Greater Sydney in September 2018: relatively cool conditions and average rainfall

Greater Sydney in September 2018 was relatively cool. Monthly maximum temperatures were close to the station averages, while minimum temperatures were generally below the station average. Monthly rainfall totals were slightly below average, except around Canterbury and Bankstown where there was a severe thunderstorm on the 7th.

Slightly below average rainfall

  • There was steady rainfall across Greater Sydney in the first week of September, and on the 26th and 27th
  • Monthly totals were slightly below average, except around the Canterbury-Bankstown area
  • A major thunderstorm on the 7th resulted in totals of 30-60 mm in the 24 hours to 9am on the 8th. The highest total was 67.0 mm at Bankstown Airport

Temperatures close to average

  • Daytime maximum temperatures were close to average across Greater Sydney for September
  • A warm spell in the second week culminated in temperatures in the low 30s across the city on the 15th
  • Night time minimum temperatures were generally cool, with the warmest nights occurring during the middle of the month
  • The long-term sites at Observatory Hill, Sydney Airport and Parramatta North had their lowest September mean daily minimum temperature since 1994
  • All other sites except Katoomba had minimum temperatures below their September average
  • Four long-term sites, including Observatory Hill, had their lowest September mean temperature since at least 1997

Sydney (Observatory Hill)

  • Total rainfall for Sydney (Observatory Hill) was 51.0 mm, which is 75% of the long-term average of 67.8 mm
  • The mean daily maximum temperature for Sydney (Observatory Hill) was 20.9 °C, which is 0.8 °C above the long-term average of 20.1 °C. The warmest day was 31.8 °C on the 15th, and the coolest day was on the 8th when the temperature reached 15.4 °C
  • The mean daily minimum temperature for Sydney (Observatory Hill) was 11.4 °C, which is 0.3 °C above the long-term average of 11.1 °C. The coldest morning was 7.8 °C on the 17th, and the warmest morning was on the 12th when the minimum temperature was 15.5 °C

The 2018 NRL Grand Final

  • The 2018 NRL Grand Final between the Sydney Roosters and Melbourne Storm was played at Sydney Olympic Park on the evening of 30 September
  • At 7.30pm at Sydney Olympic Park AWS (Archery Centre) it was 13.6 °C with 70 percent relative humidity
  • This was slightly cooler than for the 2017 NRL Grand Final, and significantly cooler than for the 2013-2016 NRL Grand Finals

Further information

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Extremes in September 2018
Hottest day 34.0 °C at Richmond RAAF on the 15th
Warmest days on average 23.3 °C at Penrith Lakes AWS
Coolest days on average 15.3 °C at Mount Boyce AWS
Coldest day 7.2 °C at Katoomba (Murri St) on the 3rd
Coldest night -1.1 °C at Mount Boyce AWS on the 16th
Coolest nights on average 5.2 °C at Mount Boyce AWS
Warmest nights on average 12.4 °C at Sydney Harbour (Wedding Cake West)
Warmest night 15.6 °C at Terrey Hills AWS on the 19th
Warmest on average overall 16.3 °C at Norah Head AWS
Coolest on average overall 10.2 °C at Katoomba (Murri St)
Wettest overall 94.4 mm at Bankstown Airport AWS
Driest overall 18.4 mm at Richmond RAAF
Wettest day 67.0 mm at Bankstown Airport AWS on the 8th
Strongest wind gust 93 km/h at Kurnell AWS on the 28th

Record lowest September daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Badgerys Creek AWS 13.5 on the 3rd 13.9 on the 4th in 2005 23 22.6



Record lowest September mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Canterbury Racecourse AWS 7.9 8.2 in 2017 21 9.4

Lowest September mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
September
Parramatta North (Masons Drive) 8.2 7.6 in 1994 9.4
Sydney (Observatory Hill) 11.4 10.8 in 1994 11.1
Sydney Airport AMO 11.0 9.9 in 1994 10.5



Record lowest September mean temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Canterbury Racecourse AWS 14.3 14.6 in 2015 21 15.7

