Greater Sydney in August 2018: Warm days, generally dry

Greater Sydney recorded below average rainfall during August, with generally warmer than average daytime temperatures. Nights were generally cooler than average

Low rainfall

  • Dry conditions were experienced across the region, with most sites recording less than 20% of their typical August totals
  • Rainfall was recorded across most of Greater Sydney only during the first seven days and last eight days of the month
  • A few sites recorded their lowest total August rainfall for at least 20 years

Average to above average daytime temperatures; below average to average nights

  • Most sites reported average to above average maximum temperatures
  • Nights were generally below average to average; only Sydney (Observatory Hill) and Sydney Airport AMO recorded above monthly minimum temperatures at least 0.5 °C above average
  • The warmest days were generally between 10 and 15 August, with the coldest day across most sites occurring on the 27th or 28th
  • Many sites recorded their warmest night on either the 16th or 27th August, with the coldest night occurring mostly on the 29th or 30th
  • Mangrove Mountain AWS recorded its lowest daily August temperature on record

Sydney (Observatory Hill)

  • August rainfall for Sydney (Observatory Hill) was 7.8 mm, which is 10% of the long-term average of 80.3 mm
  • It was the driest August since 2009
  • The mean daily maximum temperature for Sydney (Observatory Hill) was 19.2 °C, which is 1.3 °C above the long-term average of 17.9 °C. The warmest day was 25.6 °C on the 11th, and the coolest day was on the 27th when the temperature reached 14.5 °C
  • The mean daily minimum temperature for Sydney (Observatory Hill) was 9.5 °C, which is 0.5 °C above the long-term average of 9.0 °C. The coldest morning was 5.2 °C on the 29th, and the warmest morning was on the 16th when the minimum temperature was 14.6 °C

Further information

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Extremes in August 2018
Hottest day 26.7 °C at Camden Airport AWS on the 11th
Warmest days on average 20.3 °C at Richmond RAAF
Coolest days on average 11.2 °C at Mount Boyce AWS
Coldest day 4.7 °C at Mount Boyce AWS on the 19th
Coldest night -2.3 °C at Mount Boyce AWS on the 20th
Coolest nights on average 2.4 °C at Mount Boyce AWS
Warmest nights on average 10.8 °C at Sydney Harbour (Wedding Cake West)
Warmest night 14.8 °C at Sydney Harbour (Wedding Cake West) on the 16th
Warmest on average overall 14.6 °C at Norah Head AWS
Coolest on average overall 6.8 °C at Mount Boyce AWS
Wettest overall 30.0 mm at Mount Boyce AWS
Driest overall 2.2 mm at Mangrove Mountain AWS
Wettest day 14.8 mm at Gosford AWS on the 26th
Strongest wind gust 89 km/h at Sydney Airport AMO on the 18th

Record lowest August total rainfall
New record
(mm)
Old
record
Years of
record
Average for
August
Avalon Beach (Avalon (Palmgrove Rd)) 2.0 = 2.0 in 2005 40 83.1
St Ives (Richmond Avenue) 5.2 5.4 in 2009 20 80.6

Lowest August total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Average for
August
Mangrove Mountain AWS 2.2 1.2 in 1995* 55.4

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




Record lowest August temperature
New record
(°C)
Old
record
Years of
record
Average for
August
Mangrove Mountain AWS -0.8 on the 30th -0.5 on the 13th in 2005 25 6.6



