Greater Sydney in January 2018: Heatwaves and dry conditions

Greater Sydney experienced a hotter than average January, with a number of sites in western Sydney recording their hottest January day on record. Rainfall was below average across the region.

A hot start to the year

  • Heatwave conditions were experienced from the 6th to 8th across Greater Sydney, with many sites recording their warmest January day on record; Penrith Lakes recorded Greater Sydney's hottest temperature for the month of 47.3 °C on the 7th, and the second-hottest day ever recorded in Greater Sydney (Richmond holds the record of 47.8 °C in January 1939)
  • Milder conditions were experienced across the region on the 10th and again from the 14th to 18th, as cool changes moved through the area; Mount Boyce had Greater Sydney's coolest night of the month on the 15th when it dropped to 7.2 °C, while Mangrove Mountain experienced its coldest January night on record, dropping to 9.5 °C on the 18th
  • Hot days returned from the 18th, particularly in the western parts of Greater Sydney; eastern parts were spared from the worst of the heat during this period with the sea breeze moderating temperatures along the coast
  • Penrith Lakes AWS recorded four consecutive days over 40 °C from the 19th to the 22nd, the first time ever at this site and only the second time this has occurred anywhere in the Greater Sydney region (Richmond had four consecutive days over 40 °C in February 2009)
  • As a result of these heat events several sites, mostly in the west of the region, had their highest January mean daily maximum temperature on record
  • Very warm overnight temperatures and persistent high humidity were experienced during the last week of January; Bansktown Airport recorded its highest ever January minimum temperature of 24.8 °C on the 28th
  • A cool change at the end of the month brought relief across Greater Sydney, with the 31st being the coolest day for January 2018 for most sites
  • Overall, maximum temperatures were above average for the region, with some sites in the west being up to 4 °C warmer than normal; minimum temperatures were also mostly above average, however typically within 1 °C of normal

Drier than average to kick off 2018

  • Overall, Greater Sydney was drier than average, with Bankstown and Lucas Heights recording their lowest January rainfall in over 20 years
  • Most of the rain across the region fell during the 8th as a trough of low pressure brought widespread showers and thunderstorms; the highest total was 43.0 mm at Mount Wilson recorded over the 24 hours to 9am on the 9th
  • Light to moderate falls were also reported across Greater Sydney from the 1st to 5th and on the 31st; the Blue Mountains area also had light falls from the 23rd to 29th

Sydney (Observatory Hill)

  • The mean daily maximum temperature for Sydney (Observatory Hill) was 27.8 °C, which is 1.8 °C above the long-term average of 26.0 °C
  • The warmest day was 43.4 °C on the 7th, which is the fourth-hottest January day on record at Observatory Hill, and the coolest day was on the 31st when the temperature reached 22.0 °C
  • The mean daily minimum temperature for Sydney (Observatory Hill) was 20.1 °C, which is 1.4 °C above the long-term average of 18.7 °C
  • The coldest morning was 14.8 °C on the 14th, and the warmest morning was on the 28th when the minimum temperature was 24.0 °C
  • Total rainfall for Sydney (Observatory Hill) was 37.8 mm, which is only 37% of the long-term average of 101.7 mm; the rain fell on 13 days, which is slightly above the average of 12 days for January

Further information

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Extremes in January 2018
Hottest day 47.3 °C at Penrith Lakes AWS on the 7th
Warmest days on average 34.8 °C at Penrith Lakes AWS
Coolest days on average 24.5 °C at Sydney Harbour (Wedding Cake West)
Coldest day 13.6 °C at Katoomba (Murri St) on the 31st
Coldest night 7.2 °C at Mount Boyce AWS on the 15th
Coolest nights on average 14.6 °C at Mount Boyce AWS
Warmest nights on average 20.4 °C at Sydney Harbour (Wedding Cake West)
Warmest night 24.9 °C at Richmond RAAF on the 28th
Warmest on average overall 26.8 °C at Penrith Lakes AWS
Coolest on average overall 21.0 °C at Katoomba (Murri St)
21.0 °C at Mount Boyce AWS
Wettest overall 84.8 mm at Mount Wilson (Clarine)
Wettest day 43.0 mm at Mount Wilson (Clarine) on the 9th
Strongest wind gust 113 km/h at Wattamolla AWS on the 9th