Lowest September mean temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
September
Camden Airport AWS 14.1 13.9 in 1993* 14.4
Bankstown Airport AWS 14.9 14.4 in 1997 15.2
Parramatta North (Masons Drive) 15.0 14.7 in 1997 15.5
Sydney (Observatory Hill) 16.1 15.5 in 1997 15.6

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




Summary statistics for September 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
September
2018
Diff
from
average
Highest for
September
2018
Mean for
September
2018
Diff
from
average
Lowest for
September
2018
Total for
September
2018
Average
for
September
Rank of
September
2018
Fraction of
September
average
Badgerys Creek AWS 22.0 -0.6 32.6 15th 7.2 -0.5 1.8 21st 53.6 33.2 high 161%
Bankstown Airport AWS 22.1 +0.4 32.3 15th 7.8 -0.9 4.6 21st 94.4 43.9 high 215%
Camden Airport AWS 22.2 +0.2 32.2 15th 6.0 -0.8 1.3 17th 40.0 38.3 average 104%
Campbelltown (Mount Annan) 22.3 -0.1 32.2 15th 6.4 -1.0 2.1 21st 26.0 31.5 average 83%
Canterbury Racecourse AWS 20.8 -1.2 31.6 15th 7.9 -1.5 4.5 21st 76.4 46.0 high 166%
Cooranbong (Lake Macquarie AWS) 21.4 -1.4 32.7 15th 7.7 -0.3 2.5 21st 61.6 56.2 average 110%
Gosford AWS 20.7   32.1 15th 9.4   4.7 21st 58.2
Holsworthy (Defence) 21.3   32.2 15th 7.3   2.9 17th 41.8
Holsworthy Aerodrome AWS 21.3   32.1 15th 8.0   3.1 21st 37.8
Horsley Park Equestrian Centre AWS 22.0 -0.4 32.0 15th 8.5 -0.8 4.0 21st 54.0 35.1 high 154%
Katoomba (Murri St) 15.6 +1.0 23.2 15th 5.5 +0.1 0.3 16th 86.0 71.1 high 121%
Mangrove Mountain AWS 20.2 -0.4 30.7 15th 8.0 -1.2 2.4 17th 46.2 62.5 average 74%
Mount Boyce AWS 15.3 +0.6 22.7 15th 5.2 -0.2 -1.1 16th 66.4 53.5 average 124%
Norah Head AWS 20.4 -0.7 30.9 15th 12.3 -0.5 9.3 17th 48.6 61.3 average 79%
Parramatta North (Masons Drive) 21.8 +0.1 32.0 15th 8.2 -1.2 4.0 17th 31.0 51.1 average 61%
Penrith Lakes AWS 23.3 0.0 33.2 15th 8.6 -0.8 4.0 17th 27.8 30.5 average 91%
Richmond RAAF 23.2 +0.4 34.0 15th 7.0 -1.0 1.2 21st 18.4 43.2 low 43%
Springwood (Valley Heights) 20.7 -0.7 30.5 15th 8.6 -0.9 5.4 21st 38.6 54.4 average 71%
Sydney (Observatory Hill) 20.9 +0.8 31.8 15th 11.4 +0.3 7.8 17th 51.0 67.8 average 75%
Sydney Airport AMO 21.1 +0.4 33.3 15th 11.0 +0.5 7.4 17th 64.4 59.7 average 108%
Sydney Harbour (Wedding Cake West) 18.6 -1.2 31.3 15th 12.4 -1.0 9.5 17th
Sydney Olympic Park AWS (Archery Centre) 21.6   32.0 15th 8.6   4.2 17th 40.4
Terrey Hills AWS 19.7 -1.1 31.0 15th 9.9 -1.3 5.5 17th 42.6 57.1 average 75%

