Greater Sydney in September 2017: driest September on record

September 2017 was the driest start to spring observed in Sydney since observations began in 1858. A blast of warm air towards the end of the month set many temperature records for both hottest day and warmest night.

Sydney's driest month sets new records

  • Little to no rain fell across the Greater Sydney region during September: the only falls of note came in the middle of the month when a passing cold front and associated trough caused localised totals above 5 mm in parts of the central coast and isolated showers elsewhere
  • Many stations had their lowest September rainfall on record including Sydney's Observatory Hill which reported only 0.2 mm, the driest September in 159 years of observations and the driest month since August 1995
  • It's been 59 days since at least 2 mm was recorded at Observatory Hill, making it the longest dry spell of its kind since 22 August to 24 October 1989
  • The dry weather also meant more sunshine across the city: Sydney Airport recorded an average of 9.5 sunshine hours per day for September, the sunniest September since 1980 and the sunniest month since February last year

A very warm start to spring

  • The pattern of warm days in winter has continued into spring; Observatory Hill reported its second warmest September on record for maximum temperatures, while the mean maximum temperature at Parramatta North was more than 2 °C above average
  • Early season warm records were set across the city on the 13th, with many sites reporting temperatures above 33 °C, more than 12 °C above their monthly average
  • High temperatures returned on the weekend of the 23rd as northerly winds drew hot air in from central Australia; many stations reported their highest September maximum and minimum temperatures on record, including the warmest September night on record for Observatory Hill
  • The temperatures recorded across the city were the warmest ever recorded in Greater Sydney in September: Penrith Lakes (37.3 °C), Richmond (36.9 °C), Camden (36.5 °C), Parramatta North (36.5 °C) and Badgerys Creek (36.4 °C) all beat the previous September maximum of 36.1 °C recorded at Gosford on the 26th of September 1965
  • Observatory Hill reached 33.8 °C on the 13th and 32.2 °C on the 23rd, two of only 22 September days to reach more than 32 °C in the station's history; 12 of the 22 days have been recorded since 2000 and the only other Septembers with two days above 32 °C have occurred since 2008
  • Observatory Hill also reported 28.1 °C at 6am on 24 September, the warmest 6am temperature out of the summer months since April 1986 and the warmest September 6am temperature there since hourly observations began in 1955
  • Cool nights persist in the west

  • Despite the warmth on the weekend of the 23rd and 24th, minimum temperatures were slightly below average for the month as a whole, particularly in the west: a couple of sites had their lowest September mean daily minimum temperature in at least 20 years
  • Overnight temperatures dropped to less than 1 °C in parts of the outer suburbs on the 17th and 18th, the coldest temperature on record so late in the spring for some stations: Badgery Creek recorded 0.5 °C on the 17th, the coldest night since 23 July

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Extremes in September 2017
Hottest day 37.3 °C at Penrith Lakes AWS on the 23rd
Warmest days on average 25.0 °C at Cooranbong (Lake Macquarie AWS) and
Richmond RAAF
Coolest days on average 16.1 °C at Mount Boyce AWS
Coldest day 6.1 °C at Mount Boyce AWS on the 14th
Coldest night -0.6 °C at Katoomba (Murri St) on the 1st
Coolest nights on average 5.6 °C at Mount Boyce AWS
Warmest nights on average 13.2 °C at Sydney Harbour (Wedding Cake West)
Warmest night 24.1 °C at Springwood (Valley Heights) on the 24th
Warmest on average overall 18.0 °C at Norah Head AWS
and Sydney Airport AMO
Coolest on average overall 10.9 °C at Mount Boyce AWS
Wettest overall 13.0 mm at Norah Head AWS
Driest overall 0 mm at several stations including
Audley (Royal National Park),
Marrickville Golf Club and
Sans Souci (Public School)
Wettest day 12.4 mm at Cooranbong (Lake Macquarie AWS) on the 14th
Strongest wind gust 102 km/h at Badgerys Creek AWS on the 24th

