Greater Sydney in December 2018: Warm overall, with above average rainfall

December daytime and night time temperatures were both warmer than average across Greater Sydney, with particularly warm days occurring during the last week of the month. Rainfall was generally above average, owing to high rainfall totals between the 14th and 21st and damaging storms on the 20th

Above average rainfall

  • Rainfall totals were above average across many sites in the Greater Sydney region
  • Depending on the site, the heaviest rainfall was recorded on either the 14th, 20th or 21st
  • Widespread thunderstorm activity on the evening of the 20th resulted giant hail, damaging wind and intense bursts of rain. Extensive property damage was recorded in greater Sydney
  • Wedderburn (Booalbyn) recorded its highest total December rainfall since 1971

Very warm days and warm nights

  • Maximum temperatures across Greater Sydney were generally more than 1°C warmer than average
  • The last week of December saw daytime temperatures of more than 5°C than average
  • The highest temperature recorded was 41.4°C on the 28th at Penrith Lakes AWS
  • Minimum temperatures were generally more than 0.5°C warmer than average

Sydney (Observatory Hill)

  • Total rainfall for Sydney (Observatory Hill) was 95.0 mm, which is 122% of the long-term average of 77.6 mm
  • The mean daily maximum temperature for Sydney (Observatory Hill) was 26.8 °C, which is 1.6 °C above the long-term average of 25.2 °C
  • The warmest day was 34.0 °C on the 2nd, and the coolest day was on the 5th when the temperature reached 22.1 °C
  • The mean daily minimum temperature for Sydney (Observatory Hill) was 19.3 °C, which is 1.7 °C above the long-term average of 17.6 °C
  • The coldest morning was 14.9 °C on the 24th, and the warmest morning was on the 18th when the minimum temperature was 21.9 °C

Further information

Media
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Enquiries

Extremes in December 2018
Hottest day 41.4 °C at Penrith Lakes AWS on the 28th
Warmest days on average 31.5 °C at Penrith Lakes AWS
Coolest days on average 23.5 °C at Sydney Harbour (Wedding Cake West)
Coldest day 14.3 °C at Katoomba (Murri St) on the 5th
Coldest night 7.5 °C at Mount Boyce AWS on the 3rd
7.5 °C at Mount Boyce AWS on the 24th
Coolest nights on average 13.8 °C at Mount Boyce AWS
Warmest nights on average 19.4 °C at Sydney Harbour (Wedding Cake West)
Warmest night 21.9 °C at Sydney (Observatory Hill) on the 18th
21.9 °C at Cooranbong (Lake Macquarie AWS) on the 19th
Warmest on average overall 24.5 °C at Penrith Lakes AWS
Coolest on average overall 19.5 °C at Mount Boyce AWS
Wettest overall 169.2 mm at Holsworthy (Defence)
Driest overall 48.4 mm at Norah Head AWS
Wettest day 80.6 mm at Holsworthy (Defence) on the 14th
Strongest wind gust 100 km/h at Mount Boyce AWS on the 2nd

Highest December total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
December
Wedderburn (Booalbyn) 121.0 150.9 in 1971* 57.1

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




Lowest December total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Average for
December
Katoomba (Murri St) 30.8 29.6 in 1986 121.8