Daily maximum temperatures for September 2018
123456789101112131415161718192021222324252627282930
Badgerys Creek AWS20.316.113.518.416.620.821.815.422.423.125.130.623.528.832.618.620.027.129.118.422.325.122.516.618.916.322.430.821.020.4
Bankstown Airport AWS21.718.614.618.717.620.624.116.822.921.324.230.921.127.932.317.919.126.729.420.022.025.421.418.418.116.722.630.921.619.5
Camden Airport AWS20.316.714.918.216.820.723.116.522.623.525.230.324.328.232.218.020.227.229.019.322.824.722.417.919.617.622.630.820.820.9
Campbelltown (Mount Annan)20.217.114.118.117.320.923.416.822.223.225.130.123.727.932.219.320.126.828.818.722.525.122.017.919.719.122.931.221.420.8
Canterbury Racecourse AWS21.215.315.017.917.920.023.716.022.619.621.930.119.624.031.615.918.124.528.616.421.023.219.815.617.716.621.030.020.317.7
Cooranbong (Lake Macquarie AWS)21.617.316.117.117.921.220.516.723.320.522.429.820.525.532.717.018.926.429.217.620.324.222.216.017.616.620.730.223.919.2
Gosford AWS21.715.216.217.717.920.322.415.522.719.821.630.119.424.032.116.017.524.928.816.420.322.820.116.217.415.022.227.122.418.2
Holsworthy (Defence)20.914.413.716.615.920.023.414.922.422.424.530.920.527.932.216.620.427.229.615.822.824.619.615.717.415.422.831.220.518.6
Holsworthy Aerodrome AWS20.415.314.017.717.020.022.015.322.521.023.530.421.027.432.116.918.526.028.917.021.024.520.517.218.216.522.130.720.619.6
Horsley Park Equestrian Centre AWS21.116.414.418.816.721.822.715.222.622.625.030.422.628.332.018.219.626.829.117.522.225.622.517.918.916.622.630.121.319.8
Katoomba (Murri St)11.112.07.210.39.113.814.09.714.719.222.419.021.423.213.314.619.719.614.419.618.619.89.213.09.619.022.4
Mangrove Mountain AWS20.014.513.115.615.119.620.012.421.020.522.328.421.627.630.716.517.925.427.115.121.125.021.214.616.212.722.128.921.718.6
Mount Boyce AWS9.913.37.39.510.014.914.79.613.018.320.121.221.720.922.712.014.219.118.613.718.217.320.09.013.29.717.121.312.915.4
Norah Head AWS22.015.218.317.818.321.320.416.122.020.422.123.721.223.930.915.618.822.928.317.419.623.518.715.417.515.421.325.520.418.1
Parramatta North (Masons Drive)22.016.815.018.617.321.024.016.723.221.824.030.521.229.032.017.319.022.029.017.222.225.821.315.218.317.222.630.322.020.0
Penrith Lakes AWS21.717.615.320.118.021.523.816.124.224.526.832.125.130.233.219.521.428.629.720.323.726.724.416.520.617.624.231.623.121.9
Richmond RAAF22.017.415.920.117.521.524.015.424.223.726.731.425.330.034.019.221.128.029.619.023.527.024.116.220.717.824.432.623.421.5
Springwood (Valley Heights)19.114.712.716.715.018.022.015.821.221.724.229.222.128.130.517.118.026.127.017.021.025.920.713.617.315.321.029.220.919.0
Sydney (Observatory Hill)21.516.617.018.917.619.623.415.423.220.922.525.821.323.031.817.618.221.728.618.319.421.221.217.717.616.720.128.421.619.9
Sydney Airport AMO22.414.815.318.317.820.924.215.524.119.423.026.920.225.133.316.018.824.129.916.420.623.819.416.718.117.121.131.320.618.6
Sydney Harbour (Wedding Cake West)20.014.215.517.117.418.920.615.021.817.517.720.217.619.131.314.916.620.328.216.017.318.617.814.916.616.517.524.218.516.9
Sydney Olympic Park AWS (Archery Centre)21.915.815.118.717.320.924.315.623.421.523.630.820.326.332.017.318.827.129.216.821.324.121.016.618.316.722.231.021.318.8
Terrey Hills AWS20.514.114.716.415.818.821.513.921.518.720.329.119.623.331.015.217.424.328.014.919.722.419.614.216.814.519.728.919.617.3