Record lowest September total rainfall
New record
(mm)
Old
record
Years of
record
Average for
September
Sydney (Observatory Hill) 0.2 2.1 in 1882 160 67.9
Darkes Forest (Kintyre) 0.8 1.0 in 1980 120 76.8
Sans Souci (Public School) 0.0 2.6 in 1980 118 60.9
Sydney Airport AMO 0.8 1.6 in 1989 89 59.7
Turramurra (Kissing Point Road) 1.0 2.0 in 1989 84 69.8
Marrickville Golf Club 0.0 3.1 in 1968 83 55.2
Pennant Hills (Yarrara Road) 0.6 1.4 in 1957 78 55.4
Frenchs Forest (Frenchs Forest Rd) 0.0 1.8 in 1989 60 68.7
Castle Cove (Rosebridge Ave) 0.2 1.0 in 1989 58 68.7
Parramatta North (Masons Drive) 0.4 = 0.4 in 1989 53 51.5
Bankstown Airport AWS 0.6 = 0.6 in 1989 50 42.9
Mount Wilson (Clarine) 3.0 7.2 in 1980 45 67.5
Camden Airport AWS 0.2 1.6 in 1989 43 38.3
Audley (Royal National Park) 0.0 0.2 in 1989 35 55.0
Castle Hill (Kathleen Ave) 0.6 3.8 in 2003 31 52.8
Collaroy (Long Reef Golf Club) 1.2 3.8 in 1972 30 70.2
Chatswood Bowling Club 0.0 7.6 in 1957 28 49.7
Belrose (Evelyn Place) 0.8 4.0 in 2003 26 66.8
Box Hill (McCall Gardens) 0.0 3.0 in 2003 25 33.8
Mount Boyce AWS 0.4 8.0 in 1994 24 53.0
Richmond RAAF 0.2 4.2 in 2009 24 44.2
Penrith Lakes AWS 0.2 4.2 in 2003 23 30.6
Badgerys Creek AWS 1.4 6.4 in 2002 22 32.3
Horsley Park Equestrian Centre AWS 1.6 6.0 in 2003 20 34.1

Lowest September total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Average for
September
Sydney Botanic Gardens 0.6 0.0 in 1899* 68.0
Katoomba (Murri St) 2.2 1.0 in 1957 71.0
Blackheath (Evans Lookout Rd) 2.8 1.5 in 1957* 63.0
Springwood (Valley Heights) 2.0 1.0 in 1957* 54.6
Kurrajong Heights (Bells Line of Road) 1.0 0.3 in 1957* 63.7
Prospect Reservoir 1.2 0.4 in 1989 46.0
Randwick (Randwick St) 2.0 0.6 in 1989 65.9
Rose Bay (Royal Sydney Golf Club) 5.3 1.0 in 1989 71.6
Lucas Heights (ANSTO) 1.0 0.6 in 1989* 50.9
Mona Vale Golf Club 1.6 0.0 in 1989* 59.6

* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported




Record highest September temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Katoomba (Murri St) 28.6 on the 23rd 26.6 on the 26th in 1965 55 14.6
Parramatta North (Masons Drive) 36.5 on the 23rd 35.4 on the 22nd in 2003 51 21.7
Camden Airport AWS 36.5 on the 23rd 36.0 on the 30th in 1980 41 22.0
Mount Boyce AWS 27.6 on the 23rd 25.5 on the 22nd in 2003 26 14.7
Mangrove Mountain AWS 34.0 on the 23rd 32.6 on the 22nd in 2003 24 20.5
Richmond RAAF 36.9 on the 23rd 35.0 on the 22nd in 2003 24 22.7
Penrith Lakes AWS 37.3 on the 23rd 35.8 on the 22nd in 2003 23 23.2
Badgerys Creek AWS 36.4 on the 23rd 34.8 on the 29th in 2000 22 22.5
Horsley Park Equestrian Centre AWS 36.0 on the 23rd 34.3 on the 22nd in 2003 21 22.3



Record highest September daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Sydney (Observatory Hill) 23.0 on the 24th 22.0 on the 24th in 2003 159 11.1
Sydney Airport AMO 21.8 on the 24th 21.2 on the 12th in 1946 79 10.5
Mangrove Mountain AWS 22.7 on the 24th 21.0 on the 23rd in 2003 24 9.3
Norah Head AWS 19.6 on the 24th 19.0 on the 24th in 2003 23 12.8
Badgerys Creek AWS 17.0 on the 24th 16.7 on the 23rd in 2003 22 7.8



