Greater Sydney in January 2020: record heat, severe storms, smoke and dust

Greater Sydney experienced a range of significant weather during January 2020, including extreme heat, severe thunderstorms and poor air quality from continuing bushfires nearby. Overall, mean minimum and maximum temperatures were warmer than average. Rainfall was generally below average, however, there were more rain days than usual.

Below average rainfall totals

  • Rainfall was slightly below average across the region with most sites recording 50% to 80% of their average January rainfall totals; Camden, Campbelltown and Terrey Hills however, reported above average rainfall for the month
  • A deep inland trough drew in humid air across the region, resulting in widespread shower and thunderstorm activity from the 16th to 18th, with lighter and more isolated falls persisting for a further few days; 65.4 mm was recorded at Cooranbong (Lake Macquarie AWS) in the north of the region on the 18th, the wettest day of the month
  • Other rain days were generally the result of isolated thunderstorm activity, most notably on the 20th
  • The rain fell over 15 days at Sydney (Observatory Hill), which is above the January average of 12 days
  • Sydney Airport recorded 5.1 hours of bright sunshine per day, well below the average of 7.5 hours per day

Warm days and nights throughout

  • Mean maximum temperature were mostly 1 °C to 2 °C above average across the region, with Mount Boyce and Katoomba in the Blue Mountains recording daytime temperatures 3.0 °C and 3.6 °C above the January average respectively
  • The 4th saw exceptional heat and elevated fire danger across Greater Sydney, with dry and gusty hot northwest winds sweeping over the area; most sites reached the mid 40s on this day and many sites had their highest January temperature on record
  • Penrith Lakes AWS recorded 48.9 °C on the 4th, which broke the record for the highest temperature ever recorded in the Sydney basin (exceeding the previous record of 47.8 °C recorded at Richmond RAAF in 1939)
  • The heat and elevated fire danger returned on the 23rd, with many sites exceeding 40 °C, before a strong and gusty southerly change moved through the region bringing cooler conditions and isolated thunderstorm activity
  • Sydney (Observatory Hill) recorded seven days of 30 °C or higher, which is double the average number of days for January
  • Mean minimum temperatures were also above average in Greater Sydney, with most sites being 1 °C to 2 °C above average for the month
  • Norah Head had its warmest January night (highest daily minimum temperature) on record on the 24th, and also its highest January mean daily minimum temperature on record

Sydney (Observatory Hill)

  • Total rainfall for Sydney (Observatory Hill) was 71.4 mm, which is 71% of the long-term average of 101.2 mm
  • The mean daily maximum temperature for Sydney (Observatory Hill) was 28.1 °C, which is 2.1 °C above the long-term average of 26.0 °C and the seventh-warmest on record for January
  • The warmest day was 41.3 °C on the 23rd, and the coolest day was on the 17th when the temperature reached 22.1 °C
  • The mean daily minimum temperature for Sydney (Observatory Hill) was 20.9 °C, which is 2.1 °C above the long-term average of 18.8 °C and the equal fourth-warmest on record for January
  • The coldest morning was 17.4 °C on the 13th, and the warmest morning was on the 26th when the minimum temperature was 24.5 °C

Other phenomena

  • Severe thunderstorms moved over Greater Sydney on the 20th, with widespread hail reported; several locations reported hail up to 4.5 cm, with up to 6 cm hail being reported in Sydney's southwest. Damaging winds in the Sutherland Shire resulted in trees downed and power outages. Two people were hospitalised due to being struck by lightning at Katoomba.
  • Poor air quality was recorded on several days in Sydney due to nearby bushfire activity and dust; raised dust in the air resulted in brown dirty rain falling in Greater Sydney, with the worst of it falling on the 24th

Further information

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Extremes in January 2020
Hottest day 48.9 °C at Penrith Lakes AWS on the 4th
Warmest days on average 32.5 °C at Penrith Lakes AWS
32.5 °C at Richmond RAAF
Coolest days on average 25.3 °C at Sydney Harbour (Wedding Cake West)
Coldest day 14.2 °C at Katoomba (Farnells Rd) on the 11th
Coldest night 9.7 °C at Katoomba (Farnells Rd) on the 12th
Coolest nights on average 13.8 °C at Katoomba (Farnells Rd)
Warmest nights on average 21.2 °C at Norah Head AWS
Warmest night 26.8 °C at Cooranbong (Lake Macquarie AWS) on the 24th
Warmest on average overall 26.2 °C at Penrith Lakes AWS
Coolest on average overall 20.5 °C at Katoomba (Farnells Rd)
Wettest overall 134.4 mm at Faulconbridge (St Georges Crescent)
Driest overall 34.0 mm at Abbotsbury (Fairfield (City Farm))
Wettest day 65.4 mm at Cooranbong (Lake Macquarie AWS) on the 18th
Strongest wind gust 111 km/h at Wattamolla AWS on the 11th