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 2018
123456789101112131415161718192021222324252627282930
Badgerys Creek AWS8.17.36.37.96.15.910.412.16.09.910.47.59.310.35.77.33.14.55.65.51.84.45.310.87.910.23.95.611.65.3
Bankstown Airport AWS5.46.35.86.85.16.012.09.65.49.410.57.910.012.77.89.04.94.76.78.74.66.47.611.78.210.25.56.512.36.0
Camden Airport AWS5.84.72.16.73.45.011.012.06.07.010.85.98.79.14.36.41.32.44.34.51.53.34.311.07.59.93.04.89.83.5
Campbelltown (Mount Annan)7.55.02.36.64.76.09.111.24.69.010.06.68.59.64.93.22.43.05.07.92.13.89.210.65.19.63.54.812.93.3
Canterbury Racecourse AWS5.14.95.76.45.16.613.08.24.97.210.19.111.012.58.09.55.25.17.710.74.56.79.611.97.69.85.57.411.17.1
Cooranbong (Lake Macquarie AWS)6.86.25.610.79.85.813.013.66.16.25.46.611.414.97.010.03.06.68.42.53.35.412.710.56.23.74.813.64.9
Gosford AWS10.46.09.510.59.66.813.213.27.410.37.810.112.314.79.310.35.17.09.611.64.76.79.211.510.58.16.47.713.29.0
Holsworthy (Defence)8.16.73.07.45.36.810.410.66.710.39.39.29.410.38.46.82.95.08.28.13.15.38.210.06.04.26.212.43.9
Holsworthy Aerodrome AWS6.88.05.08.25.66.810.911.75.411.611.79.510.012.67.37.84.65.58.48.53.14.89.011.17.210.14.35.612.16.2
Horsley Park Equestrian Centre AWS7.57.08.28.77.46.312.211.84.912.210.311.09.911.68.78.14.75.711.49.24.05.58.710.88.510.25.77.111.27.9
Katoomba (Murri St)2.43.23.04.75.45.68.66.93.65.97.09.47.212.90.31.25.412.40.63.36.87.83.84.75.22.49.0
Mangrove Mountain AWS8.86.16.28.98.26.912.411.05.35.67.213.610.112.711.56.02.45.014.07.33.44.96.79.48.66.56.19.211.33.9
Mount Boyce AWS4.22.62.64.14.94.98.16.72.75.26.711.79.97.313.1-1.1-0.25.911.21.32.56.47.73.03.94.82.09.35.60.4
Norah Head AWS11.410.910.811.812.612.414.613.910.712.011.813.514.915.513.910.89.311.414.813.210.111.213.312.611.112.79.412.714.910.0
Parramatta North (Masons Drive)10.06.36.87.35.56.211.811.27.28.09.010.010.512.08.28.64.04.89.57.24.56.49.710.88.09.26.57.011.87.8
Penrith Lakes AWS7.35.410.210.39.08.611.013.06.09.610.78.610.812.17.58.44.05.27.76.14.56.67.411.610.511.17.27.811.97.7
Richmond RAAF9.83.510.09.78.18.510.812.43.35.77.77.39.411.55.45.21.63.15.43.71.24.44.711.59.79.66.15.311.44.4
Springwood (Valley Heights)9.86.68.18.58.19.010.210.96.310.510.111.19.911.712.16.55.65.711.86.05.47.89.19.08.99.46.07.211.06.6
Sydney (Observatory Hill)10.210.98.610.09.210.312.812.89.811.412.315.514.015.213.010.17.810.215.011.48.210.214.112.610.211.88.411.314.79.3
Sydney Airport AMO9.511.07.810.49.49.813.912.28.712.613.412.813.814.512.49.67.49.612.710.88.09.714.212.29.812.28.411.314.09.0
Sydney Harbour (Wedding Cake West)11.711.510.211.711.811.913.313.311.914.213.214.914.815.513.810.59.511.714.811.310.112.514.112.611.09.912.114.810.9
Sydney Olympic Park AWS (Archery Centre)6.86.36.67.75.97.613.212.06.57.99.79.910.613.09.09.74.25.99.39.05.17.09.612.29.210.87.88.211.46.0
Terrey Hills AWS8.59.67.39.39.910.112.411.37.812.110.213.811.912.914.47.95.57.815.69.76.38.111.88.78.59.76.510.813.16.9
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 2018
123456789101112131415161718192021222324252627282930
Abbotsbury (Fairfield (City Farm)) 3.0 1.0 - 5.0 - 2.0 4.0 37.0 - - - - - - - - - - - - - - - - - 9.0 1.0 - - -
Abbotsford (Blackwall Point Rd) 2.0 - 4.0 12.0 - 1.0 4.0 9.5 0.4 - - - - - - - - - - 3.0 - - - - - 4.0