Summary statistics for August 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
August
2018
Diff
from
average
Highest for
August
2018
Mean for
August
2018
Diff
from
average
Lowest for
August
2018
Total for
August
2018
Average
for
August
Rank of
August
2018
Fraction of
August
average
Badgerys Creek AWS 19.2 0.0 26.5 11th 4.3 -0.4 -1.0 29th 6.0 35.4 low 17%
Bankstown Airport AWS 19.6 +0.6 26.3 11th 5.1 -0.9 0.7 18th 8.8 49.5 low 18%
Camden Airport AWS 19.2 +0.1 26.7 11th 3.6 -0.3 -2.2 18th 6.4 40.7 low 16%
Campbelltown (Mount Annan) 19.1 -0.1 26.3 11th 3.7 -0.9 -1.7 18th 4.0 38.8 v low 10%
Canterbury Racecourse AWS 18.9 -0.1 25.5 11th 5.3 -1.2 1.4 18th 5.8 62.2 v low 9%
Cooranbong (Lake Macquarie AWS) 19.8 0.0 25.1 15th 3.8 -1.2 -1.1 30th 7.0 40.4 low 17%
Gosford AWS 19.0   24.7 15th 6.4   1.9 30th 17.6
Holsworthy (Defence) 18.7   26.0 11th 5.7   0.4 29th 17.0
Holsworthy Aerodrome AWS 18.7   25.8 11th 5.7   0.4 29th 10.6
Horsley Park Equestrian Centre AWS 19.0 0.0 25.6 11th 5.5 -1.0 1.0 29th 4.8 37.6 low 13%
Katoomba (Murri St) 12.2 +1.0 19.2 14th 3.4 +0.1 -1.4 20th 26.4 78.7 low 34%
Mangrove Mountain AWS 18.1 +0.7 23.1 11th 5.7 -0.9 -0.8 30th 2.2 55.4 v low 4%
Mount Boyce AWS 11.2 -0.1 17.3 10th 2.4 -0.6 -2.3 20th 30.0 54.7 average 55%
Norah Head AWS 19.2 +0.4 24.2 15th 9.9 -0.6 6.5 13th 14.2 67.3 low 21%
Parramatta North (Masons Drive) 19.2 +0.1 25.6 11th 6.9 -0.2 1.0 30th 8.2 55.3 low 15%
Penrith Lakes AWS 20.2 +0.3 26.4 11th 5.4 -0.8 0.8 29th 4.6 29.3 low 16%
Richmond RAAF 20.3 +0.6 26.6 11th 3.9 -0.5 -1.8 29th 3.8 32.0 low 12%
Springwood (Valley Heights) 17.6 -0.3 24.2 11th 7.1 0.0 2.6 29th 6.4 53.0 low 12%
Sydney (Observatory Hill Comparison) 19.3   25.0 11th 9.3   5.1 29th 8.6
Sydney (Observatory Hill) 19.2 +1.3 25.6 11th 9.5 +0.5 5.2 29th 7.8 80.3 low 10%
Sydney Airport AMO 19.3 +0.9 26.6 11th 8.9 +0.7 4.6 29th 4.6 76.0 v low 6%
Sydney Harbour (Wedding Cake West) 17.4 -0.5 24.9 15th 10.8 -0.4 6.7 29th
Sydney Olympic Park AWS (Archery Centre) 19.3   25.5 11th 5.9   2.2 29th 8.0
Terrey Hills AWS 17.8 0.0 23.9 15th 8.2 -0.2 2.7 29th 2.6 51.2 v low 5%