Record highest January temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Katoomba (Farnells Rd) 39.8 on the 4th 36.7 on the 7th in 2018 57 23.4
Bankstown Airport AWS 47.0 on the 4th 46.1 on the 18th in 2013 52 28.5
Parramatta North (Masons Drive) 47.0 on the 4th 45.5 on the 18th in 2013 52 28.6
Mount Boyce AWS 38.0 on the 4th 37.0 on the 7th in 2018 29 24.3
Richmond RAAF 47.4 on the 4th 46.4 on the 18th in 2013 27 30.4
Badgerys Creek AWS 47.6 on the 4th 45.8 on the 18th in 2013 25 30.3
Canterbury Racecourse AWS 45.9 on the 4th 44.9 on the 7th in 2018 25 27.9
Penrith Lakes AWS 48.9 on the 4th 47.3 on the 7th in 2018 25 31.2
Horsley Park Equestrian Centre AWS 47.0 on the 4th 45.6 on the 7th in 2018 23 30.1



Record highest January daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Norah Head AWS 24.1 on the 24th 23.4 on the 27th in 2001 25 19.8



Record highest January mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Norah Head AWS 21.2 21.0 in 2017 24 19.8



Summary statistics for January 2020
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
January
2020
Diff
from
average
Highest for
January
2020
Mean for
January
2020
Diff
from
average
Lowest for
January
2020
Total for
January
2020
Average
for
January
Rank of
January
2020
Fraction of
January
average
Badgerys Creek AWS 31.2 +0.9 47.6 4th 19.2 +1.9 15.2 13th 49.0 75.1 average 65%
Bankstown Airport AWS 30.0 +1.5 47.0 4th 19.9 +1.6 15.8 13th 67.8 91.5 average 74%
Camden Airport AWS 30.9 +1.2 46.2 4th 18.8 +1.8 15.1 21st 89.0 79.9 average 111%
Campbelltown (Mount Annan) 30.6 +0.1 45.5 4th 18.5 +1.3 14.6 13th 100.0 81.7 high 122%
Canterbury Racecourse AWS 28.8 +0.9 45.9 4th 19.5 +1.0 14.7 13th 56.8 79.6 average 71%
Cooranbong (Lake Macquarie AWS) 29.7 +0.6 45.1 4th 19.7 +1.8 13.6 12th 79.6 111.2 average 72%
Gosford AWS 28.5   44.4 4th 20.4   16.6 21st 125.6
Holsworthy Aerodrome AWS 29.5   45.9 4th 19.3   15.5 13th 79.8
Holsworthy Defence AWS 29.2   45.2 4th 18.2   14.7 13th 93.8
Horsley Park Equestrian Centre AWS 31.0 +0.9 47.0 4th 19.1 +1.2 15.4 13th 34.0 73.7 average 46%
Katoomba (Farnells Rd) 27.0 +3.6 39.8 4th 13.8 +0.9 9.7 12th 127.1 161.6 average 79%
Mount Boyce AWS 27.3 +3.0 38.0 4th 14.6 +1.1 10.2 6th 99.2 118.1 average 84%
Norah Head AWS 27.8 +1.6 40.7 23rd 21.2 +1.4 19.0 12th 36.0 80.8 low 45%
Parramatta North (Masons Drive) 30.2 +1.6 47.0 4th 18.9 +1.2 14.5 13th 67.0 101.5 average 66%
Penrith Lakes AWS 32.5 +1.3 48.9 4th 20.0 +1.3 16.7 13th 82.0 93.6 average 88%
Richmond RAAF 32.5 +2.1 47.4 4th 19.8 +1.9 16.1 21st 40.4 81.6 average 50%
Springwood (Valley Heights) 29.6 +0.6 45.1 4th 18.2 +0.8 14.1 13th 99.2 125.1 average 79%
Sydney (Observatory Hill) 28.1 +2.1 41.3 23rd 20.9 +2.1 17.4 13th 71.4 101.2 average 71%
Sydney Airport AMO 29.0 +2.3 43.7 23rd 20.4 +1.4 17.3 13th 59.6 94.1 average 63%
Sydney Harbour (Wedding Cake West) 25.3 +0.5 40.4 23rd 20.9 +0.5 18.6 13th
Sydney Olympic Park AWS (Archery Centre) 29.8   47.1 4th 20.0   16.0 13th 66.0
Terrey Hills AWS 27.1 +0.1 44.5 4th 19.0 +0.5 16.3 13th 125.6 94.1 high 133%