Audley (Royal National Park) 4.0 5.0 - 11.0 1.0 - 3.0 12.0 - - - - - - - - - - - - - - - - - - - - - -
Avalon Beach (Avalon (Palmgrove Rd)) 4.6 - - 6.4 4.0 2.8 5.0 4.8 - - - - - - - - - - - 7.0 2.6 - - 3.4 11.2 6.6 17.2 - 1.0
Badgerys Creek AWS 2.8 - - 4.0 - 2.0 4.0 28.6 0.4 - - - - - - - - - - - - - - 0.6 - 8.2 2.8 - 0.2 -
Bankstown Airport AWS 1.8 1.6 0.4 12.8 0.2 1.0 4.6 67.0 1.0 0.2 - - - - 0.2 - - - - 0.4 - - - - - 3.0 0.2 - - -
Baulkham Hills Eucalyptus Ct 0.5 - - 2.5 - 3.0 4.5 10.5 - - - - - - - - - - - 0.5 - - - 0.5 - 8.0 9.0 - - -
Blackheath (Wombat Street) 7.0 - - 12.0 7.0 2.0 9.0 3.0 4.0 - - - - - - - - - - - - - - 2.0 1.0 8.0 5.0 - - -
Box Hill (McCall Gardens) - - - 1.0 1.0 3.0 5.0 - 3.0 - - - - - - - - - - - - - - 1.0 - 4.0 20.0 - 1.0 -
Bringelly (Maryland) 2.0 - - 8.0 1.0 1.0 3.0 8.0 1.0 - - - - - - - - - - - - - - - - 2.0 10.0 - - -
Camden Airport AWS 1.8 - - 6.8 0.2 0.8 3.0 13.2 0.2 - - - - - - - - - - 0.4 - - - - 0.2 2.8 10.6 - - -
Campbelltown (Kentlyn (Georges River Roa 2.0 - - 5.0 1.0 - 4.0 5.0 1.0 - - - - - - - - - - - - - - - - 1.0 - - 1.0 -
Campbelltown (Mount Annan) 1.2 - - 6.0 1.4 0.4 3.0 9.2 0.4 0.2 - - - - - - - - - 0.2 - - - - - 3.2 0.8 - - -
Canterbury Racecourse AWS 3.4 4.6 - 8.2 1.8 0.8 3.6 40.6 0.4 - - - - - - - - - - 2.0 - - - - 0.4 3.6 5.0 - 2.0 -
Castle Cove (Rosebridge Ave) 2.0 0.2 2.5 13.0 0.5 5.0 4.0 8.5 2.0 - - - - - - - - - - 8.0 - - - 1.5 1.0 6.0 7.5 - 1.0
Castle Hill (Kathleen Ave) - 0.2 - - 5.0 7.8 5.4 2.2 8.0 - - - - - - - - - - 1.4 - - - 1.7 - 10.5 13.0