Lowest January total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Average for
January
Bankstown Airport AWS 12.6 11.2 in 1994 91.8
Lucas Heights (ANSTO) 19.5 11.2 in 1994* 96.4

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




Record highest January temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Katoomba (Murri St) 36.7 on the 7th 36.4 on the 12th in 2013 56 23.3
Prospect Reservoir 45.3 on the 7th 45.1 on the 18th in 2013 53 28.5
Mount Boyce AWS 37.0 on the 7th 36.1 on the 12th in 2007 27 24.0
Mangrove Mountain AWS 44.0 on the 7th 43.6 on the 18th in 2013 24 27.2
Canterbury Racecourse AWS 44.9 on the 7th 44.6 on the 18th in 2013 23 27.8
Penrith Lakes AWS 47.3 on the 7th 46.5 on the 18th in 2013 23 30.8
Horsley Park Equestrian Centre AWS 45.6 on the 7th 44.9 on the 18th in 2013 21 29.8



Record highest January mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Katoomba (Murri St) 27.2 = 27.2 in 1919 90 23.3
Mount Boyce AWS 27.4 27.2 in 2017 26 24.0
Richmond RAAF 34.2 34.1 in 2017 24 30.2
Penrith Lakes AWS 34.8 33.9 in 2017 22 30.8
Horsley Park Equestrian Centre AWS 32.6 32.5 in 2017 20 29.8



Record highest January daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Bankstown Airport AWS 24.8 on the 28th 24.4 on the 14th in 2017 50 18.2



Record lowest January temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Mangrove Mountain AWS 9.5 on the 18th 9.6 on the 18th in 2009 24 16.9



Summary statistics for January 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
January
2018
Diff
from
average
Highest for
January
2018
Mean for
January
2018
Diff
from
average
Lowest for
January
2018
Total for
January
2018
Average
for
January
Rank of
January
2018
Fraction of
January
average
Badgerys Creek AWS 32.7 +2.7 45.0 7th 17.6 +0.5 10.6 18th 32.2 79.4 low 41%
Bankstown Airport AWS 31.3 +3.0 45.2 7th 18.8 +0.6 12.2 18th 12.6 91.8 v low 14%
Camden Airport AWS 32.9 +3.3 45.7 7th 17.5 +0.6 9.7 18th 41.2 79.8 average 52%
Campbelltown (Mount Annan) 32.7 +2.6 45.1 7th 17.3 +0.4 10.5 18th 28.6 80.7 v low 35%
Canterbury Racecourse AWS 29.7 +1.9 44.9 7th 18.7 +0.3 11.9 18th 24.6 80.8 low 30%
Cooranbong (Lake Macquarie AWS) 29.8   43.4 7th 17.2   8.8 18th 10.6 119.5 v low 9%
Gosford AWS 29.0   43.7 7th 18.9   12.3 18th 26.6
Holsworthy Aerodrome AWS 30.7   45.2 7th 17.7   10.5 18th 22.2
Horsley Park Equestrian Centre AWS 32.6 +2.8 45.6 7th 17.8 0.0 10.5 18th 17.6 75.7 low 23%
Katoomba (Murri St) 27.2 +3.9 36.7 7th 15.1 +2.3 7.7 14th 65.0 161.9 low 40%
Mangrove Mountain AWS 30.3 +3.1 44.0 7th 16.9 0.0 9.5 18th 27.0 103.3 v low 26%
Mount Boyce AWS 27.4 +3.4 37.0 7th 14.6 +1.3 7.2 15th 54.0 116.2 low 46%
Norah Head AWS 27.5 +1.5 33.6 7th 20.1 +0.4 15.3 18th 24.8 82.5 low 30%
Parramatta North (Masons Drive) 31.3 +2.8 45.0 7th 17.9 +0.3 11.0 18th 29.2 103.1 low 28%
Penrith Lakes AWS 34.8 +4.0 47.3 7th 18.9 +0.3 12.4 18th 36.4 94.8 average 38%
Prospect Reservoir     45.3 7th 18.1 +0.4 11.2 18th 32.4 95.3 low 34%
Richmond RAAF 34.2 +4.0 46.3 7th 18.0 +0.3 10.5 18th 19.2 81.7 v low 24%
Springwood (Valley Heights) 30.8 +2.2 43.2 7th 17.3 +0.1 12.0 14th 40.6 125.4 low 32%
Sydney (Observatory Hill) 27.8 +1.8 43.4 7th 20.1 +1.4 14.8 14th 37.8 101.7 low 37%
Sydney Airport AMO 29.2 +2.6 43.7 7th 20.1 +1.2 14.9 14th 27.6 94.6 low 29%
Sydney Harbour (Wedding Cake West) 24.5 -0.2 33.0 13th 20.4 +0.1 15.5 14th
Sydney Olympic Park AWS (Archery Centre) 30.1   44.5 7th 19.2   12.6 18th 29.8
Terrey Hills AWS 28.1 +1.4 42.7 7th 18.3 -0.1 13.0 14th