Daily maximum temperatures for January 2020
12345678910111213141516171819202122232425262728293031
Badgerys Creek AWS30.528.834.847.628.323.834.427.326.537.622.520.526.730.131.630.122.424.223.632.333.235.242.427.632.039.133.135.130.934.439.6
Bankstown Airport AWS27.427.432.647.026.724.232.427.926.733.023.021.726.428.630.130.322.524.824.630.932.032.841.827.129.837.730.432.528.732.035.5
Camden Airport AWS31.228.135.246.227.924.234.827.526.337.422.920.926.930.031.830.522.624.424.130.632.635.040.727.629.437.433.034.930.533.738.5
Campbelltown (Mount Annan)30.627.434.445.527.425.334.627.426.136.122.220.226.530.230.829.721.924.024.531.232.834.840.926.930.537.733.034.229.933.337.9
Canterbury Racecourse AWS25.125.731.245.924.925.429.926.625.630.822.821.926.828.128.128.822.523.425.429.530.530.641.527.129.436.228.730.927.730.032.4
Cooranbong (Lake Macquarie AWS)26.925.330.945.127.723.432.129.525.432.122.124.426.427.827.830.025.123.327.233.034.532.942.029.328.534.230.332.128.029.133.3
Gosford AWS26.226.429.944.425.823.929.026.124.431.022.223.825.527.327.029.323.322.225.131.430.332.641.627.828.034.428.630.526.828.032.1
Holsworthy Aerodrome AWS27.326.031.445.925.332.726.826.332.922.321.226.027.729.521.923.824.230.230.732.741.325.828.837.130.631.528.432.134.7
Holsworthy Defence AWS28.425.232.445.224.123.534.125.425.134.121.019.825.127.429.628.221.022.623.629.331.633.142.026.129.337.930.633.127.832.937.0
Horsley Park Equestrian Centre AWS29.928.634.447.028.123.833.928.126.536.922.620.627.330.131.330.321.623.824.432.433.235.542.028.130.738.732.535.429.933.938.2
Katoomba (Farnells Rd)35.026.731.239.827.719.231.726.718.335.014.215.021.027.027.225.014.821.727.226.231.732.827.423.932.028.929.926.930.036.3
Mangrove Mountain AWS21.330.624.135.120.522.125.127.827.120.119.824.031.840.8
Mount Boyce AWS36.028.233.538.028.620.630.630.319.135.417.116.622.327.428.423.515.716.521.327.225.431.132.627.525.431.028.532.327.531.336.6
Norah Head AWS26.323.227.529.523.724.026.424.023.630.622.226.626.728.227.327.425.522.325.630.831.230.640.727.426.832.429.131.428.130.633.0
Parramatta North (Masons Drive)27.528.033.047.026.823.832.729.026.035.023.321.826.728.430.530.222.023.325.232.033.033.841.229.030.637.330.233.128.731.536.0
Penrith Lakes AWS33.531.437.748.930.224.035.328.826.840.523.323.829.332.433.030.922.124.423.933.334.338.842.429.931.339.134.136.831.234.841.2
Richmond RAAF33.431.137.047.429.525.234.628.926.540.323.323.428.432.232.831.422.324.625.134.534.537.742.429.730.938.234.637.931.834.642.0
Springwood (Valley Heights)31.128.234.545.127.921.533.225.223.837.020.320.524.729.530.029.121.022.322.030.733.134.939.926.827.537.331.234.024.532.038.3
Sydney (Observatory Hill)26.225.828.635.927.425.127.328.026.728.723.322.225.926.326.226.522.123.026.527.732.031.841.326.528.632.029.330.329.328.730.8
Sydney Airport AMO26.226.630.943.324.425.229.624.626.031.522.523.327.128.528.728.522.622.824.930.030.432.743.726.629.437.728.430.027.131.433.7
Sydney Harbour (Wedding Cake West)22.223.025.729.823.123.324.023.523.525.321.821.523.323.623.924.222.722.323.525.527.530.440.424.925.328.626.326.725.425.526.1
Sydney Olympic Park AWS (Archery Centre)27.127.232.347.126.125.533.027.826.133.223.521.726.528.428.931.222.523.725.731.331.932.742.027.529.637.229.632.128.031.534.2
Terrey Hills AWS25.324.829.144.525.222.428.224.723.928.921.120.624.426.325.927.120.520.624.227.729.429.439.525.427.133.027.430.126.027.530.7
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 2020
12345678910111213141516171819202122232425262728293031
Badgerys Creek AWS18.519.520.819.120.816.419.020.921.021.218.216.615.216.715.920.218.918.018.518.616.517.216.421.920.222.523.921.722.817.220.8