Record lowest September mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Canterbury Racecourse AWS 8.2 = 8.2 in 2012 20 9.5

Lowest September mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
September
Bankstown Airport AWS 7.3 6.3 in 1994 8.7



Summary statistics for September 2017
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
September
2017
Diff
from
average
Highest for
September
2017
Mean for
September
2017
Diff
from
average
Lowest for
September
2017
Total for
September
2017
Average
for
September
Rank of
September
2017
Fraction of
September
average
Badgerys Creek AWS 24.1 +1.6 36.4 23rd 6.5 -1.3 0.5 17th 1.4 32.3 lowest 4%
Bankstown Airport AWS 23.7 +2.1 35.0 13th 7.3 -1.4 2.7 2nd 0.6 42.9 lowest 1%
Camden Airport AWS 24.1 +2.1 36.5 23rd 5.9 -0.9 -0.3 2nd 0.2 38.3 lowest 1%
Campbelltown (Mount Annan) 23.7 +1.4 35.7 23rd 6.4 -1.1 0.6 18th 0.2 32.0 v low 1%
Canterbury Racecourse AWS 23.4 +1.5 34.4 23rd 8.2 -1.3 4.0 18th 0.2 44.5 v low 0%
Cooranbong (Lake Macquarie AWS) 25.0   34.8 23rd 6.0   0.9 2nd 12.4 55.7 v low 22%
Gosford AWS 24.1   34.2 13th 8.9   3.7 2nd 2.4
Holsworthy Aerodrome AWS 23.7   36.0 23rd 7.5   0.5 18th 0.8
Horsley Park Equestrian Centre AWS 24.1 +1.8 36.0 23rd 8.3 -1.1 2.8 17th 1.6 34.1 lowest 5%
Katoomba (Murri St) 17.3 +2.7 28.6 23rd 6.4 +1.0 -0.6 1st 2.2 71.0 v low 3%
Mangrove Mountain AWS 23.5 +3.0 34.0 23rd 8.3 -1.0 2.8 2nd 3.8 63.2 v low 6%
Mount Boyce AWS 16.1 +1.4 27.6 23rd 5.6 +0.2 -0.1 9th 0.4 53.0 lowest 1%
Norah Head AWS 23.4 +2.4 33.0 13th 12.6 -0.2 9.5 1st 13.0 61.9 v low 21%
Parramatta North (Masons Drive) 23.9 +2.2 36.5 23rd 8.6 -0.8 3.5 10th 0.4 51.5 lowest 1%
Penrith Lakes AWS 24.9 +1.7 37.3 23rd 8.1 -1.3 3.8 10th 0.2 30.6 lowest 1%
Prospect Reservoir 24.2 +2.8 34.4 13th 8.7 -0.7 3.8 2nd 1.2 46.0 v low 3%
Richmond RAAF 25.0 +2.3 36.9 23rd 6.2 -1.9 0.9 1st 0.2 44.2 lowest 0%
Springwood (Valley Heights) 22.6 +1.3 34.6 23rd 10.3 +0.9 4.6 18th 2.0 54.6 v low 4%
Sydney (Observatory Hill) 23.3 +3.2 33.8 13th 12.2 +1.1 7.8 2nd 0.2 67.9 lowest 0%
Sydney Airport AMO 24.1 +3.5 35.3 13th 12.0 +1.5 7.2 17th 0.8 59.7 lowest 1%
Sydney Harbour (Wedding Cake West) 21.4 +1.7 33.3 13th 13.2 -0.2 9.4 2nd
Sydney Olympic Park AWS (Archery Centre) 24.2   35.6 23rd 8.6   4.7 18th 0.4
Terrey Hills AWS 22.4 +1.7 33.1 23rd 10.9 -0.3 5.5 17th 0.4 58.1 v low 1%
Note: From 2017, information about Lord Howe and Norfolk Islands can be found in the climate summary for the Remote Islands and Antarctica