Daily maximum temperatures for January 2018
12345678910111213141516171819202122232425262728293031
Badgerys Creek AWS33.931.925.427.133.638.945.038.431.024.527.034.034.025.629.024.928.535.138.938.937.741.831.537.030.132.833.332.132.836.521.9
Bankstown Airport AWS31.429.625.725.330.735.245.237.832.924.625.531.135.525.427.824.827.533.336.037.633.738.530.534.329.430.231.230.331.033.523.3
Camden Airport AWS33.032.526.227.434.639.345.739.031.124.827.433.834.025.328.724.728.334.438.538.337.741.233.838.630.532.833.932.932.836.623.0
Campbelltown (Mount Annan)32.431.926.526.933.238.445.138.630.723.926.833.333.526.028.825.527.934.938.738.337.241.832.538.231.033.134.032.932.436.223.6
Canterbury Racecourse AWS29.528.823.824.528.231.744.935.932.424.424.829.534.823.925.423.024.030.233.536.130.435.728.832.030.329.830.530.030.731.022.1
Cooranbong (Lake Macquarie AWS)30.427.625.825.026.935.543.436.030.123.024.929.637.424.426.125.025.029.530.832.028.737.634.131.830.230.431.029.629.330.420.8
Gosford AWS30.127.724.624.427.835.043.736.529.823.524.829.435.823.123.822.523.427.430.633.530.034.828.830.529.128.830.129.029.930.320.6
Holsworthy Aerodrome AWS30.729.224.424.830.534.645.237.531.823.525.431.434.324.927.124.026.032.635.737.434.338.030.333.328.129.531.030.230.833.722.8
Horsley Park Equestrian Centre AWS33.431.826.527.133.038.545.640.130.825.026.633.534.925.728.325.427.534.638.138.636.441.030.837.229.032.733.732.632.936.023.6
Katoomba (Murri St)28.226.121.122.327.733.636.732.426.616.024.830.222.318.424.021.425.630.034.633.033.034.627.230.830.026.726.127.230.413.6
Mangrove Mountain AWS31.127.923.024.029.936.644.039.929.321.824.030.535.122.925.423.025.832.535.935.932.439.831.334.429.830.831.929.429.633.117.9
Mount Boyce AWS27.926.622.323.028.433.337.032.326.216.927.230.521.718.122.920.824.330.033.933.634.435.728.832.727.529.028.426.126.431.113.9
Norah Head AWS27.927.825.326.128.028.933.631.026.924.325.129.229.221.822.321.822.126.228.928.729.529.727.830.329.729.430.628.430.530.620.9
Parramatta North (Masons Drive)32.029.525.225.432.037.345.039.731.725.025.033.035.025.227.325.025.832.336.036.734.638.230.033.828.630.531.230.730.834.322.2
Penrith Lakes AWS36.134.927.329.136.242.347.342.532.526.629.136.335.627.430.526.829.936.540.540.240.343.232.438.734.035.236.134.134.938.922.9
Prospect Reservoir45.338.931.624.525.534.034.024.726.824.426.733.336.235.439.530.235.028.831.532.832.035.223.1
Richmond RAAF35.033.728.028.735.941.246.343.632.126.228.135.935.926.829.126.529.136.140.239.639.142.030.939.230.835.135.234.734.338.423.5
Springwood (Valley Heights)32.031.123.525.032.238.243.239.829.522.123.932.031.224.027.523.327.332.537.536.236.531.234.629.432.232.029.831.834.519.2
Sydney (Observatory Hill)29.827.025.124.026.129.843.431.930.224.924.027.234.324.526.523.525.826.228.330.427.329.626.828.027.127.427.927.028.628.722.0
Sydney Airport AMO28.328.723.824.527.930.843.736.332.823.825.329.935.722.423.421.522.928.432.034.630.634.529.231.328.928.730.429.230.832.021.8
Sydney Harbour (Wedding Cake West)25.224.022.422.222.724.931.928.726.222.123.326.833.021.122.420.621.122.623.624.523.625.625.124.924.724.625.024.824.924.920.7
Sydney Olympic Park AWS (Archery Centre)30.928.825.325.428.933.944.537.132.324.825.430.834.524.126.223.224.930.133.534.932.135.829.731.328.629.530.430.731.033.021.7
Terrey Hills AWS28.726.222.422.727.234.042.735.728.522.922.827.533.922.123.921.523.427.731.634.629.135.829.727.827.228.927.628.230.019.1
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 January 2018
12345678910111213141516171819202122232425262728293031