Summary statistics for December 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
December
2018
Diff
from
average
Highest for
December
2018
Mean for
December
2018
Diff
from
average
Lowest for
December
2018
Total for
December
2018
Average
for
December
Rank of
December
2018
Fraction of
December
average
Bankstown Airport AWS 29.8 +2.3 38.9 29th 17.6 +0.9 12.6 24th 114.8 68.5 high 168%
Camden Airport AWS 30.2 +1.6 39.6 28th 16.3 +1.0 10.5 24th 123.0 57.9 high 212%
Campbelltown (Mount Annan) 29.9 +1.7 39.2 28th 16.0 +0.7 10.7 24th 138.4 61.8 v high 224%
Canterbury Racecourse AWS 27.9 +1.3 36.1 30th 17.6 +0.7 11.8 24th 92.0 65.8 high 140%
Cooranbong (Lake Macquarie AWS) 28.5 +1.1 37.3 29th 16.1 0.0 10.8 7th 59.2 83.2 low 71%
Gosford AWS 27.6   35.9 29th 17.5   12.3 24th
Holsworthy (Defence) 29.6   40.9 28th 16.4   10.4 24th 169.2
Holsworthy Aerodrome AWS 29.3   38.7 29th 17.4   10.7 24th 120.2
Horsley Park Equestrian Centre AWS 29.6 +1.3 38.4 28th 16.9 +0.7 11.4 24th 130.0 66.4 v high 196%
Mangrove Mountain AWS 29.1 +2.8 38.2 29th 15.9 +0.4 10.8 24th 108.4 89.6 average 121%
Mount Boyce AWS 25.3 +2.8 33.8 29th 13.8 +2.2 7.5 3rd 86.2 84.7 average 102%
Norah Head AWS 26.0 +1.0 35.4 2nd 18.9 +0.5 15.2 24th 48.4 67.9 low 71%
Parramatta North (Masons Drive) 29.7 +2.2 38.3 29th 16.7 +0.4 10.2 24th 87.8 73.4 high 120%
Penrith Lakes AWS 31.5 +2.0 41.4 28th 17.6 +0.5 12.5 24th 93.6 63.3 high 148%
Richmond RAAF 31.0 +2.1 39.6 28th 17.0 +0.8 11.9 24th 101.2 70.0 high 145%
Springwood (Valley Heights) 28.7 +1.7 38.5 28th 16.0 +0.5 11.6 24th 132.2 101.8 high 130%
Sydney (Observatory Hill) 26.8 +1.6 34.0 2nd 19.3 +1.7 14.9 24th 95.0 77.6 high 122%
Sydney Airport AMO 28.4 +2.5 35.9 2nd 19.2 +1.6 15.0 24th 66.4 73.5 average 90%
Sydney Harbour (Wedding Cake West) 23.5 -0.1 33.5 2nd 19.4 +0.5 15.7 23rd
Sydney Olympic Park AWS (Archery Centre) 28.8   36.4 30th 18.1   12.4 24th 66.0
Terrey Hills AWS 26.3 +0.8 33.2 2nd 17.4 +0.7 12.7 24th 124.6 84.4 high 148%