Daily maximum temperatures for August 2018
12345678910111213141516171819202122232425262728293031
Badgerys Creek AWS21.219.023.818.620.819.117.019.420.224.126.516.019.122.525.321.318.922.316.116.417.018.116.918.517.616.713.315.517.718.917.2
Bankstown Airport AWS21.119.823.419.821.718.817.419.720.223.526.316.519.923.125.821.319.023.216.416.517.417.920.318.716.715.915.517.018.217.7
Camden Airport AWS20.619.123.818.820.619.117.119.320.323.426.715.718.723.825.220.118.622.115.316.616.817.717.219.217.716.814.016.317.819.017.2
Campbelltown (Mount Annan)20.318.923.618.720.418.316.219.420.323.026.315.918.523.725.120.118.921.815.216.716.718.316.619.218.417.013.316.217.919.517.1
Canterbury Racecourse AWS20.719.022.919.620.618.717.219.219.022.925.516.619.722.225.221.117.722.316.215.116.916.717.017.518.918.013.714.715.816.717.1
Cooranbong (Lake Macquarie AWS)21.818.623.320.421.419.318.020.119.222.224.317.720.421.525.122.619.323.117.416.519.018.217.919.221.317.015.417.418.118.4
Gosford AWS21.218.223.119.921.218.417.719.618.423.124.316.819.720.424.722.618.622.517.214.618.117.116.318.420.316.214.014.615.817.117.6
Holsworthy (Defence)20.519.422.818.320.617.915.919.420.223.126.015.618.823.525.520.218.722.115.116.016.317.316.517.017.317.212.614.816.318.416.3
Holsworthy Aerodrome AWS20.219.023.318.820.818.416.219.119.423.025.815.718.822.425.120.118.522.115.216.016.117.617.017.317.716.413.814.816.717.616.9
Horsley Park Equestrian Centre AWS21.019.023.119.021.218.216.519.019.723.025.616.219.422.524.821.218.521.816.016.417.018.417.418.117.416.413.415.717.518.917.3
Katoomba (Murri St)13.116.012.616.39.37.010.414.718.017.48.211.619.216.213.611.013.46.010.67.312.68.813.012.19.08.99.212.915.912.6
Mangrove Mountain AWS19.717.321.618.720.416.615.718.319.421.623.115.818.821.723.022.317.420.815.315.116.915.915.117.518.716.113.015.315.817.817.3
Mount Boyce AWS10.713.516.210.915.78.66.49.012.917.316.16.28.817.014.911.59.311.64.78.45.611.210.113.310.58.310.19.311.314.712.0
Norah Head AWS20.719.420.120.222.318.618.120.319.121.223.116.420.222.224.220.718.222.217.213.918.916.518.719.222.116.414.615.517.517.8
Parramatta North (Masons Drive)21.218.718.821.519.217.219.620.323.325.616.819.723.225.521.619.022.716.817.017.318.017.718.018.216.813.515.517.217.818.7
Penrith Lakes AWS22.219.524.119.922.420.117.520.620.825.126.417.621.323.625.723.319.723.517.617.518.119.719.120.417.516.213.716.618.819.719.0
Richmond RAAF22.319.724.321.223.420.218.020.520.524.626.617.821.323.626.223.619.823.717.217.018.719.618.820.116.515.414.016.318.019.619.4
Springwood (Valley Heights)20.017.521.917.119.016.915.217.218.222.524.215.319.020.723.020.617.420.414.016.415.617.015.917.215.014.412.314.015.816.916.2
Sydney (Observatory Hill Comparison)21.118.822.920.520.518.617.019.120.022.525.017.420.421.624.822.219.422.216.715.517.818.019.517.219.016.614.515.617.618.117.1
Sydney (Observatory Hill)21.817.523.420.319.219.017.119.519.522.125.617.120.321.725.122.618.722.516.416.217.617.818.216.818.516.814.515.817.518.016.7
Sydney Airport AMO21.419.023.420.720.919.718.220.518.323.126.617.221.022.926.320.817.323.616.614.118.116.217.617.720.018.813.813.914.916.818.0
Sydney Harbour (Wedding Cake West)19.717.419.518.817.618.816.118.617.917.724.115.017.919.224.919.516.121.414.713.916.015.315.916.717.015.714.013.014.115.317.4
Sydney Olympic Park AWS (Archery Centre)21.018.223.420.420.419.017.219.620.523.425.516.519.723.425.021.419.222.617.416.617.717.416.917.818.616.914.115.916.818.317.6
Terrey Hills AWS19.516.521.318.819.917.615.718.317.621.123.515.018.621.023.920.617.221.315.314.616.816.016.916.617.516.012.713.715.016.416.0