Badgerys Creek AWS18.816.018.117.713.516.619.221.421.118.017.320.022.713.914.016.513.910.612.212.114.815.521.517.821.720.223.124.419.717.816.8
Bankstown Airport AWS19.418.219.317.314.217.420.222.022.018.817.919.623.113.814.817.915.612.213.612.716.818.022.920.023.024.224.224.821.519.417.2
Camden Airport AWS18.915.318.117.912.815.018.521.420.817.417.120.223.013.914.516.213.39.711.611.314.114.822.618.322.222.022.424.120.017.616.5
Campbelltown (Mount Annan)17.715.918.017.612.515.418.620.920.817.716.019.222.013.113.216.612.010.511.711.314.715.821.717.321.821.922.324.020.418.016.2
Canterbury Racecourse AWS19.418.019.617.514.117.419.822.021.919.117.419.223.014.115.618.116.411.913.313.216.617.722.420.721.523.723.924.222.118.717.8
Cooranbong (Lake Macquarie AWS)18.717.718.716.912.214.717.921.522.919.618.718.522.316.315.518.715.58.89.710.013.314.417.617.018.520.022.622.117.415.818.3
Gosford AWS19.620.720.119.514.016.919.722.421.720.117.720.123.416.216.417.617.512.313.413.816.717.520.820.220.722.924.123.920.318.917.6
Holsworthy Aerodrome AWS18.815.918.417.713.117.918.620.221.217.616.418.921.712.913.616.813.510.512.111.316.017.222.118.422.223.223.524.120.318.916.7
Horsley Park Equestrian Centre AWS18.316.018.617.413.916.620.020.721.117.917.118.822.613.514.317.214.610.513.412.415.917.921.418.520.921.422.724.220.519.115.9
Katoomba (Murri St)15.013.113.811.612.317.424.420.016.713.612.414.919.17.77.78.88.111.017.316.718.021.320.916.716.617.218.215.214.312.3
Mangrove Mountain AWS17.117.517.815.412.514.822.320.120.517.316.218.920.413.612.616.112.49.511.511.815.116.017.719.318.920.921.822.120.417.315.5
Mount Boyce AWS14.412.812.911.312.616.224.119.815.813.112.214.618.37.57.28.17.810.515.615.016.720.521.017.217.516.716.617.514.413.312.5
Norah Head AWS20.921.220.220.117.720.221.821.921.920.620.521.522.616.816.417.617.315.316.917.819.520.521.421.321.322.223.023.021.721.118.7
Parramatta North (Masons Drive)17.716.518.516.212.819.821.420.618.016.718.822.513.513.517.515.211.013.613.016.017.021.820.520.622.823.024.020.717.816.3
Penrith Lakes AWS20.218.119.318.315.018.121.022.121.118.018.320.423.313.314.817.816.112.414.915.116.318.022.019.723.022.524.024.821.419.517.0
Prospect Reservoir18.816.819.017.113.716.520.522.221.218.517.519.513.516.817.416.311.213.813.516.517.521.919.520.921.923.124.518.716.3
Richmond RAAF18.016.819.418.513.016.519.622.321.618.318.419.622.215.412.717.815.510.512.812.014.316.321.319.621.620.724.224.920.317.617.3
Springwood (Valley Heights)17.716.617.115.713.516.122.021.420.016.116.118.920.912.012.514.913.215.212.616.515.117.519.021.020.622.122.220.116.915.2
Sydney (Observatory Hill)20.520.519.918.117.320.322.422.022.118.619.321.623.214.816.318.317.315.716.917.419.521.522.721.822.523.523.824.023.321.418.0
Sydney Airport AMO20.820.720.017.417.420.822.721.921.819.119.221.422.714.916.418.217.115.417.718.519.921.522.321.022.423.423.623.822.821.617.9
Sydney Harbour (Wedding Cake West)21.221.320.418.218.320.722.022.321.919.120.021.122.815.517.218.217.216.418.318.520.121.622.622.222.523.023.423.623.021.618.2
Sydney Olympic Park AWS (Archery Centre)20.218.419.917.615.218.021.222.621.919.218.219.923.014.415.718.316.912.614.113.517.119.422.821.022.524.124.224.822.420.017.0
Terrey Hills AWS19.218.317.916.515.118.021.620.620.417.117.119.721.613.014.216.315.313.015.815.317.819.420.120.120.321.122.522.620.819.715.7
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 January 2018
12345678910111213141516171819202122232425262728293031
Abbotsbury (Fairfield (City Farm)) - - 2.0 - - - - 2.0 5.0 4.0 - - - 1.0 - 1.0 - - - - - - - - - - - - 1.0 - -
Abbotsford (Blackwall Point Rd) - - - 1.5 - - - - 20.0 3.0




