Daily maximum temperatures for December 2018
12345678910111213141516171819202122232425262728293031
Badgerys Creek AWS31.633.630.925.720.527.129.132.232.827.624.523.430.7
Bankstown Airport AWS29.734.632.024.722.026.528.230.131.028.725.325.829.125.230.032.232.027.924.632.523.923.625.227.133.133.536.737.938.936.635.1
Camden Airport AWS31.933.630.825.720.627.129.132.733.027.624.523.929.524.631.734.832.628.024.033.522.022.524.728.434.035.037.739.639.237.436.0
Campbelltown (Mount Annan)31.433.730.325.520.826.929.032.032.527.924.323.929.324.030.633.331.827.824.333.721.922.124.228.233.534.337.439.239.037.436.3
Canterbury Racecourse AWS26.233.831.123.821.625.425.827.327.527.123.024.428.625.728.530.329.926.323.729.723.321.522.625.429.730.532.434.034.636.134.4
Cooranbong (Lake Macquarie AWS)25.836.631.325.622.824.825.927.828.030.022.722.928.328.130.031.231.228.625.035.623.923.823.825.028.030.230.035.937.334.130.8
Gosford AWS25.635.029.124.522.924.825.326.827.126.722.224.027.125.828.930.530.626.923.731.323.922.622.624.828.629.030.833.535.933.130.5
Holsworthy (Defence)31.935.331.723.719.626.128.231.231.326.823.321.227.924.929.932.931.925.524.333.822.121.223.128.434.534.439.040.940.837.535.8
Holsworthy Aerodrome AWS29.934.231.224.720.725.927.229.930.728.124.022.928.824.529.631.930.927.124.732.923.021.724.027.532.833.337.038.338.736.834.6
Horsley Park Equestrian Centre AWS31.234.030.824.721.126.728.831.731.927.423.823.830.523.731.333.231.428.023.532.922.921.923.927.033.433.436.938.438.336.835.0
Katoomba (Murri St)26.924.422.622.714.320.423.728.630.216.016.824.225.028.128.4
Mangrove Mountain AWS28.333.630.124.420.924.526.529.831.029.120.521.227.425.830.930.730.726.623.532.922.425.432.332.735.437.438.238.035.1
Mount Boyce AWS26.123.221.623.815.621.424.428.930.223.615.918.825.720.525.027.528.425.622.730.820.818.719.324.529.029.933.233.833.831.730.5
Norah Head AWS26.035.426.624.824.126.526.727.126.925.622.225.126.024.227.525.626.224.324.127.623.821.622.325.227.427.527.527.027.627.227.0
Parramatta North (Masons Drive)29.833.631.321.325.830.230.530.727.824.025.029.224.631.031.831.027.827.032.524.022.823.327.033.033.336.636.738.337.434.1
Penrith Lakes AWS33.634.731.427.620.828.330.434.435.228.124.224.230.924.433.036.534.529.325.435.023.323.625.729.735.536.739.641.440.940.537.3
Richmond RAAF33.034.331.227.321.427.729.933.734.528.424.723.432.024.533.135.533.729.126.334.723.523.224.929.134.635.638.239.639.039.036.1
Springwood (Valley Heights)31.332.029.825.119.025.227.331.532.025.722.021.526.422.329.035.532.026.422.932.021.320.922.726.732.634.535.638.538.036.934.5
Sydney (Observatory Hill)25.834.030.023.622.125.225.526.826.026.123.724.726.726.627.729.230.427.924.827.623.822.424.524.826.526.927.830.730.329.430.5
Sydney Airport AMO27.335.932.923.622.326.927.528.228.228.122.425.328.726.129.630.330.625.024.631.623.321.123.426.830.131.832.433.933.634.532.9
Sydney Harbour (Wedding Cake West)22.733.526.621.320.821.822.222.022.422.921.822.923.124.823.625.126.824.023.424.522.120.221.121.822.822.822.923.524.325.8
Sydney Olympic Park AWS (Archery Centre)28.334.131.623.822.425.827.128.929.427.723.424.329.825.529.431.831.027.324.431.123.221.823.426.731.532.433.835.335.936.433.8
Terrey Hills AWS24.233.229.821.920.823.423.825.426.425.223.122.326.424.627.828.228.625.723.128.321.320.421.723.928.029.331.332.632.432.630.4
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 December 2018
12345678910111213141516171819202122232425262728293031
Badgerys Creek AWS15.413.713.013.015.615.212.512.614.818.518.916.518.717.5
Bankstown Airport AWS15.815.114.416.516.317.013.714.617.921.320.016.719.518.420.718.520.021.218.620.316.314.712.616.017.518.018.418.819.620.6