Chatswood Bowling Club 2.0 1.0 1.0 10.0 1.0 1.0 3.0 6.0 1.0 - - - - - - - - - - 7.0 - - - - - 9.0 2.0 - - -
Collaroy (Long Reef Golf Club) 1.0 - 3.6 4.2 - 1.8 3.8 1.6 1.2 - - - - - - - - - - 9.0 2.4 - - 1.2 4.8 4.6



Colo Heights (Mountain Pines) 2.2 0.1 - 11.6 1.4 2.4 6.4 1.2 0.2 - - - - - - - - - - - - - - 0.8 1.2 2.0 2.4 - 0.4
Concord (Brays Rd) 2.8 2.6 - 8.6 - 0.8 3.8 7.4 - - - - - - - - - - - 2.2 - - - - 0.2 6.4 2.4


Concord Golf Club 3.4 2.6 - 8.0 - 1.6 4.2 8.6 0.4 - - - - - - - - - - - 2.6 - - - - 6.6 1.8


Cooranbong (Avondale) 2.0 - - 23.0 16.0 - 6.0 5.0 - - - - - - 1.0 - - - - - - - - 4.0 5.0 - 2.0 1.0 - -
Cooranbong (Lake Macquarie AWS) 2.0 - - 21.0 15.8 0.2 5.8 5.0 - 0.2 - - - - - - - - - - - - - 3.6 5.4 - 2.0 0.2 0.4 -
Darkes Forest (Kintyre) 1.0 1.8 0.2 13.4 1.2 - 2.2 18.4 0.8 0.2 - - - - - - - - - - - - - 2.4 - 0.2 - - - -
Dover Heights (Portland St) 2.0 13.0 - 10.6 0.6 2.6 4.8 7.6 0.2 - - - - - - - - - - 24.8 3.0 - - 1.4 4.8 4.2 0.6 1.0

Erskine Park Reservoir - - - 4.0 - 5.0 5.0 4.0 - - - - - - - - - - - - - - - - - 10.0 6.0 - - -
Faulconbridge (Great Western Hwy) 3.0 - 1.0 6.0 - 2.0 5.0 2.0 1.0 - - - - - - - - - - - - - - - 2.0 8.0 3.0 - 1.0 -
Faulconbridge (St Georges Crescent) 4.0 - 1.0 5.2 0.8 2.4 5.4 3.0 1.2 0.2 - - - - - - - - - - - - - 0.6 1.8 8.2 2.8


Gears (Wyong River)
- - 16.0 10.0 2.0 3.0 - - - - - - - - - - - - - - - - - - 1.0 1.0 - - -
Gosford AWS 0.8 - 1.2 27.0 2.6 0.4 4.4 1.8 0.2 - - - - - - - - - - 3.6 0.4 - - 1.6 2.4 0.6 11.2 - - -
Holsworthy (Defence) 4.6 - - 11.6 1.0 0.2 6.4 15.6 0.6 - - - - - - - - - - 1.2 - - - - -
0.4 - 0.2 -
Holsworthy Aerodrome AWS 2.4 1.6 - 6.8 0.4 - 4.6 17.0 0.8 - - - - - - - - - - 0.6 - - - - - 3.4 - - 0.2 -
Hornsby (Swimming Pool) 0.4 0.4 0.4 7.2 - 1.0 4.8 0.2 5.0 - - - - - - - - - - 1.4 - - - 0.4 - 7.0 21.2 - 0.8 -
Horsley Park Equestrian Centre AWS 2.2 - 0.6 5.8 - 3.0 4.2 27.8 0.6 - 0.2 - - - - - - - - 0.4 0.2 - - - - 8.0 0.6 0.2 0.2 -
Katoomba (Murri St) 5.8 - 0.2 27.0 6.2 3.2 6.2 16.0 3.0 - - - - - - - - - - - - - - 4.4 0.8 7.2 6.0 - - -
Kurrajong Heights (Bells Line of Road) 3.2 - - 8.6 4.0 5.6 3.4 1.8 0.5 - - - - - - - - - - - - - - 2.5 2.4 3.6 7.0