Audley (Royal National Park) - - 1.0 - - - - 1.0 15.0 6.0 - - - 1.0 3.0 1.0 - - - - - - - - - - - 1.0 12.0 - -
Badgerys Creek AWS - - 17.8 - - - - - 12.6 1.2 0.2 - - - - - - - - - - - - - - 0.2 - - - - 0.2
Bankstown Airport AWS - - 1.2 1.0 - - - - 6.2 3.6 - - - 0.2 - - - - 0.4 - - - - - - - - - - - -
Baulkham Hills Eucalyptus Ct - - 2.0 2.0 - - - - 19.5 1.5 - - - 0.5 - - - - - - - - - - - - - - - - -
Belrose (Evelyn Place) 1.4 - 1.6 0.8 - - - 0.8 42.6 0.8 - - - 0.8 - - - - - - - - - - - - 0.8 - - - 1.0
Bilpin Post Office - 0.2 4.0



























Blackheath (Wombat Street) - - - 6.0 - - - - 22.0 10.0 1.0 - - 1.0 - - - - - - - - - - 3.0 5.0 6.0 2.0 3.0 - 2.0
Box Hill (McCall Gardens) - - 2.0 - - - - - 16.0 1.0 - - - - - - - - - - - - - - - - - - - - -
Camden Airport AWS - - 4.8 - - - - - 33.6 2.2 - - - 0.2 - - - - - - - - - 0.2 - - - - - - 0.2
Campbelltown (Kentlyn (Georges River Roa - - 2.0 - - - - - 16.0 5.0 - - - 3.0 - - - - - - - - - - - - - - - - -
Campbelltown (Mount Annan) - - 2.2 0.2 - - - - 24.4 1.4 - 0.2 - - - - - - - - - - - 0.2 - - - - - - -
Canterbury Racecourse AWS - - 2.4 0.8 0.2 - - 0.6 12.0 6.4 - 0.2 - 2.0 - - - - - - - - - - - - - - - - -
Castle Cove (Rosebridge Ave) 3.0 - - 1.5 0.5 - - 1.8 30.0 3.0 - - - 1.5 - - - - - - - - - - - 0.2 - - 0.2 - 0.5
Castle Hill (Kathleen Ave) - 0.2 0.7 - - - - - - - - - 3.0
