Bankstown Airport AWS19.320.020.920.621.717.920.121.220.621.518.317.915.816.516.821.118.618.518.919.516.718.518.522.222.124.023.622.322.917.621.9
Camden Airport AWS18.019.620.318.919.615.919.120.621.120.918.116.815.415.715.519.818.118.118.118.715.116.516.619.619.722.823.621.622.316.820.9
Campbelltown (Mount Annan)17.618.920.018.219.915.618.619.720.320.917.616.614.615.115.319.817.917.917.918.215.216.516.221.119.122.823.121.021.516.120.5
Canterbury Racecourse AWS19.119.721.319.721.417.119.821.221.221.418.718.914.716.415.820.118.218.318.719.415.717.917.622.621.824.122.921.522.916.920.5
Cooranbong (Lake Macquarie AWS)20.319.020.817.721.817.820.722.820.720.221.113.618.116.215.418.119.919.619.218.516.018.717.226.822.922.821.119.723.019.820.2
Gosford AWS19.819.621.419.422.018.420.522.021.720.919.718.418.317.916.721.021.619.318.919.216.618.519.122.923.723.423.921.223.518.723.0
Holsworthy Aerodrome AWS18.519.320.119.420.820.519.721.317.717.515.515.615.620.018.018.118.119.216.317.217.322.221.223.223.221.622.417.022.1
Holsworthy Defence AWS17.518.118.919.019.716.218.519.819.620.416.716.714.715.014.818.717.517.417.318.115.315.917.319.619.422.622.120.920.915.521.3
Horsley Park Equestrian Centre AWS18.619.120.719.120.716.718.920.220.720.917.716.615.417.016.420.118.118.017.818.316.417.517.020.821.722.923.521.522.217.320.5
Katoomba (Farnells Rd)10.812.612.815.214.89.812.015.613.813.113.19.710.011.412.015.413.313.012.713.013.316.415.615.716.617.118.015.413.418.6
Mangrove Mountain AWS19.316.417.319.418.419.117.815.216.415.115.218.718.917.717.118.116.017.119.023.2
Mount Boyce AWS12.113.513.717.215.510.212.917.213.714.714.310.410.511.611.715.814.013.813.313.813.013.417.916.416.417.718.119.116.413.819.4
Norah Head AWS19.319.120.720.221.020.221.121.521.121.220.019.020.120.220.421.621.720.219.520.620.421.021.524.123.523.523.022.523.621.923.4
Parramatta North (Masons Drive)19.018.620.219.221.216.519.521.220.220.418.018.214.515.215.515.517.817.617.818.218.817.217.220.621.422.623.021.422.216.820.2
Penrith Lakes AWS19.719.320.821.322.018.020.221.921.821.018.517.116.717.917.220.819.518.818.919.217.017.718.220.421.123.124.123.622.719.221.4
Richmond RAAF19.818.620.620.422.117.920.121.821.621.018.817.116.917.216.520.219.419.318.918.816.117.617.120.620.923.324.724.122.718.020.9
Springwood (Valley Heights)17.216.817.720.220.315.717.820.519.019.017.014.914.115.816.315.717.717.517.117.117.517.419.419.119.020.022.222.221.218.920.0
Sydney (Observatory Hill)19.219.522.121.321.619.820.221.321.421.719.319.217.419.219.121.518.818.619.020.419.820.423.123.222.524.522.823.223.220.223.5
Sydney Airport AMO18.519.120.922.120.819.320.021.020.521.018.919.417.319.419.220.718.118.218.420.118.920.722.422.321.724.022.022.522.520.323.5
Sydney Harbour (Wedding Cake West)18.919.621.221.221.020.320.321.421.021.219.219.018.620.020.221.418.618.619.620.421.121.122.623.121.923.722.522.923.421.223.7
Sydney Olympic Park AWS (Archery Centre)19.519.721.220.921.718.020.121.821.120.818.818.316.017.017.121.118.618.518.919.517.419.018.521.921.824.023.522.423.018.122.0
Terrey Hills AWS17.717.319.619.419.916.918.819.919.119.817.216.916.317.017.220.417.517.317.518.718.118.522.320.620.122.421.420.820.718.221.6
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 2020
12345678910111213141516171819202122232425262728293031
Abbotsbury (Fairfield (City Farm)) - - - - - - - - 1.0 1.0 - - - - - 2.0 6.0 19.0 - 1.0 - - - 1.0 2.0 - 1.0 - - - -
Abbotsford (Blackwall Point Rd) - - - - - - 4.0 - - - - - - - - 11.0 20.0 30.0 - - - - 3.0 - 5.0 - 2.0