Lucas Heights (ANSTO) 2.8 4.2 - - - - 3.8 6.9 1.0 - - - - - - - - - - 5.4 - - - - - 4.6

0.5 -
Mangrove Mountain AWS 1.6 - - 13.4 5.2 6.2 5.2 4.4 0.8 - - - - - - - - - - - - - - 0.8 2.6 - 5.4 - 0.6 -
Marrickville Golf Club 2.0 4.0 - 8.0 1.0 1.0 4.0 46.0 1.0 - - - - - - - - - - 5.0 - - - - - 4.0 1.0 - 3.0 -
Menangle Bridge (Nepean River) 1.0 - - 5.0 1.0 - 3.0 34.0 2.0 - - - - - - - - - - - - - - - - 3.0 1.0 - - -
Milperra Bridge (Georges River) 1.0 1.0 - 9.0 - - 4.0 52.0 1.0 - - - - - - - - - - - - - - - - 1.0 - - - -
Mona Vale Golf Club 0.6 4.6 0.6 9.0 0.8 3.4 5.6 3.4 0.4 - 0.4 - - - 0.4 - - - - 4.8 1.4 0.2 - 2.4 3.8 6.6 13.8 0.2 0.2 -
Mount Boyce AWS 7.2 - - 16.8 8.2 2.0 9.6 2.6 6.0 - 0.2 - - - - - - - - - - - - 1.8 1.0 6.0 4.8 - 0.2 -
Mount Wilson (Clarine) 9.6 - 6.0 16.0 11.0 3.0 7.4 4.0 2.0 - - - - - - - - - - - - - - 1.8 2.0 4.4 4.4 - - -
Norah Head AWS 0.8 0.2 0.2 11.2 9.0 3.6 4.8 2.8 - - - 0.2 0.2 - 0.2 - 0.2 - - - - - - 1.2 11.4 - 2.4 0.2 - -
North Parramatta (Burnside Homes) 0.5 0.5 - 5.0 - 1.0 4.0 8.5 - 0.5 - - - - - - - - - - - - - 0.5 - 7.5 3.0 - - -
North Rocks (Muirfield Golf Club) 0.5 - 0.5 5.0 - 1.5 4.0 9.0 1.0 - - - - - - - - - - - 0.5 - - 1.0 0.5 9.0 5.0 - 0.5 -
North Ryde Golf Club 1.0 1.0 - 6.0 - 2.0 4.0 12.0 - - - - - - - - - - - 2.0 - - - - - 9.0 2.0 - - -
Parramatta North (Masons Drive) 1.2 0.2 1.2 5.0 - 1.2 1.6 7.2 0.6 - - - - - - - - - - 0.4 - - - 1.0 0.2 8.0 3.0 - 0.2 -
Peakhurst Golf Club 3.0 4.0 - 8.0 1.0 - 4.0 25.0 1.0 - - - - - - - - - - 1.0 - - - - - 2.0 1.0 - - -
Penrith Lakes AWS 0.2 - 0.2 1.6 0.2 0.6 2.6 - 0.6 0.2 - - - - - - - - - - - - - 0.4 - 9.8 10.0 0.4 1.0 -
Picton Council Depot 2.0 9.2 0.6 3.0 3.2 6.4 - - - - - - - - - - - - - - - 0.4 5.4 0.2

Prospect Reservoir


5.0 - 3.0 6.0 7.0 - - - - - - - - - - - - - - - - - 6.0 2.0 - 1.0 -
Putty (The Gibba) 3.0 - - 8.0 4.0 - 11.0 1.0 - - - - - - - - - - - - - - - 1.0 - 1.0 2.0 - - -
Randwick (Randwick St) 3.6 4.6 0.2 9.4 - 1.0 5.4 30.4 0.6 - - - - - - - - - - 10.4 0.8 - - 0.4 1.4 5.2 0.8 - 1.8
Richmond RAAF 0.2 - - 2.6 - 3.4 2.6 0.2 1.4 - - - - - - - - - - - - - - 0.8 - 3.2 3.6 0.2 0.2 -
Rose Bay (Royal Sydney Golf Club) 2.0 5.0 - 9.2 0.2 1.4 4.4 10.4 - - - - - - - - - - - 13.6 1.4 - - 0.4 3.0 4.0 0.4 -