Castlereagh (Castlereagh Road) - - - - - - 31.2 4.4 - - - - - - - -













Chatswood Bowling Club 1.0 - - 1.0 - - - - 28.0 3.0 - - - 1.0 - - - - - - - - - - - - - - - - 1.0
Collaroy (Long Reef Golf Club) - - 1.0 - - - - - 38.8 0.6 - - - 5.5 2.5















Concord (Brays Rd) - - 0.4 0.2 0.4 - - - 21.0 2.0 - - - 0.6 - - - - - - - - - 0.6 - - 0.6 - - - 0.2
Concord Golf Club - - 0.4 1.0 - - - - 22.4 2.0




















Cooranbong (Avondale) - - 1.0 1.0 - - - - 5.0 3.0 - - - - - - - - - - - - - - - - - - - - 1.0
Cooranbong (Lake Macquarie AWS) 0.2 - 1.6 0.2 - - - - 5.2 2.4 - - - 0.4 - 0.2 - - - - - - - - - - - - - 0.2 0.2
Darkes Forest (Kintyre) - - - - - - - - 1.6 10.4 - - - - - - - - - - - - - - - - - - - - -
Dover Heights (Portland St) - - - 5.8 0.2 - - 1.0 24.0 11.8 - - - 5.6 1.4 - - - - - - - - 1.0 - 0.2 - - - - 1.2
Erskine Park Reservoir - - 1.0 - - - - 1.0 9.0 2.0 - - - - - - - - - - - - - - - - - - - - -
Faulconbridge (Great Western Hwy) - - 27.0 - - - - - 18.0 6.0 1.0 - - 1.0 - - - - - - - - 20.0 - - - - - - - 2.0
Faulconbridge (St Georges Crescent) - - 23.4 0.8 - - - - 17.6 5.6 3.8 - - 2.0 1.0 - - - - - - - 5.8 0.2 0.8 0.4 - - - - 2.8
Frenchs Forest (Frenchs Forest Rd) - - 1.0 3.0 - - - - 39.0 1.0 - - - 2.0 - - - - - - - - - - - - - - - - 4.0
Gosford AWS - - - 1.8 - - - - 18.2 2.8 - - - - - 0.8 - - - - - - - - - - - - - - 3.0
Holsworthy Aerodrome AWS - - 4.0 - - - - 1.0 9.8 5.6 - - - 1.6 0.2 - - - - - - - - - - - - - - - -
Hornsby (Swimming Pool) - - 0.6 1.0 - - - 0.4 30.8 0.8 - - - 2.0 - - - - - - - - - - - - - - - - 1.6
Horsley Park Equestrian Centre AWS 0.2 - 2.8 0.2 - - - 2.6 9.0 2.0 - - - 0.6 - - - - - - - - - - - - - - - - 0.2
Katoomba (Murri St) - - 3.8 5.0 - - - 0.4 19.0 7.4 1.6 - - 1.2 - - - - - - - - 1.2 0.6 11.6 4.6 1.0 4.4 - 3.2
Kurrajong Heights (Bells Line of Road) - - 15.8 0.5 1.6 - - - 16.8 10.8 0.8 - - 0.6 - - - - - - - - - 0.2 - - 2.0
Lucas Heights (ANSTO) - - 0.5 - - - - 0.6 13.0 3.6 - - - 1.4 - 0.2 - - - - - - - - - - - - - - 0.2
Macquarie Park (Willandra Village) - 0.2 0.6 1.0


