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 August 2018
12345678910111213141516171819202122232425262728293031
Badgerys Creek AWS2.25.11.86.30.53.110.02.11.50.60.86.26.23.01.89.00.2-0.38.95.84.95.87.18.57.06.69.86.3-1.00.24.4
Bankstown Airport AWS2.65.34.17.51.64.110.01.92.83.02.86.37.84.84.26.31.40.78.15.15.06.64.88.07.37.711.27.61.11.75.6
Camden Airport AWS1.13.01.96.6-0.61.68.30.30.2-0.8-0.35.97.03.0-0.15.4-0.9-2.28.16.97.09.84.18.36.25.49.77.2-1.7-2.14.1
Campbelltown (Mount Annan)2.53.92.07.20.93.65.41.62.10.52.23.41.73.92.08.2-0.7-1.78.55.82.97.94.16.66.65.79.15.6-0.70.74.6
Canterbury Racecourse AWS3.84.74.68.11.95.710.32.32.84.110.56.76.34.85.37.02.31.45.26.83.54.73.07.66.78.010.57.91.42.05.1
Cooranbong (Lake Macquarie AWS)2.53.81.96.31.03.07.7-1.01.50.10.58.82.21.14.86.92.6-0.76.08.71.54.54.34.68.08.49.76.1-0.7-1.14.0
Gosford AWS7.84.96.09.34.79.47.92.45.13.65.310.04.84.38.28.63.52.59.49.04.34.95.09.610.29.59.99.12.41.96.2
Holsworthy (Defence)5.55.67.48.63.56.06.44.06.73.34.66.27.08.96.27.75.22.07.64.35.18.52.77.37.17.010.35.30.41.65.3
Holsworthy Aerodrome AWS6.25.44.810.11.95.79.83.03.72.44.66.56.35.96.88.73.42.88.55.85.48.14.57.48.27.410.66.80.41.75.2
Horsley Park Equestrian Centre AWS7.46.54.36.31.98.96.74.23.72.97.05.22.62.37.010.22.33.64.06.83.55.18.26.98.97.910.97.41.01.15.9
Katoomba (Murri St)3.32.05.15.62.02.34.64.68.11.41.33.86.16.91.44.30.8-1.41.42.84.13.67.06.75.60.1-0.81.04.3
Mangrove Mountain AWS7.92.75.86.85.310.58.65.04.710.56.02.53.19.312.02.86.93.72.83.02.75.511.27.98.33.9-0.3-0.8
Mount Boyce AWS4.61.24.52.83.44.51.31.82.73.67.30.2-0.11.64.16.3-0.22.9-0.2-2.30.52.62.22.36.35.64.50.1-1.50.52.5
Norah Head AWS10.39.810.911.29.312.310.57.69.98.913.19.76.58.511.612.98.77.810.08.76.98.69.212.214.212.312.29.26.56.611.6
Parramatta North (Masons Drive)8.05.75.08.48.27.010.37.25.03.010.37.45.05.77.411.35.37.59.06.25.25.85.28.28.07.810.27.26.01.05.2
Penrith Lakes AWS5.05.13.76.22.24.89.32.33.42.63.28.62.01.63.514.32.72.09.47.83.73.18.610.28.98.110.77.40.80.96.0
Richmond RAAF4.52.42.27.9-0.33.79.20.10.4-0.51.97.8-0.2-0.96.09.30.40.19.34.63.30.46.410.15.87.410.37.3-1.8-1.74.7
Springwood (Valley Heights)9.06.56.48.16.08.18.96.16.45.28.26.55.54.910.613.64.56.76.75.66.09.87.88.19.68.78.94.82.63.07.0
Sydney (Observatory Hill Comparison)11.38.89.011.26.811.411.48.58.87.410.99.98.39.011.514.37.69.19.17.77.89.17.410.810.610.712.28.45.15.69.2
Sydney (Observatory Hill)11.58.99.611.17.210.711.28.59.77.810.29.98.59.411.814.68.19.19.47.98.39.77.511.010.710.812.38.65.25.89.6
Sydney Airport AMO9.29.19.411.36.911.910.98.08.27.612.09.48.19.69.610.87.25.88.77.57.69.46.910.310.710.512.38.24.65.69.0
Sydney Harbour (Wedding Cake West)11.810.611.712.69.111.712.49.611.79.211.510.810.411.112.614.811.010.410.69.09.611.610.111.612.712.012.39.36.77.59.5
Sydney Olympic Park AWS (Archery Centre)6.45.55.77.12.86.88.73.44.74.29.16.65.64.55.97.74.34.05.76.73.66.05.18.07.88.511.07.32.22.36.4
Terrey Hills AWS10.17.58.98.76.812.79.26.67.38.612.08.34.65.711.513.36.27.67.36.34.87.56.78.912.09.710.77.22.73.99.5
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 August 2018
12345678910111213141516171819202122232425262728293031
Abbotsbury (Fairfield (City Farm)) - - - - - - 1.0 - - - - - - - - - - - - - - - - - - 1.0 2.0 - - - -
Abbotsford (Blackwall Point Rd) - - - - - - - - - - - - - - - - - - - - - - - 1.0 - 3.0 - - - -
Audley (Royal National Park) - - - - - - 1.0 - - - - - - - - - - - - - - - - 2.0 - - 4.0 - - - -
Avalon Beach (Avalon (Palmgrove Rd)) - - - - - - - - - - - - - - - - - - - - - - - 1.8 0.2