Rossmore (South Creek) 3.0 - - 4.0 - 1.0 3.0 31.0 - - - - - - - - - - - - - - - - - 2.0 1.0 - - -
Sans Souci (Public School) 2.0 2.0 - 12.0 1.0 3.0 3.0 14.0 1.0 - - - - - - - - - - 3.0 - - - - - 7.0 - - - -
Seven Hills (Radio FM 103.2) - 1.0 - 2.0 0.5 3.5 4.0 14.5 - - - - - - - - - - - 0.5 - - - - - 7.0 5.5 - 0.5 -
Seven Hills (Collins St)


4.0
4.2 5.0 11.4
















8.4 15.0


Shanes Park (South Creek Road) 0.2 - - 2.8 - 3.2 5.6 19.8 1.2 - - - - - - - - - - 0.2 0.2 - - 0.4 - 8.0 5.0 - 0.6 -
Springwood (Valley Heights) 2.0 - 0.6 4.8 - 1.8 4.0 1.2 0.8 - - - - - - - - - - - - - - 1.4 0.8 9.0 11.0 - 1.2 -
St Ives (Richmond Avenue) 0.8 0.4 0.6 9.8 0.8 1.0 4.4 1.0 4.6 - - - - - - - - - - 2.2 0.4 - - 3.2 1.0 8.2 9.4


Sydney (Observatory Hill) 2.2 0.2 0.2 11.2 - 0.8 4.0 20.0 - 0.2 - - - - - - - - - 5.6 - - - 0.4 0.8 3.6 1.0 - 0.8 -
Sydney Airport AMO 2.8 1.8 0.8 7.8 1.0 0.2 3.8 30.4 0.6 0.2 - - - - 0.2 - - - - 7.8 0.4 - - - - 3.8 0.4 0.2 2.2 -
Sydney Botanic Gardens 3.2 0.4 0.4 10.8 - 0.8 4.8 20.0 0.3 - - - - - - - - - - 7.2 - - - 0.4





Sydney Olympic Park AWS (Archery Centre) 2.6 2.4 - 7.6 - 1.6 4.6 8.2 0.2 - - 0.2 - - - - - - - 1.6 - - - - 0.2 9.2 2.0 - - -
Terrey Hills AWS 0.2 0.2 - 10.2 2.2 1.6 4.0 - 1.8 - - - - - - - - - - 2.4 0.4 - - 5.0 1.0 5.6 7.8 0.2 - -
Wahroonga (Ada Avenue) 0.6 0.6 0.6 9.0 0.6 3.2 5.0 0.4 3.8 - - - - - - - - - - 2.8 - - - 0.6 0.2 8.2 7.0 0.2 0.8 -
Warragamba 4.0 - - 7.0 - 2.0 2.0 19.0 - - - - - - - - - - - - - - - - - 7.0 2.0 - - -
Wedderburn (Booalbyn) 2.0 - - 5.0 - - 3.0 11.0 2.0 - - - - - - - - - - - - - - - - 1.0 3.0 - - -
Wyong (Kulnura (Jeavons)) 2.0 - - 14.0 6.0 3.0 6.0 - - - - - - - - - - - - - - - - - 3.0 - 1.0 - - -
Wyong (Olney Forest) 1.0 - - 43.0 11.0 5.0 6.0 1.0 - - - - - - - - - - - - - - - 1.0 4.0 - 1.0 - - -
Yarramalong (Lewensbrook) 2.0 - - 20.0 10.0 13.0 5.0 - 0.6 - - - - - - - - - - - - - - - 3.6 - 2.8 - - -
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.

This summary includes 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 11 am on Monday 1 October 2018. 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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