Daily maximum temperatures for September 2017
123456789101112131415161718192021222324252627282930
Badgerys Creek AWS18.722.229.421.418.119.020.720.119.520.124.228.533.717.221.923.119.427.023.121.126.930.036.429.926.123.425.525.426.124.2
Bankstown Airport AWS18.223.329.422.918.819.421.220.119.219.524.828.935.017.722.424.218.827.224.221.427.231.223.224.826.226.424.6
Camden Airport AWS18.722.329.421.417.818.319.719.519.720.725.228.333.317.420.922.820.027.222.221.226.930.036.529.326.024.925.925.826.124.3
Campbelltown (Mount Annan)19.321.828.721.117.817.719.619.219.920.225.028.433.016.820.722.519.626.622.121.126.729.935.728.925.823.625.125.625.723.6
Canterbury Racecourse AWS17.121.829.021.818.419.220.719.917.718.724.427.933.616.822.223.117.224.923.820.124.630.134.429.127.121.223.025.225.923.8
Cooranbong (Lake Macquarie AWS)18.023.329.723.820.221.622.021.518.919.725.129.633.917.523.625.918.026.827.320.627.931.134.834.129.622.923.927.226.925.7
Gosford AWS17.021.728.922.919.520.421.820.617.619.522.429.434.217.123.225.117.724.925.319.025.731.633.833.027.422.123.525.626.425.5
Holsworthy Aerodrome AWS18.022.028.621.718.118.520.419.718.818.824.128.434.117.121.422.718.926.722.920.926.230.436.029.526.622.423.825.226.023.5
Horsley Park Equestrian Centre AWS18.722.728.821.317.818.920.820.019.420.024.529.333.716.922.023.419.327.423.421.127.530.636.029.626.522.825.125.225.823.7
Katoomba (Murri St)15.419.722.012.69.09.611.611.416.115.618.422.824.78.012.413.416.420.815.218.624.025.028.618.717.420.621.415.718.315.8
Mangrove Mountain AWS17.122.327.620.918.019.120.119.117.518.623.828.632.515.721.723.218.126.125.020.027.430.534.031.125.423.124.124.825.623.7
Mount Boyce AWS14.216.621.011.17.78.510.49.914.015.717.521.924.06.111.212.416.019.913.218.022.824.227.617.713.919.323.114.516.313.9
Norah Head AWS16.422.824.023.119.920.821.921.016.419.822.927.033.017.622.225.318.822.925.020.024.027.331.832.827.121.422.825.024.325.4
Parramatta North (Masons Drive)18.622.228.818.818.219.221.020.019.019.724.329.033.817.022.623.319.427.221.026.731.036.529.626.522.324.225.325.224.0
Penrith Lakes AWS19.422.129.922.218.719.721.520.320.220.925.128.934.417.922.623.820.328.724.721.927.631.737.330.426.625.227.125.626.924.8
Prospect Reservoir19.023.029.421.518.419.020.919.520.120.924.529.834.416.722.323.320.428.223.621.828.831.431.129.126.023.625.926.024.0
Richmond RAAF19.023.430.422.418.819.321.520.919.620.624.630.534.018.223.024.419.828.524.522.028.731.836.930.126.724.627.626.526.725.5
Springwood (Valley Heights)16.720.728.520.016.018.019.218.617.518.422.328.032.015.021.021.717.527.122.519.625.129.134.628.024.122.423.923.324.922.7
Sydney (Observatory Hill)19.219.427.222.218.719.921.920.419.419.122.727.233.817.322.824.218.621.025.219.021.327.732.229.226.722.222.725.726.924.1
Sydney Airport AMO16.621.028.923.719.820.621.821.117.318.625.028.035.318.223.224.817.423.924.520.024.530.633.930.828.820.624.526.627.624.7
Sydney Harbour (Wedding Cake West)15.917.927.220.817.318.419.718.716.117.319.225.733.315.621.222.116.120.622.018.119.422.930.728.925.018.423.424.123.323.2
Sydney Olympic Park AWS (Archery Centre)18.322.829.822.018.519.821.920.518.920.125.029.333.617.222.924.518.427.424.220.324.531.435.629.826.822.524.125.326.824.7
Terrey Hills AWS16.020.127.520.617.218.319.819.216.518.222.126.633.015.621.622.816.324.223.718.024.229.633.128.625.220.821.623.925.223.4