Badgerys Creek AWS - - - - - - 0.4 - - - - - - - - - - - - - - - - 1.0 - 1.4 3.2 - - - -
Bankstown Airport AWS - - - - - 0.2 1.8 - - - - - - - - - - - - - 0.2 - - 4.4 0.2 0.4 1.6 - - - -
Baulkham Hills Eucalyptus Ct - - - - - 0.5 1.5 - - - - - - - - 0.5 - - - - - - - 0.5 - - 2.0 - - - -
Belrose (Evelyn Place) - - - 0.2 - - 0.4 - - - - - - - - - - - - - - - - 1.4 3.2 - 1.0 - - - -
Bilpin Post Office - - - 2.2 1.2 1.8























Blackheath (Wombat Street) - - - 4.0 - 4.0 2.0 - - - - - - - - - - - 1.0 - - - - - - 4.0 11.0 1.0 1.0 - -
Box Hill (McCall Gardens) - - - - - - 2.0 - - - - - - - - - - - - - - - - - - - 2.0 - - - -
Bringelly (Maryland) - - - - - - - - - - - - - - - - - - - - - - - 2.0 1.0 - 2.0 - - - -
Camden Airport AWS - - - - - - 0.6 - - - - - - - - - - - - - - - - 2.2 0.2 1.4 2.0 - - - -
Campbelltown (Kentlyn (Georges River Roa - - - - - 1.0 - - - - - - - - - - - - - - - - - 6.0 - 1.0 1.0 - - - -
Campbelltown (Mount Annan) - - - - - - 1.0 - - - - - - - - - - - - - - - - 0.6 - 0.4 1.6 0.2 0.2 - -
Canterbury Racecourse AWS - - - - - - 2.2 - - - - - - - - - - - - - - - - 1.6 0.6 0.2 1.2 - - - -
Castle Cove (Rosebridge Ave) - - - - - - - - - - - - - - - - - - - - - - - 2.0 3.5 - 2.5 1.0 - - -
Castle Hill (Kathleen Ave) - - - - - - - - - - - - - - - - - - - - - - - - 0.2 6.7 1.8



Chatswood Bowling Club - - - - - - 1.0 - - - - - - - - - - - - - - - - 1.0 1.0 - 2.0 - - - -
Collaroy (Long Reef Golf Club) - - - - - - - - - - - - - - - - - - - - - - - 7.2 3.0 - 2.8 - - - -
Colo Heights (Mountain Pines) - - 0.1 1.2 - 0.4 0.8 - - - - - - - - - - - - - - - - - - 8.0 1.0 - 2.0

Concord (Brays Rd) - - - - - - 2.4 - - - - - - - - - - - - - - - - 1.8 1.2 0.2 1.2 - - - -
Concord Golf Club - - - - - 2.4 - - - - - - - - - - - - - - - - - 2.8 1.2 - 1.2 - - - -
Cooranbong (Avondale) - - - - - 2.0 6.0 - - - - - - - - - - - - - - - - - - 2.0 - - - - -
Cooranbong (Lake Macquarie AWS) - - - 0.2 - 0.2 3.8 - - - - - - - - - - - - - - - - 0.8 - 0.2 1.6 0.2 - - -
Darkes Forest (Kintyre) - - - 0.2 - 0.2 2.4 - - - - - - - - - - - 0.4 - - - - 3.2 5.2 0.2 4.0 - - - -
Dover Heights (Portland St) - - - - - - 1.2 - - - - - - - - - - - - - - - - 7.0 1.2 0.1 2.8 0.4 - - -
Erskine Park Reservoir - - - - - 1.0 - - - - - - - - - - - - - - - - - - - 1.0 2.0 - - - -
Faulconbridge (Great Western Hwy) - - - - - - 1.0 - - - - - - - - - - - - - - - - - - 2.0 6.0 1.0 - - -
Faulconbridge (St Georges Crescent) - - - 1.2 - 0.2 0.6 - - - - - - - - - - - 0.2 - - - - - 0.2 1.6 5.2 1.4 - - -
Gears (Wyong River) - - - - - -
-