Mangrove Mountain AWS 0.2 - 4.2 1.8 - - - - 16.2 2.0 - - - - - - - - - - - - - - - - - - - - 2.6
Marrickville Golf Club - - 4.0 1.0 - - - - 10.0 8.0 - - - 1.0 1.0 - - - - - - - - - - - - - - - -
Menangle Bridge (Nepean River) - - 3.0 - - - - - 14.0 2.0 - - - - - - - - - - - - - - - - - - - - -
Milperra Bridge (Georges River) - - - 1.0 - - - - 6.0 1.0 - - - - - - - - - - - - - - - - - - - - -
Mona Vale Golf Club - - 1.2 1.6 - - - - 29.6 0.8 - - - 3.2 3.2 0.2 - - 0.2 0.2 0.2 0.2 - 0.2 - - - - - - 1.8
Mount Boyce AWS - 0.2 - 4.4 - - - - 20.6 7.0 0.8 - - 0.6 0.2 - - - - - - - - 0.4 3.8 3.4 7.4 2.6 1.4 - 1.2
Mount Wilson (Clarine) - - - 6.6 - - - 1.8 43.0 11.8 4.4 - - 1.0 - - - - - - - - - - 8.0 0.4 3.0 - 1.8 - 3.0
Norah Head AWS - - 0.6 0.2 - - - 0.6 15.8 1.8 0.2 - - - 5.0 - - - - 0.2 - - - - - - - - 0.2 - 0.2
North Rocks (Muirfield Golf Club) - - 1.0 0.5 - - - - 19.5 1.5 - - - 0.5 - - - - - - - - - - - - - - - - -
North Ryde Golf Club - - - 2.0 1.0 - - 1.0 18.0 4.0 - - - - - - - - - - - - - - - - - - - - -
Parramatta North (Masons Drive) - - 0.6 0.6 - - - - 24.0 2.0 - - - 1.4 - - - - - - - - - - - - - - - - 0.6
Peakhurst Golf Club - - 3.0 - - - - - 12.0 7.0 - - - - - - - - - - - - - - - - - - - - -
Pennant Hills (Yarrara Road) - - 1.4 0.8 0.2 - - 1.8 29.8 3.4 - - - 1.8 - - - - - - - - - - - - - - - 1.4
Penrith Lakes AWS - - 8.0 - - - - 0.2 23.2 3.0 0.2 - - 0.4 - - - - - - - - 1.2 - - - - - - - 0.2
Picton Council Depot - 0.8 11.4 - - 3.6 6.2 5.6 - - - - - - - - - - - - - 0.8 - - - - - 0.6 1.2
Prospect Reservoir - - 2.8 2.0 - - - - 23.4 2.2 - - - 1.6 - - - - - - - - - - - - - - - - 0.4
Putty (The Gibba) - - - 1.0 - - - - 8.0 3.0 1.0 - - - - - - - - - - - - - - - - 2.0 1.0 - -
Randwick (Randwick St) 7.6 - 4.0 4.4 1.2 - - 1.4 15.6 7.4 - - - 3.2 1.6 0.1 0.2 - - - - - - 0.6 - - - - - - 2.6
Richmond - UWS Hawkesbury - - 5.2 - - - - - 16.8 3.0 - - - - - - - - - - - - - - - 0.2 - - - - 0.2
Richmond RAAF 0.2 - 2.4 - - - - - 14.8 1.4 - - - - - - - - - - - - - 0.2 - - - - - - 0.2
Rose Bay (Royal Sydney Golf Club) - - 3.2 2.8 - - - 0.6 20.8 9.6 - - - 5.6 1.4 - - - - - - - - 0.6 - - - - - - 0.4
Rossmore (South Creek) - - 3.0 - - - - - 15.0 4.0 - - - - - - - - - - - - - - - - - - - - -
Sans Souci (Public School) 1.0 - 2.0 - - - - - 10.0 8.0 - - - 1.0 2.0 - - - - - - - - - - - - - - - -
Seven Hills (Radio FM 103.2) - - 2.0 - - - - - 24.0 1.5 - - - 2.0 - - - - - - - - - - - - - - - - -
Seven Hills (Collins St)