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 2017
123456789101112131415161718192021222324252627282930
Badgerys Creek AWS4.01.14.04.18.59.95.16.57.61.72.55.36.88.810.07.70.51.25.14.24.95.47.217.08.25.610.614.16.311.9
Bankstown Airport AWS5.22.75.18.06.011.16.48.74.83.84.26.37.610.49.19.53.23.07.06.77.112.815.17.910.4
Camden Airport AWS2.3-0.32.94.010.09.57.09.06.20.51.44.34.29.910.78.00.40.23.82.43.23.86.515.39.93.811.014.75.88.0
Campbelltown (Mount Annan)1.41.24.34.97.77.610.35.22.51.53.35.06.510.011.07.51.20.65.23.94.95.66.820.19.33.710.214.86.510.1
Canterbury Racecourse AWS6.84.26.47.76.511.55.49.27.74.24.97.19.111.26.78.14.94.08.17.67.57.89.318.18.36.412.715.28.710.9
Cooranbong (Lake Macquarie AWS)8.30.93.36.63.56.23.71.99.31.31.64.48.810.25.56.13.71.56.42.83.34.87.713.88.85.810.213.95.510.3
Gosford AWS8.43.76.06.66.411.89.37.18.93.95.27.113.410.59.38.26.54.310.18.66.58.010.619.810.27.612.415.18.513.4
Holsworthy Aerodrome AWS4.01.54.17.26.510.27.68.75.12.02.35.510.210.111.18.71.00.59.26.84.86.18.818.910.55.911.415.06.913.5
Horsley Park Equestrian Centre AWS6.23.45.36.410.29.05.76.47.83.55.17.115.29.76.78.62.82.89.97.16.27.512.818.711.47.510.515.37.611.7
Katoomba (Murri St)-0.64.39.85.22.30.04.11.31.45.310.013.42.40.05.91.24.49.02.27.814.315.316.09.46.87.110.27.69.0
Mangrove Mountain AWS3.52.88.56.07.09.15.24.03.13.48.316.87.76.27.73.33.013.93.85.99.718.422.712.76.38.213.68.512.0
Mount Boyce AWS0.53.18.34.02.02.23.03.5-0.11.13.48.113.91.22.14.81.03.37.71.96.811.815.914.78.35.56.610.95.68.0
Norah Head AWS9.59.911.012.510.411.79.79.69.69.511.113.217.810.610.011.69.610.015.510.611.412.916.819.617.613.515.217.114.616.3
Parramatta North (Masons Drive)5.04.58.69.09.210.77.96.28.03.55.27.315.09.97.09.85.04.010.35.26.78.310.015.511.36.512.016.08.312.2
Penrith Lakes AWS4.94.05.96.810.912.16.05.75.83.85.67.78.99.96.78.35.04.17.55.96.87.510.315.111.07.512.415.49.911.6
Prospect Reservoir6.03.86.17.09.211.07.36.57.84.54.88.015.69.96.89.43.86.112.86.77.68.810.717.110.97.610.915.511.5
Richmond RAAF0.91.53.77.07.511.06.37.61.71.22.54.512.89.86.46.42.10.96.61.93.94.96.913.79.04.710.913.46.810.8
Springwood (Valley Heights)5.55.810.08.49.510.010.010.46.16.76.911.917.86.99.510.65.04.613.45.57.512.617.224.113.19.011.514.311.013.7
Sydney (Observatory Hill)8.27.810.012.011.411.510.011.19.68.08.711.318.212.010.512.58.18.214.010.710.412.815.523.016.012.315.418.013.016.3
Sydney Airport AMO7.77.410.012.810.612.210.510.88.57.59.112.116.111.611.713.17.27.812.110.010.412.715.421.816.012.414.918.113.115.6
Sydney Harbour (Wedding Cake West)9.59.411.513.112.712.612.412.510.39.510.812.816.312.412.313.49.510.814.411.811.513.515.720.716.814.915.717.214.416.5
Sydney Olympic Park AWS (Archery Centre)6.84.86.97.29.18.95.76.19.14.96.07.612.111.26.58.45.54.79.36.27.98.49.517.19.57.513.115.69.211.7
Terrey Hills AWS7.06.010.29.49.810.38.37.38.36.37.411.618.59.37.310.45.58.715.18.18.714.219.621.615.411.111.316.111.614.0
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 2017
123456789101112131415161718192021222324252627282930
Abbotsbury (Fairfield (City Farm)) - - - - - - - - - - - - 1.0 - - - - - - - - - - - - - - - -
Audley (Royal National Park) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Badgerys Creek AWS - - - - - - - - - - - - - 1.4 - - - - - - - - - - - - - - - -
Bankstown Airport AWS - - - - - - - - - - - - - 0.6 - - - - - - - -



