Perth in February 2017: Wettest February for decades

February 2017 was an unseasonally wet month in Perth with rainfall totals in the 80-140 mm range across the metropolitan area. It was the wettest February for at least 20 years for several sites, and the wettest for over 60 years for some sites including Perth Metro. Mean maximum temperatures were mostly 2-3 °C below average, and it was the mildest February for at least 20 years for many sites. Mean minimum temperatures were generally close to average.

Monthly rainfall well above average

  • Monthly rainfall totals were in the 80-140 mm range across Perth, and were more than five times higher than normal
  • Perth Metro's monthly total of 137.2 mm was the second-highest February rainfall total on record at the site and the wettest for 62 years, since the record high of 166.3 mm in February 1955, whilst Perth Metro's five rain days was the highest in February since six rain days were recorded in February 1992
  • Several sites in the Perth hills as well as near the coast had their highest total February rainfall on record; while many sites reported their wettest February for at least two decades
  • A cloudband associated with a tropical low to the north brought many record high February daily rainfalls to the Perth area on the 10th; Perth Metro's 114.4 mm was its second highest daily rainfall for any month, only behind 120.6 mm on 9 February 1992

Below average maximum temperatures; near average minimum temperatures

  • Mean maximum temperatures were mostly 2-3 °C below average and Bickley and Swanbourne registered their mildest February on record whilst some coastal plain sites recorded their coolest February for more than 20 years
  • Perth Metro recorded a mean maximum temperature of 30.1 °C, its mildest February in ten years, since 2007
  • Persistent rain and fresh southerly winds led to a cool to cold day across Perth on 9 February with daily maxima in the 13-18 °C range; several sites had their coldest February day on record
  • Perth Metro recorded a daily maximum temperature of 17.4 °C on the 9th, which was its lowest maximum temperature in February since daily temperature recordings commenced in 1897, exceeding the previous record of 19.0 °C on 17 February 1914
  • Bickley recorded a daily maximum of 13.7 °C on the 9th, the second lowest maximum temperature on record in February in WA, only behind a maximum of 13.3 °C at Mount Barker on 17 February 1914
  • Mean minimum temperatures were 0.2-0.7 °C below average across the metropolitan area
  • Perth Metro recorded a mean minimum of 17.7 °C, equalling with the mean minimum in February 2016

Further information

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Extremes in February 2017
Hottest day 39.5 °C at Gosnells City on the 25th
Warmest days on average 30.8 °C at Pearce RAAF
Coolest days on average 26.2 °C at Rottnest Island
27.5 °C at Bickley
Coldest day 13.7 °C at Bickley on the 9th
Coldest night 7.1 °C at Karnet on the 22nd
Coolest nights on average 15.1 °C at Karnet
Warmest nights on average 18.8 °C at Garden Island HSF
18.8 °C at Rottnest Island
18.4 °C at Gosnells City
Warmest night 25.9 °C at Gosnells City on the 25th
Warmest on average overall 24.0 °C at Pearce RAAF
Coolest on average overall 21.5 °C at Bickley
Wettest overall 150.8 mm at Gidgegannup
Driest overall 66.8 mm at Midland
Wettest day 124.0 mm at Hopelands on the 10th
Strongest wind gust 89 km/h at Rottnest Island on the 8th

Record highest February daily rainfall
New record
(mm)
Old
record
Years of
record
Wanneroo 78.8 on the 10th 34.8 on the 26th in 1915 75
Pearce RAAF 58.0 on the 10th 53.0 on the 22nd in 1986 63
Gidgegannup 67.2 on the 10th 38.6 on the 9th in 1992 59
Karnet 115.8 on the 10th 82.8 on the 22nd in 1986 54
Bickley 83.6 on the 10th 66.6 on the 21st in 1986 49
Mount Helena 64.2 on the 10th 42.0 on the 8th in 2008 31
Rottnest Island 93.8 on the 10th 29.0 on the 17th in 2003 25
Swanbourne 97.4 on the 10th 27.0 on the 8th in 2008 24