Camden Airport AWS15.114.412.012.115.416.311.712.514.619.218.717.318.917.720.318.517.818.620.519.119.815.913.010.514.314.715.516.215.918.119.7
Campbelltown (Mount Annan)14.513.111.412.715.415.611.713.014.819.417.617.019.217.319.918.218.117.619.918.419.115.311.710.714.114.715.216.216.217.419.1
Canterbury Racecourse AWS15.614.714.118.016.317.213.714.216.520.820.016.819.318.420.520.619.021.620.318.020.516.314.711.815.717.017.418.718.319.119.8
Cooranbong (Lake Macquarie AWS)12.912.613.612.316.916.310.811.812.017.019.116.219.019.220.220.018.921.621.918.820.516.614.311.312.514.114.315.315.417.317.5
Gosford AWS14.014.814.616.016.717.313.514.515.018.219.918.519.619.721.220.719.121.821.118.121.117.214.912.315.116.416.517.817.818.720.4
Holsworthy (Defence)14.513.912.216.214.715.712.214.315.319.618.116.818.417.119.419.117.619.219.318.319.114.612.810.414.715.815.717.517.517.919.7
Holsworthy Aerodrome AWS16.614.713.117.015.816.513.615.217.120.819.417.219.317.720.419.618.820.520.219.620.015.714.110.715.117.717.618.418.018.520.0
Horsley Park Equestrian Centre AWS15.015.213.317.415.515.213.314.115.719.918.716.219.017.319.818.718.920.219.118.419.615.714.611.414.916.817.518.417.218.319.2
Katoomba (Murri St)10.416.28.412.711.110.79.113.018.212.812.214.015.115.616.813.1
Mangrove Mountain AWS12.915.211.613.415.114.611.712.414.817.317.014.917.518.418.817.618.119.519.117.117.813.010.813.816.116.618.717.417.617.8
Mount Boyce AWS10.615.87.511.410.710.58.211.917.114.111.911.513.714.115.014.815.713.914.915.512.99.98.17.512.816.718.921.420.720.019.2
Norah Head AWS17.917.617.118.117.818.217.818.718.218.719.619.120.020.120.420.319.720.121.220.620.618.015.415.217.619.219.520.120.119.219.0
Parramatta North (Masons Drive)15.315.014.016.915.815.112.116.413.519.919.317.018.817.819.818.218.520.819.818.017.515.314.010.214.815.716.618.017.318.019.0
Penrith Lakes AWS16.215.214.414.715.916.413.614.016.819.719.618.119.218.720.519.119.420.719.519.620.516.515.312.515.616.517.518.818.420.121.6
Richmond RAAF15.614.113.513.816.116.312.413.315.219.719.517.819.018.820.119.119.021.718.720.216.615.011.914.916.217.018.216.919.220.7
Springwood (Valley Heights)14.114.812.615.414.214.513.013.515.417.517.416.017.217.118.017.417.913.217.616.518.014.012.711.614.217.517.019.518.218.820.9
Sydney (Observatory Hill)19.117.716.919.317.418.117.018.819.020.519.819.219.619.721.621.120.921.920.820.020.616.715.214.918.620.420.621.320.520.821.7
Sydney Airport AMO18.517.916.319.616.417.718.419.119.720.219.818.620.018.719.721.520.421.520.219.720.416.515.315.019.019.821.021.720.620.021.1
Sydney Harbour (Wedding Cake West)18.518.317.319.817.617.818.219.619.520.120.220.119.319.420.820.920.720.120.720.020.817.115.716.418.720.420.821.120.320.720.8
Sydney Olympic Park AWS (Archery Centre)15.816.215.116.216.617.313.915.417.420.919.917.819.818.821.020.219.921.720.419.020.616.214.612.416.217.519.220.619.119.920.8
Terrey Hills AWS15.717.213.718.714.915.715.916.116.818.318.017.517.918.320.019.019.020.119.118.418.814.813.512.716.718.118.319.718.418.619.7
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 December 2018
12345678910111213141516171819202122232425262728293031
Abbotsbury (Fairfield (City Farm)) - - - - 3.0 - - - - - - - 1.0 50.0 25.0 17.0 - - 4.0 10.0 32.0 4.0 - - - - - - - - -
Abbotsford (Blackwall Point Rd) - - - - - 3.0 - - - - - - 2.0 15.0 8.0 11.0 - - - 15.0 - 2.0 - - - - - - - - -
Audley (Royal National Park) - - - - 2.0 2.0 - - - - - - 1.0 35.0 10.0 23.0 - - 2.0 4.0 1.0 2.0 2.0 - - - - - - - -
Avalon Beach (Avalon (Palmgrove Rd)) - - - - - - - - 1.0 - - - 0.2 1.4 1.6 11.0 16.6 - 0.4 0.4 40.8