- - - -
Baulkham Hills Eucalyptus Ct - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Belrose (Evelyn Place) - - - - - - - - - - - - - 0.8















Blackheath (Evans Lookout Rd) -











1.0








0.2

1.0 0.6
Blackheath (Wombat Street) - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1.0 -
Box Hill (McCall Gardens) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Camden Airport AWS - - - - - - - - - - - - - - - - - - - - - - - - - 0.2 - - - -
Campbelltown (Kentlyn (Georges River Roa - - - - - - - - - - - - - 1.0 - - - - - - - - - - - - - - - -
Campbelltown (Mount Annan) - - - - - - - - - - - - - - - - - - - - - - - - - 0.2 - - - -
Canterbury Racecourse AWS - - - - - - - - - - - - - 0.2 - - - - - - - - - - - - - - - -
Castle Cove (Rosebridge Ave) - - - - - - - - - - - - - 0.2















Castle Hill (Kathleen Ave) - - - - - - - - - - - - - 0.6















Chatswood Bowling Club - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Collaroy (Long Reef Golf Club) 1.2




























Concord (Brays Rd) - - - - - - - - - - - - - 0.4















Cooranbong (Avondale) - - - - - - - - - - - - - 12.0 - - - - - - - - - - - - - - - -
Cooranbong (Lake Macquarie AWS) - - - - - - - - - - - - - 12.4 - - - - - - - - - - - - - - - -
Darkes Forest (Kintyre) - - - - - - - - - - - - - 0.6 0.2 - - - - - - - - - - - - - - -
Dover Heights (Portland St) 4.6




























Erskine Park Reservoir - - - - - - - - - - - - - 1.0 - - - - - - - - - - - - - - - -
Faulconbridge (Great Western Hwy) - - - - - - - - - - - - - 2.0 - - - - - - - - - - - - - - - -
Frenchs Forest (Frenchs Forest Rd) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gosford AWS - - - - - - - - - - - - - 2.4 - - - - - - - - - - - - - - - -
Holsworthy Aerodrome AWS - - - - - - - - - - - - - 0.8 - - - - - - - - - - - - - - - -
Hornsby (Swimming Pool) - - - - - - - - - - - - - 0.6 - - - - - - - - - - - - - - - -
Horsley Park Equestrian Centre AWS - - - - - - - - - - - - - 1.4 0.2 - - - - - - - - - - - - - - -
Katoomba (Murri St) - - - - - - - - - - - - - 0.6 - - - - - - - - - - - - - 1.0 0.6 -
Kurrajong Heights (Bells Line of Road) - - - - - - - - - - - - - 1.0















Lucas Heights (ANSTO) - - - - - - - - - - - - - 1.0 - - - - - - - - - - - - - - - -
Mangrove Mountain AWS - - - - - - - - - - - - - 3.8 - - - - - - - - - - - - - - - -
Marrickville Golf Club - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Menangle Bridge (Nepean River) 1.0 - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Milperra Bridge (Georges River) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Mona Vale Golf Club 0.4 0.2 0.2 - - - - - - - 0.2 - - 0.4 - - - - - - 0.2 - - - - - - - - -
Mount Boyce AWS - - - - - - - - - - - - - 0.2 - - - - - - - - - - - - - - 0.2 -
Mount Wilson (Clarine) - - - - - - - - - - - - - 3.0 - - - - - - - - - - - - - - - -
Norah Head AWS 1.2 0.2 - - - - - - - - - - - 11.6 - - - - - - - - - - - - - - - -
North Parramatta (Burnside Homes) - - - - - - - - - - - - - - - - - - - - - - - - - - - -