- -



- - - - - - - - - - - - - - -
Gosford AWS - - - - - - - - - - - - - - - - - - - - - - - 1.0 - 14.8 1.8
- - -
Holsworthy (Defence) - - - - - - 2.4 - - - - - - - - - - - - - - - - 9.4 2.8 0.6 1.8 - - - -
Holsworthy Aerodrome AWS - - - - - 0.2 2.2 - - - - - - - - - - - - - - - - 4.4 0.4 1.8 1.6 - - - -
Hornsby (Swimming Pool) - - - - - - 3.2 - - - - - - - - - - - - - - - - 3.8 0.6 0.2 1.6 - - - -
Horsley Park Equestrian Centre AWS - - - - - 0.2 0.8 - - - - - - - - - - - - - - - - 0.6 - 0.6 2.6 - - - -
Katoomba (Murri St) - - 4.8 - 3.4 2.8 - - - - 0.4 - - - - - - 1.0 - - - - - 0.4 4.6 7.6 1.4 - - -
Kurrajong Heights (Bells Line of Road) - - - - 1.2 1.2 - - - - - - - - - - - - - - - - - - 2.2 4.0 0.8 - - -
Lucas Heights (ANSTO) - - - - - - - - - - - - - - - - - - - - - - - 1.8 - 1.0 1.4 - - - -
Mangrove Mountain AWS - - - 0.2 - - 0.6 - - - - - - - - -

- - - - - - - 0.2 1.2 - - -
Marrickville Golf Club - - - - - - 2.0 - - - - - - - - - - - - - - - 1.0 1.0 1.0 - 1.0 - - - -
Menangle Bridge (Nepean River) - - - - - - - - - - - - - - - - - - - - - - - - - 1.0 2.0 - - - -
Milperra Bridge (Georges River) - - - - - - 1.0 - - - - - - - - - - - - - - - - 3.0 - - 1.0 - - - -
Mona Vale Golf Club - - 0.2 - - - - - - 0.2 - - - - - - - - - - - - - 2.0 - 0.2 1.2 - - - -
Mount Annan (Australian Botanic Garden) - - - - - - 1.1 - - - - - - - - - - - - - - - - 0.8 0.3 0.5 2.4 - - - -
Mount Boyce AWS - - - 3.0 - 3.8 2.2 - - - - 0.2 - - - - - - 1.0 - - - - - - 4.8 11.8 3.0 0.2 - -
Mount Wilson (Clarine) - - - 4.0 - 2.6 3.6 - - - - - - - - - - - 0.6 - - - - - - 4.0 6.0 1.0 - - -
Norah Head AWS - 1.4 - - - - 2.0 - - - 0.2 - - - - - - - - - - - - 1.0 0.2 6.0 0.8 2.4 0.2 - -
North Parramatta (Burnside Homes) - - - - - - 2.0 - - - - - - - - - - - - - - - - 2.5 0.5 0.5 1.5 0.5 - - -
North Rocks (Muirfield Golf Club) 1.0 - - - - - 3.0 - - - - - - - - - - - - - - - - 2.5 - 0.5 2.5 0.5 - - -
North Ryde Golf Club - - - - - - 2.0 - - - - - - - - - - - - - - - - 2.0 2.0 - 2.0 - - - -
Parramatta North (Masons Drive) - - - 0.4 - 0.8 0.2 - - - - - - - - - - - - - - - - 3.2 0.2 1.0 2.2 0.2 - - -
Pennant Hills (Yarrara Road) - 0.2 - 2.8 - - - - - - - - - - - - - - - - 2.4 0.4 0.5 2.0 - - - -
Penrith Lakes AWS - - - 0.2 - 0.2 0.6 - - - - - - - - - - - - - - 0.2 - - - 1.2 2.2 - - - -
Picton Council Depot - - - - - - 0.4 - - - - - - - - - - 0.6 - - - 5.2 3.7 0.2 - - -
Putty (The Gibba) - - - - - - - - - - - - - - - - - - - - - - - - 1.0 10.0 - - - - -
Randwick (Randwick St) - - - - - - 1.8 - - - - - - - - - - - - - - - - 3.8 0.8 1.6 1.8 - - - -
Richmond - UWS Hawkesbury - - - - 0.4 0.6 - - - - - - - - - - - - - - - - - - 3.0 0.4 - - -
Richmond RAAF - - - - - 0.2 1.0 - - - - - - - - - - - - - - - - - - 1.2 1.0 0.4 - - -
Rose Bay (Royal Sydney Golf Club) - - - - - - 0.1 - - - - - - - - - - - - - - - - 5.0 - - 2.6 - - - -
Rossmore (South Creek) - - - - - - - - - - - - - - - - - - - - - - - 1.0 - 1.0 2.0 - - - -
Sans Souci (Public School) - - - - - 1.0 - - - - - - - - - - - - - - - - - 1.0 - - 2.0 - - - -
Seven Hills (Radio FM 103.2) 0.5 - - - - 0.5 1.0 - - - - - - - - - - - - - - - - - - 0.5 1.5 - - - -
Seven Hills (Collins St)