Badgerys Creek AWS - - - - 1.2 0.2 - - - - - - 0.8 22.8
















Bankstown Airport AWS - - - - 1.0 2.4 0.2 - - - 0.2 - 2.4 28.8 7.6 24.8 - - - 8.8 34.2 3.6 0.6 0.2 - - - - - - -
Baulkham Hills Eucalyptus Ct - - - - - 1.0 - - - - 1.0 0.5 0.5 20.5 7.0 17.5 0.5 - 1.5 29.0 23.0 3.0 0.5 - - - - - - - -
Belrose (Evelyn Place) - - - - 1.0 0.6 - - - - - 0.2 2.2 4.0 17.6 21.4 - - 0.4 24.6 12.0 2.2 3.4 - - - - - - - -
Bilpin Post Office - - - - 6.0 4.4 - - - - - 1.8 4.4 25.0 22.0 11.4 - 5.6 31.8 6.0 5.0 - - - - - - - - -
Blackheath (Wombat Street) - - - - 5.0 3.0 - - - - - - 3.0 8.0 7.0 20.0 - - 3.0 31.0 2.0 5.0 - - - - - - - - -
Box Hill (McCall Gardens) - - - - - - - - - - - - - 13.0 21.0 11.0 - - - 23.0 10.0 2.0 - - - - - - - - -
Bringelly (Maryland) - - - - 1.0 - - - - - - - 1.0 38.0 41.0 22.0 - - - 9.0 7.0 1.0 - - - - - - - - -
Camden Airport AWS - - - - 1.6 0.2 - - - - - - 2.0 34.6 24.8 13.0 27.4 - - 2.2 16.2 0.8 - - 0.2 - - - - - -
Campbelltown (Kentlyn (Georges River Roa - - - - - 1.0 - - - - - - 2.0 53.0 22.0 15.0 1.0 - - 2.0 11.0 - - - - - - - - - -
Campbelltown (Mount Annan) - - - - 1.0 1.0 - - - - - - 1.0 38.8 27.8 23.2 25.6 - - 1.2 17.0 1.0 0.6 - 0.2 - - - - - -
Canterbury Racecourse AWS - - - - 1.0 3.6 - - - - 0.2 0.8 0.8 32.4 7.0 9.6 0.2 - 1.6 7.8 23.6 2.0 1.4 - - - - - - - -
Castle Cove (Rosebridge Ave) - - - - - 2.0 - - - - - 0.5 2.0 7.0 18.0 24.0 - - 1.0 15.0 22.0 3.5 6.0 - - - - - - - -
Castle Hill (Kathleen Ave) - - - - - - - - - - - - - 16.0 2.5 23.8 - - 2.0 29.2 13.2 2.9 - - - - - - - - -
Castlereagh (Castlereagh Road) - - - - 1.0 - - - - - - - 13.2 18.6 - -














Cawdor (Woodburn) - - - - - - - - - - - - 7.0 43.0 23.2 8.8 - - 8.0 - 5.8 - - - - - - - - - -
Chatswood Bowling Club - - - - - - - - - - - - 1.0 9.0 14.0 7.0 - - - 11.0 25.0 4.0 3.0 - - - - - - - -
Collaroy (Long Reef Golf Club) - - - - - - - - - - - - - 2.0 10.0 12.2 - - - 12.0 18.8 1.0 6.4







Colo Heights (Mountain Pines) - - - - 7.6 1.6 - - - - 1.4 - 1.4 22.2 - - - - 7.0 28.0 1.6 1.6