Audley (Royal National Park) - - - - - - 2.0 6.0 - - - - 4.0 - - 7.0 59.0 16.0 3.0 1.0 25.0 - - 1.0 3.0 - 5.0 - - - -
Avalon Beach (Avalon (Palmgrove Rd)) - 1.2 - - - 1.6 2.6 1.4 - 2.0 1.2 5.2 - - - - - 75.0 9.4 0.8 6.8 - - 3.4






Badgerys Creek AWS - - - - - - 0.4 8.2 - - - 0.6 2.2 - - 7.6 5.4 13.0 3.4 2.2 2.4 0.2 - 0.6 2.8 - - - - - -
Bankstown Airport AWS - - - - - - 2.0 10.2 - - 0.4 0.8 1.8 - - 4.4 24.4 10.0 3.0 2.0 0.2 - - 1.8 4.4 - 2.4 - - - -
Baulkham Hills Eucalyptus Ct - - - - - - 2.0 5.5 0.5 - - 0.5 0.5 - - 2.0 35.0 11.0 7.5 - - - - 3.0 4.5 - 5.0 - - - -
Belrose (Evelyn Place) - 0.8 0.2 - - 0.2 - 0.6 0.6 0.4 0.4 0.2 3.4 - - - 50.4 26.0 7.6 0.4 4.0 - - 2.2 0.8 2.6 - - -
Bilpin Post Office - 1.4 0.8 - 0.4 7.8 6.0 - 1.0 0.6 5.6 - - 8.4 24.0 7.4 12.2 0.2 - - - 5.6 3.2 - 2.4 - -
Blackheath (Wombat Street) - - 1.0 - - 1.0 4.0 1.0 1.0 2.0 1.0 4.0 4.0 - - 18.0 16.0 4.0 7.0 14.0 1.0 - - 9.0 3.0 - 1.0 2.0 1.0 - -
Box Hill (McCall Gardens) - - - - - - 2.0 2.0 - - - - 1.0 - - - 10.0 7.0 8.0 1.0 - - - 9.0 - - - - - - -
Bringelly (Maryland) - - - - - - - 9.0 - - - 1.0 4.0 - - 8.0 7.0 4.0 3.0 5.0 10.0 - - 3.0 4.0 - - - - - -
Camden (Brownlow Hill) - - - - - - - 18.4 - - 0.2 - 5.6 - - 14.2 10.0 7.0 2.0 - 21.2 - - 4.8 8.2





Camden Airport AWS - - - - - - - 12.4 - - 0.2 0.2 6.2 - - 17.8 13.2 5.2 2.0 6.2 13.8 - - 6.6 5.2 - - - - - -
Campbelltown (Mount Annan) - - - - - - 1.2 11.0 - - 0.2 0.4 7.6 - - 10.4 32.0 7.6 3.2 1.8 16.6 - - 2.4 5.6 - - - - - -
Canterbury Racecourse AWS - - - - - - 2.8 0.8 - - - - 0.6 - - 3.8 21.4 20.0 3.6 - - - - - 2.8 - 1.0 - - - -
Castle Cove (Rosebridge Ave) - 0.2 2.5 - - 0.2 4.5 - - - 0.5 - 1.0 - - - 8.0 38.0 8.0 - 2.5 - - - 4.0 - - - 0.2