6.8

















1.0 2.2



Shanes Park (South Creek Road) - - - - - 0.2 1.2 - - - - - - - - - - - - - - - - 0.6 - 1.0 1.4 0.6 - - -
Springwood (Valley Heights) - - - 0.6 - 0.2 0.2 - - - - - - - - - - - 0.2 - - - - - - 1.8 3.0 0.4 - - -
St Ives (Richmond Avenue) - - - - - 0.2 0.6 - - - - - - - - - - - - - - - - 1.4 1.4 - 1.6 - - - -
Sydney (Observatory Hill Comparison) - - - - - - 1.4 - - - - - - - - - - - - - - -
3.4 1.8 - 1.8 0.2 - - -
Sydney (Observatory Hill) - - - - - - 1.4 - - - - - - - - - - - - - - - - 2.8 1.8 - 1.8 - - - -
Sydney Airport AMO - - - - - - 2.2 - - - - - - - - - - - - - - - - 0.6 0.2 0.2 1.2 0.2 - - -
Sydney Botanic Gardens - - - - - 0.2 2.4 - - - - - - - - - - - - - - - - 4.2 1.2 4.9 2.2 - - - -
Sydney Olympic Park AWS (Archery Centre) - - - 0.2 - 0.2 2.6 - - - - - 0.2 - - - - - - - - - - 2.4 1.2 0.2 1.0 - - - -
Terrey Hills AWS - - - - - - 0.2
- - - - - - - - - - - - - - - 1.4 - 0.2 0.8 - - - -
Wahroonga (Ada Avenue) - - - 0.2 - 0.2 3.0 - - 0.2 - - - - - - - - - - - - - 2.8 0.2 0.6 1.6 - - - -
Warragamba - - - - - - - - - - - - - - - - - - - - - - - - 3.0 2.0 4.0 - - - -
Wedderburn (Booalbyn) - - - - - - 1.0 - - - - - - - - - - - - - - - - 2.0 1.0 1.0 2.0 - - - -
Wyong (Kulnura (Jeavons)) - - - - - 1.0 1.0 - - - - - - - - - - - - - - - - - - 1.0 - - - - -
Wyong (Olney Forest) - - - - - - 5.0 - - - - - - - - - - - - - - - - - - 1.0 1.0 1.0 - - -
Yarramalong (Lewensbrook) - - - - - 0.2 1.4 - - - - - - - - - - - - - - - - - - - 1.4 - - - -
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 12 pm on Monday 3 September 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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