Record highest February total rainfall
New record
(mm)
Old
record
Years of
record
Average for
February
Wanneroo 167.8 93.6 in 1986 75 14.4
Pearce RAAF 98.6 97.0 in 1992 63 13.4
Gidgegannup 150.8 64.8 in 1970 59 11.9
Karnet 126.6 107.1 in 1986 53 21.6
Mount Helena 133.8 58.8 in 2008 31 16.2
Rottnest Island 104.0 50.2 in 2003 25 11.1
Swanbourne 141.8 49.0 in 2008 24 12.6

Highest February total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
February
Perth Metro 137.2 166.3 in 1955 12.5
Chidlow 129.2 206.0 in 1955* 16.4
Serpentine 129.2 190.2 in 1955* 12.9
Herne Hill 72.7 130.0 in 1955* 13.9
Bickley 104.4 122.2 in 1986 20.8
Mundaring 99.2 108.3 in 1986* 17.9
Pickering Brook 94.6 122.8 in 1986* 22.7
Gosnells City 103.6 129.2 in 1992 16.0
Medina Research Centre 115.3 246.5 in 1992 21.5
Perth Airport 79.8 150.4 in 1992 15.1
Roleystone 101.6 153.0 in 1992 18.6
Jandakot Aero 121.2 185.0 in 1992* 18.4
Karragullen North 106.2 124.5 in 1986* 17.0
Midland 66.8 75.4 in 1993 13.6
Jarrahdale 122.0 127.2 in 1992* 15.9

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




Record lowest February daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
February
Perth Airport 17.1 on the 9th 19.8 on the 25th in 1991 73 32.0
Pearce RAAF 17.5 on the 9th 18.8 on the 17th in 1981 57 33.3
Karnet 15.4 on the 9th 15.5 on the 25th in 1991 51 30.5
Medina Research Centre 18.2 on the 9th 19.2 on the 25th in 1991 32 31.5
Jandakot Aero 17.6 on the 9th 19.3 on the 25th in 1991 28 31.7
Rottnest Island 18.0 on the 9th 20.5 on the 15th in 1990 28 27.4
Gosnells City 18.0 on the 9th 22.0 on the 15th in 2006 25 33.1
Bickley 13.7 on the 9th 18.0 on the 15th in 2006 24 30.7
Swanbourne 17.1 on the 9th 21.2 on the 25th in 2009 24 30.7



Record lowest February mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
February
Bickley 27.5 27.8 in 1994 23 30.7
Swanbourne 28.4 28.9 in 2005 23 30.7

Lowest February mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
February
Karnet 28.4 27.0 in 1986* 30.5
Gosnells City 30.7 30.2 in 1992* 33.1
Jandakot Aero 29.9 29.5 in 1994 31.7
Pearce RAAF 30.8 30.0 in 1994 33.3
Perth Airport 30.3 30.2 in 1994 32.0

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




Lowest February mean temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
February
Bickley 21.5 20.9 in 1994 23.3
Pearce RAAF 24.0 23.1 in 1994 25.5
Perth Airport 23.7 23.5 in 1994 24.7