Castle Hill (Kathleen Ave) - - - - - - 4.0 3.0 - - 0.6 1.2 1.8 - 2.0 - 34.4 10.4 5.4 0.3 - - - 6.0 1.2





Castlereagh (Castlereagh Road) - - - - - 1.2 - - - - 0.8 - - - - 40.4














Centennial Park - - - - - - 2.0 0.8 - - - - - -
















Chatswood Bowling Club - - 1.0 - - - 7.0 - - - - - 2.0 - - 1.0 24.0 28.0 7.0 - - - - - 2.0 - - - - - -
Collaroy (Long Reef Golf Club) - - - - - - 8.8 - - - - 0.4 1.0 - - - - 62.2 7.4 0.2 8.2 - - 1.4






Colo Heights (Mountain Pines) - 0.8 - - - - 5.8 3.0 - 0.2 0.2 - - - - 5.8 44.8 2.6 7.2 0.8 4.2 - - - 2.4 - 4.8 - 6.8 - -
Concord (Brays Rd) - - - - - - 4.0 0.4 - - - 0.4 3.0 - - 9.6 16.4 23.4 2.4 - 0.2 - - - 3.2 - 5.4



Concord Golf Club - - - - - - - - - - - 2.0 2.0 - - 8.6 24.8 0.8 2.6











Cooranbong (Avondale) - 1.0 - - - - 1.0 - 1.0 - - - - - - - - 55.0 2.0 2.0 - - - - - 1.0 2.0 - 1.0 - -
Cooranbong (Lake Macquarie AWS) - 0.8 0.2 - - - 1.6 - 1.2 - - 0.4 - - - - - 65.4 1.6 1.8 0.6 - - - - 0.8 2.4 - 2.8 - -
Darkes Forest (Kintyre) - - - - - - 3.8 0.2 - - 0.2 - - - - 3.8 32.2 14.4 - 0.2 0.2 - - - 1.0 0.2 - - - - -
Dover Heights (Portland St) - - - - - 0.4 2.8 1.8 - 0.1 0.4 - 1.0 - - 4.4 5.6 45.0 5.4 0.2 2.6 - - 0.1 1.0 0.2




Erskine Park Reservoir - - - - - - - 6.0 - - - 1.0 - - - 13.0 7.0 8.0 5.0 2.0 - - - 2.0 3.0 - - - 1.0 - -
Faulconbridge (Great Western Hwy) - - - - - - 1.0 4.0 - 2.0 - 3.0 2.0 - - 48.0 16.0 7.0 4.0 6.0 - - - 12.0 12.0 - - - - - -
Faulconbridge (St Georges Crescent) - 0.4 0.6 - - 0.8 2.0 5.0 - 1.6 1.0 3.6 2.4 - - 34.2 29.2 9.2 4.8 7.4 - - - 19.8 11.6 0.8 - - - - -
Gears (Wyong River) - - - - - - 9.0 - - - - - - - - - 2.0 22.0 2.0 2.0 2.0 - - - - - 5.0 - 7.0 - -
Gosford AWS - - 0.2 - - - 17.0 - - 2.4 0.2 0.4 1.0 - - - 29.8 39.4 20.2 0.2 2.4 - - 12.4 - - - - - - -
Holsworthy Aerodrome AWS - - - - -

5.2 - - 0.2 0.2 1.0 - - 12.2 23.8 13.6 3.0 1.6 16.2 - - - 2.8 - - - - - -
Holsworthy Defence AWS - - - - - - 0.4 0.4 - - 0.2 0.4 5.2 - - 11.2 25.0 18.2 5.0 0.6 21.0 - - 3.0 3.2 - - - - - -
Hornsby (Swimming Pool) - 0.8 - - - - 2.2 2.2 0.4 - 0.2 0.2 4.4 - - 0.4 19.8 37.8 15.0 0.2 1.2 - - 6.2 1.4 - - - 1.0 - -
Horsley Park Equestrian Centre AWS - - - -
- 0.4 4.4 - - 0.4 1.6 1.2 - - 4.8 8.8 4.6 4.0 0.8 - - - 1.2 0.6 0.2 0.4 - 0.4 0.2 -
Katoomba (Farnells Rd) - 0.9 0.6 - - 0.6 2.8 10.8 0.4 0.8 1.0 2.8 2.6 0.4 - 15.6 37.0 10.8 17.2 8.2 - - 4.2 9.0 0.6 0.4 0.4 - - -
Kurrajong Heights (Bells Line of Road) - 1.0 0.8 - - 0.3 5.8 9.4 0.3 1.8 1.4 3.4 3.4 - - - 32.2 4.2 6.8 7.0 0.2 - - - 8.8 - 2.0 - 2.4 -
Lucas Heights (ANSTO) - - - - - - 1.4 9.8 - - 0.4 0.6 2.2 - - 9.7 33.0 24.0 3.4 0.4 13.0 - - - 5.2