North Rocks (Muirfield Golf Club) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
North Ryde Golf Club - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Parramatta North (Masons Drive) - - - - - - - - - - - - - 0.4 - - - - - - - - - - - - - - - -
Peakhurst Golf Club - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Pennant Hills (Yarrara Road) - - - - - - - - - - - - - 0.6 - - - - - - - - - - - - - - - -
Penrith Lakes AWS - - - - - - - - - - - - - 0.2 - - - - - - - - - - - - - - - -
Picton Council Depot - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Prospect Reservoir - - - - - - - - - - - - - 1.2 - - - - - - - - - - - - - - - -
Putty (The Gibba) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Randwick (Randwick St) 1.8 - - - - - - - - - - - - 0.2















Richmond RAAF - - - - - - - - - - - - - 0.2 - - - - - - - - - - - - - - - -
Rose Bay (Royal Sydney Golf Club) 5.2 - - - - - - - - - - - - 0.1 - - - - - - - - - - - - - - - -
Rossmore (South Creek) - - - - - - - - - - - - - 1.0 - - - - - - - - - - - - - - - -
Sans Souci (Public School) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Seven Hills (Radio FM 103.2) - - - - - - - - - - - - - 0.5 - - - - - - - - - - - - - - - -
Shanes Park (South Creek Road) - - - - - - - - - - - - 0.8 - - - - - - - - - - - - - - - -
Springwood (Valley Heights) - - - - - - - - - - - - - 2.0 - - - - - - - - - - - - - - - -
St Ives (Richmond Avenue) - - - - - - - - - - - - - 0.8















Sydney (Observatory Hill) - - - - - - - - - - - - - 0.2 - - - - - - - - - - - - - - - -
Sydney Airport AMO 0.2 - - - 0.2 - - - - - - - - - 0.2 - - - - - - - - - - - - - - 0.2
Sydney Botanic Gardens - - - - - - - - - - - - - 0.6 - - - - - -









Sydney Olympic Park AWS (Archery Centre) - - - - - - - - - - - - - 0.4 - - - - - - - - - - - - - - - -
Terrey Hills AWS - - - - - - - - - - - - - 0.4 - - - - - - - - - - - - - - - -
Turramurra (Kissing Point Road)












1.0














-
Wahroonga (Ada Avenue) - - - - - - - - - - - - - 0.8 - - - - - - - - - - - - - - - -
Warragamba









- - - - - - - - - - - - - - - - - - - -
Wedderburn (Booalbyn) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Wyong (Jilliby (Jilliby Creek)) - - - - - - - - - - - - - 4.4 - - - - - - - - - - - - - - - -
Wyong (Kulnura (Jeavons)) - - - - - - - - - - - - - 4.0 - - - - - - - - - - - - - - - -
Wyong (Mount Elliot) - - - - - - - - - - - - - 2.0 - - - - - - - - - - - - - - - -
Wyong (Olney Forest) - - - - - - - - - - - - - 7.0 - - - - - - - - - - - - - - - -
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, generally published on the first working day of each month, lists the main features of the weather in Greater Sydney using the most timely and accurate information available on the date of publication; it will generally not be updated. More extensive discussion of significant weather events, along with later information and data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

In September 2017 this summary was broadened to include data from observing sites in or near the Greater Sydney “Greater Capital City Statistical Area” (GCCSA). The Australian Bureau of Statistics designed the GCCSAs to “include the population within the urban area of the city, as well as people who regularly socialise, shop or work within the city, and live in small towns and rural areas surrounding the city. It is important to note that GCCSAs do not define the built up edge of the city. They provide a stable definition for these cities and are designed for the output of a range of social and economic survey data.

This statement has been prepared based on information available at 10 am on Monday 2 October 2017. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

In some situations, some or all of the rainfall is in the form of hail or snow. In these cases the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.

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.

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.

Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

Further information

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