Concord (Brays Rd) - - - - 0.4 0.6 - - - - - - 2.2 20.8 6.4 12.6 0.4 - 2.4 12.0 36.4 1.0 1.4 - - - - - - - -
Concord Golf Club - - - - 1.0 0.4 - - - - - - 1.2 24.6 6.6 14.0 - - 2.0 12.8 47.0 1.4 1.8







Cooranbong (Avondale) - - - - 2.0 1.0 - - - - 6.0 7.0 1.0 2.0 2.0 14.0 3.0 - - 12.0 6.0 1.0 1.0 - - - 1.0 - - - -
Cooranbong (Lake Macquarie AWS) - - - - 2.8 0.2 - - - - 6.6 7.2 0.6 2.0 1.8 15.2 2.4 - 0.2 12.4 6.0 - 1.6 - - - 0.2 - - - -
Darkes Forest (Kintyre) - - - - 2.4 1.0 - - - - - 0.6 3.6 17.0 36.8 6.4 11.6 0.2 1.8 1.6 4.2 2.8 0.6 0.2 - 0.2 - - - - -
Dover Heights (Portland St) - - - - - 1.2 - - - - - - 1.0 13.0 13.6 5.2 - - 0.6 16.8 26.4 4.2 11.6 - - - - - - - -
Erskine Park Reservoir - - - - - - - - - - - - - 48.0 39.0 9.0 - - 2.0 12.0 21.0 3.0 - - - - - - - - -
Faulconbridge (Great Western Hwy) - - - - 6.0 1.0 - - - - - - 3.0 52.0 7.0 - 1.0 - - - 1.0 - - - - - - - - - -
Faulconbridge (St Georges Crescent) 0.2 - - - 7.6 1.4 - - - - 0.2 - 2.8 29.8 17.8 6.2 - - 5.6 28.6 6.2 3.4 0.4 - - - - 0.6 - - -
Gears (Wyong River) - - - - - - - - - - - - - -



1.0 -
-
- - -

- -
Gosford AWS


0.2 0.4 0.4 - - - - 0.4 1.4 - 0.8 2.6 4.4 0.2 - - 25.4 10.6 1.4 4.2 - - - - - - - -
Holsworthy (Defence) - - - - 0.6 3.4
- - - - - 6.0 80.6 38.6 18.4 8.0 -
2.4 8.4 2.4 - 0.4 - - - - - - -
Holsworthy Aerodrome AWS - - - - 1.8 1.4 - - - - - - 3.2 58.0 22.2 14.4 - - - 2.2 15.6 1.4 - - - - - - - - -
Hornsby (Swimming Pool) - - 0.2 - - 1.0 0.2 - - - - - 0.4 4.0 8.0 25.0 0.6 - 1.4 25.0 17.6 6.4 2.0 - - - - - - - -
Horsley Park Equestrian Centre AWS - - - - 1.4 0.2 0.2 - - - - 0.2 0.6 41.6 27.6 16.6 - - 4.4 12.4 22.0 2.4 0.2 - 0.2 - - -
- -
Katoomba (Murri St) - - - - 5.0 2.4 - - - 0.2 1.0 4.0 5.2 13.0 - -












Kurrajong Heights (Bells Line of Road) - - - - 10.4 1.0 - - - - - 0.8 2.4 19.6 20.0 1.0 - - 9.0 30.0 6.2 1.6 1.4 - - - - - - - -
Lucas Heights (ANSTO) - - - - 1.3 2.2 - - - - - - 1.4 44.3 7.2 4.8 - - - 2.6 - 0.6 0.4 - - - - - - -
Mangrove Mountain AWS - - - - - 0.8 0.2 - - - 2.0 1.0 1.0 0.4 32.6 23.0 0.2 - 2.0 33.4 11.8

- - - - - - - -
Marrickville Golf Club - - - - 2.0 4.0 - - - - - - 1.0 25.0 12.0 6.0 - - 2.0 6.0 32.0 2.0 1.0 - - - - - - - -
Menangle Bridge (Nepean River) - - - - - 1.0 - - - - - 3.0 - 36.0 22.0 24.0 12.0 - - 1.0 8.0 1.0 - - - - 4.0 6.0


