwave conditions.  Rainfall was below average.

Details

  • Average maximum temperature was 0.7°C above the historic average.
  • There were 3 days when temperature exceeded 30°C (normally 2 days).
  • Mild nights on coast but cool in western suburbs.
  • Below average rainfall but close to average sunshine.

Rainfall November 2006

The total monthly rainfall of 44.6 mm was below the historic November average of 83.3 mm. There were 12 rain days, which was slightly above the historic average of 11 rain days.  Much of the rain fell during the first half of the month.  While some northern suburbs received falls of 60−70 mm, several far western suburbs recorded less than 20 mm. Metropolitan rainfall totals ranged from 74 mm at Turramurra in Sydney's north to only 16.8 mm at Penrith in the far west.

Rainfall in the Warragamba Dam catchment area during November was mostly light with totals generally less than 50 mm.  Recent rainfall in Sydney's catchments can be found on the Sydney Catchment Authority web site at: http://www.sca.nsw.gov.au/dams/rainfall.html

Temperatures November 2006

Temperatures varied considerably during November;  they were below average during the first half of the month but well above average toward the end of the month with several very hot days recorded.  The average maximum temperature at Observatory Hill was 24.3°C, a little above the historic average1 of 23.7°C.   There were 3 hot days (temperature exceeding 30°C) compared to the historic average of 2 hot days.  Far western suburbs recorded average maximum temperatures 3−4°C warmer than Sydney Observatory Hill with an average of 28.2°C at Richmond and Camden.  The western suburbs recorded 10 hot days compared to the historic average of 8 days.

Although nights were cool early in the month, milder conditions followed, with the average minimum temperature at Observatory Hill of 16.5°C being 0.9°C above the historic average.  However, in far western suburbs, nights were significantly cooler and below the November average.  At Camden the average minimum of 12.3°C was 0.4°C below the historic average and more than 4°C lower than coastal suburbs.  Following a significant cold change on the 16th, Sydney's minimum of 8.3°C was the lowest temperature in November since 1905.

The highest temperature at Sydney Observatory Hill during November was 38.4°C on the 22nd while the lowest was 8.3°C on the 16th.  Corresponding extremes across the Sydney metropolitan area ranged from 40.9°C at Penrith on the 21st to 5.7°C at Badgerys Creek on the 17th.

Wind

November was a windy month with 9 strong wind days recorded at Sydney Airport (historic average 7).  However, wind speeds were lower in the western suburbs with Richmond recording 4 windy days (historic average 1 day).  The highest wind gust in the Metro area was 85 km/h (from the NW) at Badgerys Creek on the 22nd

Other phenomena

Sunshine hours were close to average.  There was 1 thunderstorm at Observatory Hill during November.  Thick smoke haze from bushfires in the Blue Mountains reduced visibility to around 5−10km over Sydney from 20th to 22nd.  A sea fog occurred in coastal suburbs on the 29th reducing visibility to less than 1 km at times.   

Further information

Mike De Salis
NSW Climate Services Centre
Bureau of Meteorology
Phone (02) 9296 1542
Email reqnsw@bom.gov.au

Summaries for November 2006

Summary statistics for November 2006
Maximum temperatures
for November
(°C)
Minimum temperatures
for November
(°C)
Rainfall
for November
(millimetres)
Mean for
November
2006
Diff
from
normal
Highest for
November
2006
Mean for
November
2006
Diff
from
normal
Lowest for
November
2006
Total for
November
2006
Normal
for
November
Rank of
November
2006
Fraction of
November
normal
Sydney (Observatory Hill) 24.3 +0.6 38.4 22nd 16.5 +0.9 8.3 16th 44.6 83.3 normal 53%
Camden 28.2 +2.3 40.0 28th 12.3 −0.4 5.5 15th

22.6

73.7

low

31%

Parramatta 26.7 +1.1 38.5 21st 14.3 +0.3 7.4 17th 45.6 85.1 normal 54%
Richmond 28.2 +1.7 39.3 22nd 13.4 −0.4 6.6 17th 28.4 76.1 low 37%
Springwood 26.5 37.0 21st 12.8 6.7 17th 42.8 95.5 low 45%
Terrey Hills 24.1 36.8 22nd 14.8 5.8 16th 56.2

 

Extremes for November 2006

Hottest day
Highest temperature
40.9°C at Penrith on the 21st
Warmest days on average
Highest mean daily maximum temperature
28.2°C at Richmond and Camden
Coolest days on average
Lowest mean daily maximum temperature
24.1°C at Terrey Hills
Coldest day
Lowest daily maximum temperature
15.0°C at Terrey Hills on the 16th
Coldest night
Lowest temperature
5.7°C at Badgerys Creeks on the 17th
Coolest nights on average
Lowest mean daily minimum temperature
12.3°C at Camden
Warmest nights on average
Highest mean daily minimum temperature
16.5°C at Sydney (Observatory Hill)
Warmest night
Highest daily minimum temperature
27.2°C at Terrey Hills on the 22nd
Wettest overall
Highest total rainfall
74.0 mm at Turramurra
Driest overall
Lowest total rainfall

16.8 mm at Penrith

Highest wind gust
85 km/h at Badgerys Creek on the 22nd


 

Summary phenomena for Sydney for November 2006
 

November 2006

Normal for November

Number of rain days

12

11

Average sunshine hours per day*

7.4

7.7

Average humidity at 3pm (%)

56

58

Number of thunderstorms

1

4

Number of windy days*

 9

7

* recorded at Sydney Airport.  Windy day defined as average speed of 40km/h or more at synoptic times.


Notes

This statement has been prepared based on information available at 2 pm on Friday 01 December 2006. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

1Averages: Historic average temperatures for Observatory Hill and Richmond are based on the period 1961 to 1990 which is a convention of the World Meteorological Organisation.  Average temperatures for Parramatta are based on all available data, 1968 - 2005 and Camden 1972 - 2005.  Rainfall averages and extremes for Observatory Hill are based on all years of record 1859 - 2005.

The Rank indicates about where rainfall this time ranks in the climate record for the site.

Further information

Mike De Salis
NSW Climate Services Centre
Bureau of Meteorology
Phone (02) 9296 1542
Email reqnsw@bom.gov.au