Mangrove Mountain AWS






0.2 - 0.2 0.4 1.2 0.4 - - - 0.2 22.8 6.6 3.0 - - - 4.4






Marrickville Golf Club - - - - - - 2.0 1.0 - - - - - - - 5.0 34.0 18.0 3.0 1.0 - - - 1.0 1.0 - - - - - -
Menangle Bridge (Nepean River) - - - - - - 1.0 1.0 - - - - 7.0 - - 9.0 12.0 6.0 2.0 3.0 16.0 - - - 4.0 - 12.0 - - - -
Milperra Bridge (Georges River) - - - - - - - 9.0 - - - 1.0 - - - 4.0 20.0 11.0 3.0 1.0 - - - 1.0 2.0 - - - - - -
Mona Vale Golf Club - - - - - - 3.4 1.2 - 1.6 0.4 - 2.4 - 0.2 - 0.6 63.2 6.0 0.4 13.0 - - 2.6 8.4 - - - - - -
Mount Annan (Australian Botanic Garden) - - - - - - 1.2 7.2 - - 0.2 0.4 6.6 - - 10.8 24.4 8.0 2.8 3.4 18.4 - - - 6.6 - - - - - -
Mount Boyce AWS - 0.4 0.4 - - 1.8 3.8 1.2 0.2 2.6 0.8 5.2 4.4 - - 19.6 8.8 4.4 6.4 19.2 0.6 - - 12.6 1.6 0.2 1.4 3.2 0.4 - -
Mount Wilson (Clarine) 0.8 0.6 - - - 1.4 3.0 3.2 0.4 2.0 1.0 5.0 6.8 - - 9.6 9.0 8.6 6.6 19.0 - - - - 4.4 0.4 - - 0.4 - -
Norah Head AWS - - - - - - 4.6 - - 0.2 0.2 0.8 - - - - - 25.0 1.0 0.4 3.8 - - - - - - - - - -
North Parramatta (Burnside Homes) - - - - - - 4.0 - - - - - 1.0 - - 3.0 23.0 15.0 5.0 - - - - 1.5 5.0 - 5.5 - - - -
North Rocks (Muirfield Golf Club) - - - - - - 2.5 4.0 - - - 0.5 2.0 - - 4.0 20.0 13.0 7.0 0.5 - - - 2.0 1.5 - 4.0 - - - -
North Ryde Golf Club - - - - - - 4.0 1.0 - - - - 1.0 - - 2.0 16.0 32.0 3.0 - - - - 1.0 1.0 - - - - - -
Palm Grove (Lyrebird Lane) - 1.0 2.0 - - - 12.0 - - 1.0 - - 1.0 - - - 2.0 60.0 7.0 1.0 2.0 - - 1.0 - - - - 3.0 - -
Parramatta North (Masons Drive) - - - - - - 4.2 0.4 - - 0.4 0.2 1.2 - - 3.4 24.0 14.0 5.6 0.4 0.2 - - 2.2 5.2 - 5.6 - - - -
Peakhurst Golf Club - - - - - - 2.0 6.0 - - - - 3.0 - - 11.0 43.0 14.0 4.0 - 9.0 - - 2.0 4.0 - - - - - -
Pennant Hills (Yarrara Road) - 0.8 - - - - 5.4 3.4 0.4 - 1.8 - - 0.2 5.0 32.6 - - - - 8.0 - - - 0.4 - -
Penrith Lakes AWS - - - - - - - 0.4 - 0.2 0.4 0.4 0.2 - - 18.8 24.6 7.0 5.4 4.6 0.2 - - 13.4 3.0 - 3.0 - 0.4 - -
Picton Council Depot - - - - - - - - - - - - - - - - 24.6 - - - 20.4 8.0 4.0 - - - - - - -
Prospect Reservoir - - - - - - - 1.0 - - 1.0 3.0 1.0 - - 7.0 4.0 5.0 5.0 1.0 - - - 2.0 4.0 - 2.0 - - - -
Putty (The Gibba) - - - - - - 7.0 4.0 1.0 - - - - - - - 34.0 - 6.0 1.0 - - - 1.0 1.0 - 8.0 9.0 3.0 - -
Randwick (Randwick St) - 0.1 - - - - 1.4 0.6 - - - - 0.8 - - 2.0 6.2 37.0 6.4 0.1 3.8 - - 0.1 1.2 0.1 -