4.4




30.0 2.8


3.6
















Shanes Park (South Creek Road) - - 1.0 - - - - - 30.6 2.0 - - - 1.0 - - - - - - - - - - - - - - - - -
Springwood (Valley Heights) - - 11.4 0.6 - - - - 18.0 5.8 0.8 - - 1.0 - - - - - - - - 1.4 - 0.2 - - - - 1.4
St Ives (Richmond Avenue) - - 0.8 2.0 0.4 - - 0.8 24.6 1.6 - - - 2.2 - - - - - - - - - 0.2 - 0.2 - - 0.4 - 2.4
Sydney (Observatory Hill) 0.6 - 1.4 0.6 0.8 - - 2.4 18.6 5.8 - 2.8 0.2 1.8 0.2 - - - - - - - - 0.4 - - - - - - 2.2
Sydney Airport AMO - - 3.0 1.4 1.0 - - - 10.4 10.4 - - - 0.8 - - - - - - - - - - - - - - - - 0.6
Sydney Botanic Gardens - - 2.4 0.8 0.8 - - 2.6 21.4 7.4 - 2.0 - 2.0 0.4 - - - - - - - - 1.0 -





Sydney Olympic Park AWS (Archery Centre) - - 0.6 0.2 - - - - 26.4 1.8 - - - 0.4 - - - - - - - - - 0.2 - - - - - - 0.2
Terrey Hills AWS - - 2.2 1.4 0.2 - - 0.2 28.2 1.6 0.2 - - 3.8 0.2 - - - - - - 0.2 -
- - 0.4 0.2 - 0.2
Wahroonga (Ada Avenue) - - 0.8 1.8 0.2 - - 1.2 31.2 1.6 - - - 1.8 - - - - - - - - - - - - - - - - 2.0
Warragamba - - 11.0 - - - - - 22.0 6.0 - - - 2.0 - - - - - - - - - - - - - - - - -
Wedderburn (Booalbyn) - - 2.0 - - - - - 14.0 10.0 - - - 2.0 - - - - - - - - - - - - - - - - -
Wyong (Jilliby (Jilliby Creek)) - - 1.0 1.2 1.2 - - 0.6 24.0 3.4 - - - - - - - - - - - - - - - - - - - - 0.4
Wyong (Kulnura (Jeavons)) - - 3.0 - 1.0 - - - 10.0 2.0 - - - - - - - - - - - - - - - - - - - - -
Wyong (Mount Elliot) - - - 2.0 - - - - 22.0 4.0 - - - - 1.0 - - - - - - - - - - - - - - - 2.0
Wyong (Olney Forest) - - - 1.0 - - - - 19.0 2.0 - - - - - - - - - - - - - - - - - - - - 2.0
Yarramalong (Lewensbrook) - - 1.0 - 1.0 - - - 17.0 2.0 - - - - - - - - - - - - - - - - - - - - -
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 Thursday 1 February 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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