Milperra Bridge (Georges River) - - - - - - - - - - - - - 21.0 7.0 23.0 - - - 6.0 22.0 1.0 - - - - - - - - -
Mona Vale Golf Club - 0.2 - - 0.2 0.8 - - 0.2 - 0.4 - 0.8 1.8 11.4 24.2 0.2 - 1.2 17.6 26.6 2.4 10.2 - 0.2 0.2 0.2 0.2 0.2 - 0.2
Mount Annan (Australian Botanic Garden) - - - - 3.0 1.4 - - - - 0.1 - 1.8 44.0 28.2 21.8 24.6 - - 1.6 16.2 1.6 0.4 - - - - - - - -
Mount Boyce AWS - - -
3.0 2.0 0.2 - - - - 0.8 3.0 7.0 7.0 21.4 0.2 - 3.0 29.8 2.4 6.2 0.2 - - - - - - - -
Mount Wilson (Clarine) 0.6 - - - 8.4 3.0 - - - - 0.6 0.8 4.4 19.6 13.2 5.0 - - 4.6 22.0 10.0 3.4 - - - - - - - - -
Norah Head AWS - 0.4 - - 0.2 3.0 0.2 - - 0.2 1.6 0.4 0.2 0.4 2.4 7.6 0.2 0.2 - 14.8 13.2 0.2 2.4 0.2 - - 0.2 0.2 - 0.2 -
North Parramatta (Burnside Homes) - - - - - 0.5 - - - - - - - 17.5 9.0 24.0 - -












North Rocks (Muirfield Golf Club) - - - - - 0.5 - - - - 0.5 0.5 0.5 17.0 7.5 18.5 - - 2.0 26.5 20.5 2.0 - - - - - - - - -
North Ryde Golf Club - - - - - - - - - - - - 1.0 20.0 6.0 10.0 1.0 - 1.0 10.0 31.0 3.0 - - - - - - - - -
Parramatta North (Masons Drive) - - - - 1.4 0.4 - - - - - - 0.6 19.0 9.4 23.0 - - 2.0 6.0 22.0 3.4 0.6 - - - - - - - -
Peakhurst Golf Club - - - - 1.0 3.0 - - - - - - 1.0 30.0 9.0 25.0 1.0 - 1.0 5.0 35.0 1.0 2.0 - - - - - - - -
Pennant Hills (Yarrara Road) - - - - 0.2 1.0 - - - - - - 0.6 10.8 41.2 - 2.2 26.8 22.0 7.2 - - - - - - - -
Penrith Lakes AWS - - - - 1.0 0.2 0.2 - - - - - 0.4 17.4 16.8 0.6 0.2 - 2.2 42.6 10.8 0.2 1.0 - - - - - - - -
Picton Council Depot - - - - 1.8 0.6 - - - - - - 3.2 32.4 34.6 - - 2.0 6.0 1.2 - - - - - 0.2
Prospect Reservoir - - - - - - - - - - - - 1.0 34.0 21.0 15.0 - - 3.0 15.0 17.0 4.0 - - - - - - - - -
Putty (The Gibba) 3.0 - - - 2.0 - - - - - 4.0 3.0 2.0 10.0 27.0 - - - - 9.0 1.0 - 1.0 - - - - - - - -
Randwick (Randwick St) - - - - 1.4 0.6 - - - - - - 2.0 19.8 14.2 6.4 0.1 - 0.4 7.6 25.0 4.8 11.0 - - - - - - - -
Richmond RAAF - - - - - - 0.2 - - - - - 1.4 14.8 27.0 - - - 0.2 40.6 13.4 1.4 2.0 0.2 - - - - - - -
Rose Bay (Royal Sydney Golf Club) - - - - - 0.8 - - - - - - 0.6 13.6 12.4 6.8 - - 0.4 12.8 26.0 4.0 13.0 - - - - - - - -
Rossmore (South Creek) - - - - 1.0 - - - - - - - 1.0 30.0 40.0 23.0 - - - 9.0 9.0 3.0 1.0 - - - - - - - -
Sans Souci (Public School) - - - - 1.0 - - - - - - - - 11.0 3.0 - - - - - - - - - - - - - - - -
Seven Hills (Radio FM 103.2) - - - - - 0.5 - - - 0.5 - - 3.0 30.0 20.5 7.0 - 0.5 1.5 16.0 25.0 4.0 0.5 - - - - - - - -
Seven Hills (Collins St)