Richmond RAAF - - - - - 0.2 6.6 2.6 - - 0.4 1.0 1.6 0.4 - 4.0 15.0 1.8 3.4 0.6 - - - 1.4 1.0 - - - 0.4 - -
Rose Bay (Royal Sydney Golf Club) - - - - - 0.2 3.0 2.0 - - - - 3.4 - - 0.8 7.8 32.0 6.0 - 1.6 - - - 0.8 - - - - - -
Rossmore (South Creek) - - - - - - - 3.0 - - - - 3.0 - - 10.0 10.0 12.0 4.0 2.0 7.0 - - 2.0 1.0 - - - - - -
Sans Souci (Public School) - - - - - - 2.0 2.0 - - - - - - - 9.0 26.0 13.0 3.0 - 6.0 - - 1.0 2.0 - - - - - -
Seven Hills (Radio FM 103.2) - - - - - - 1.0 1.0 - - 0.5 1.5 - - - 4.0 6.5 4.5 5.5 0.5 0.5 - - 4.5 3.5 - 1.5 - - - -
Shanes Park (South Creek Road) - - - - - - 3.2 3.6 - - 0.6 1.0 - - - 13.2 12.6 6.2 8.2 2.2 - - - 10.2 2.6 - - - 2.0 - -
Springwood (Valley Heights) - - - - - 0.2 0.6 2.4 - 0.8 0.6 0.4 2.2 - - 39.6 14.0 8.8 4.4 6.2 0.2 - - 8.4 9.2 - 0.2 - 1.0 - -
St Ives (Richmond Avenue) - 1.2 0.6 - - - 5.0 0.6 0.6 - 0.6 0.2 4.2

















Sydney (Observatory Hill) - - - - - - 2.6 2.8 0.2 0.2 0.2 - 0.4 0.2 - 0.6 24.6 30.6 4.4 - 2.6 0.2 - - 1.6 0.2 - - - - -
Sydney Airport AMO - - - - - - 1.4 1.2 - - - - 0.8 0.2 - 3.2 31.6 14.0 3.4 - 2.4 - - - 1.0 0.2 - 0.2 - - -
Sydney Botanic Gardens - 0.2 - - - 0.5 3.0 2.4 - 0.4 0.1 0.1 0.4 - - 1.0 14.4 31.0 5.0 - 3.4 - - 1.4 0.6 0.1 0.4 - - - -
Sydney Olympic Park AWS (Archery Centre) - - - - - - 4.6 0.2 - - 0.2 0.4 1.4 - - 5.8 16.4 20.6 2.0 - 0.2 - - 0.8 4.0 - 9.4 - - - -
Terrey Hills AWS - 0.8 0.6 - - - 16.6 0.6 0.2 0.4 0.4 0.2 2.8 - - - 43.8 35.4 10.6 0.4 7.8 - - 0.2 4.4 0.2 0.2 - - - -
Wahroonga (Ada Avenue) - 1.4 - - - - 3.4 1.6 0.6 0.2 0.6 0.8 5.0 - - 0.8 31.2 31.6 10.4 0.2 1.0 - - 4.4 3.2 - - - 0.8 - -
Warragamba - - - - - - - 2.0 - - - 2.0 7.0 - - 12.0 27.0 13.0 2.0 3.0 6.0 - - 1.0 8.0 - - - - - -
Wedderburn (Booalbyn) - - - - - - 1.0 - - - - - 4.0 - - 12.0 26.0 9.0 3.0 3.0 15.0 - - 1.0 6.0 - 4.0 - - - -
Wyong (Mount Elliot) - - 1.0 - - - 18.0 - 1.0 3.0 - - - - - - - 32.0 19.0 - 8.0 - - 1.0 - 1.0 - - 10.0 - -
Wyong (Olney Forest) - 3.0 1.0 - - - 7.0 - 3.0 - - 1.0 2.0 - - - - 46.0 6.0 6.0 - - - 1.0 - 1.0 5.0 - 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 7 am on Monday 3 February 2020. 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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