44.0 21.0 11.2

2.6 22.0 26.2 2.2








Shanes Park (South Creek Road) - - - - 0.4 0.2 - - - - - - - 42.0 33.0 10.8 - - 0.6 35.8 21.2 0.6 0.2 0.2 - - - - - - -
Springwood (Valley Heights) - - - - 4.2 0.8 - - - - - 0.4 1.6 45.2 16.8 2.6 - - 4.0 47.4 7.2 1.4 0.6 - - - - - - - -
St Ives (Richmond Avenue) - - - - 0.8 1.6 - - - - - 0.2 0.6 4.4 12.2 15.6 - - 1.6 19.8 23.0 5.8








Sydney (Observatory Hill) - - - - - 1.2 - - - - - - 0.6 17.2 14.2 6.6 0.2 - 0.2 13.8 28.4 4.6 7.8 0.2 - - - - - - -
Sydney Airport AMO - - - - 0.8 1.6 0.2 - - - - - 0.4 23.0 10.8 3.6 - - 1.4 4.2 16.2 2.2 2.0 - - - - - - - -
Sydney Botanic Gardens - - - - 2.4 - - - - - - 0.6 0.4 18.4 13.8 8.4 - - 0.2 14.4 32.9 6.8 4.4 - - - - - - - -
Sydney Olympic Park AWS (Archery Centre) - - - - - 0.2 - - - - - - 0.6 21.6 9.2 16.6 - - 2.4 0.2 12.4 1.2 0.8 0.2 0.6 - - - - - -
Terrey Hills AWS - - - - 0.4 1.8 - - - - - - 1.0 5.4 23.8 34.8 - - 2.2 19.2 28.2 4.8 2.8 - - - - - 0.2 - -
Wahroonga (Ada Avenue) - - - - 0.4 1.6 - - - - - 0.2 0.6 5.6 6.8 21.2 0.4 - 2.2 23.4 21.8 6.4 2.4 - - - - - - - -
Warragamba - - - - 4.0 1.0 - - - - - - 2.0 38.0 21.0 2.0 - - 2.0 15.0 16.0 5.0 1.0 - - - - - - - -
Wedderburn (Booalbyn) - - - - - 2.0 - - - - - - 2.0 26.0 39.0 21.0 22.0 - - 1.0 7.0 1.0 - - - - - - - - -
Wyong (Kulnura (Jeavons)) - - - - - 1.0 - - - - 4.0 1.0 1.0 - 23.0 21.0 - - - 12.0 3.0 1.0 1.0 - - - - - - - -
Wyong (Mount Elliot) - - - - 1.0 - - - - - 1.0 1.0 - - 2.0 3.0 - - 1.0 23.0 18.0 2.0 6.0 - - - - - - - -
Wyong (Olney Forest) - - - - 7.0 - - - - - 6.0 2.0 2.0 4.0 10.0 20.0 - - 3.0 6.0 2.0 1.0 1.0 - - - - - - - -
Yarramalong (Lewensbrook) - - - - 1.0 - - - - - 1.8 1.6 0.4 - 14.0 16.0 - - - 40.4 7.4 1.0 2.0 - - - - - - - 4.0
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.

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 9 am on Friday 4 January 2019. 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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