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




Summary statistics for February 2017
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
February
2017
Diff
from
average
Highest for
February
2017
Mean for
February
2017
Diff
from
average
Lowest for
February
2017
Total for
February
2017
Average
for
February
Rank of
February
2017
Fraction of
February
average
Bickley 27.5 -3.2 36.3 25th 15.5 -0.4 9.9 22nd 104.4 20.8 v high 502%
Garden Island HSF 26.8 -1.7 37.7 25th 18.8 -0.6 15.2 10th 126.8 16.3 v high 778%
Gosnells City 30.7 -2.4 39.5 25th 18.4 -0.4 10.9 22nd 103.6 16.0 v high 648%
Jandakot Aero 29.9 -1.8 38.8 25th 16.9 -0.2 7.8 22nd 121.2 18.4 v high 659%
Karnet 28.4 -2.1 35.9 25th 15.1 -0.7 7.1 22nd 126.6 21.6 highest 586%
Pearce RAAF 30.8 -2.5 38.9 25th 17.2 -0.4 8.6 22nd 98.6 13.4 highest 736%
Perth Airport 30.3 -1.7 39.0 25th 17.2 -0.3 7.8 22nd 79.8 15.1 v high 528%
Perth Metro 30.1 -1.6 39.3 25th 17.7 -0.6 10.1 22nd 137.2 12.5 highest 1098%
Rottnest Island 26.2 -1.2 37.1 25th 18.8 -0.7 14.9 10th 104.0 11.1 highest 937%
Swanbourne 28.4 -2.3 38.3 25th 18.1 -0.6 12.0 22nd 141.8 12.6 highest 1125%
Note: Observations for “Perth Metro” are taken from the current site at Mount Lawley (Bureau number 009225).
Comparisons are made against combined data from the current site (which opened in early 1993) and the previous site at Perth Regional Office (009034), which ran from 1876 to early 1992.

Daily maximum temperatures for February 2017
12345678910111213141516171819202122232425262728
Bickley26.327.931.028.727.030.623.413.717.320.323.830.029.728.229.028.731.134.626.419.822.729.733.336.329.830.432.9
Garden Island HSF27.430.924.922.827.730.322.226.418.322.125.728.630.824.726.223.831.535.235.721.920.421.026.334.937.723.323.825.8
Gosnells City31.032.534.530.030.934.129.427.018.021.425.727.934.831.232.532.536.238.827.622.525.132.236.639.530.631.634.2
Jandakot Aero30.831.932.528.330.934.029.027.017.621.626.328.333.130.331.130.532.634.737.426.322.523.730.136.438.829.929.832.3
Karnet30.130.432.330.027.531.126.823.515.422.824.829.730.626.828.529.031.534.925.819.230.033.535.929.329.9
Medina Research Centre31.232.831.026.531.635.027.227.618.221.526.528.234.230.731.729.533.535.538.025.021.630.1
Pearce RAAF29.532.435.030.730.634.230.727.017.522.625.529.133.431.532.732.032.135.037.728.723.525.332.536.338.930.632.235.3
Perth Airport30.231.733.629.430.233.829.626.717.121.324.827.934.230.532.331.332.234.838.427.223.124.732.136.439.030.230.533.8
Perth Metro30.331.832.627.630.434.130.326.617.422.426.228.334.030.732.430.832.435.137.726.422.124.130.636.539.329.429.833.0
Rottnest Island25.628.924.823.626.227.723.225.118.021.125.626.233.225.724.424.126.433.033.223.022.121.424.434.737.124.024.625.7
Swanbourne29.532.327.724.529.432.725.227.017.123.226.828.333.525.928.927.632.735.335.723.921.522.629.036.838.324.825.828.2
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 February 2017
12345678910111213141516171819202122232425262728
Bickley14.315.317.615.915.013.019.611.211.613.615.917.120.219.614.312.213.418.516.713.69.912.716.418.519.915.917.5
Garden Island HSF17.719.421.518.518.917.421.315.615.315.217.419.921.622.021.217.916.418.823.519.517.215.216.318.020.020.219.520.4
Gosnells City18.020.021.317.018.017.421.515.514.915.520.122.220.518.616.918.521.619.517.010.914.119.825.918.415.918.5
Jandakot Aero16.517.418.415.118.116.719.613.614.314.616.919.521.723.419.117.315.617.223.319.316.57.810.215.818.716.612.916.2
Karnet14.016.315.516.013.719.59.510.611.515.517.221.618.513.912.520.416.512.97.112.217.513.417.016.517.0
Medina Research Centre16.519.017.815.517.517.020.013.214.014.617.019.521.023.119.016.615.017.624.019.515.810.112.1
Pearce RAAF17.120.219.515.716.516.820.615.113.614.317.021.122.022.718.718.216.318.323.917.813.98.610.816.825.214.912.314.7
Perth Airport17.318.318.816.117.316.720.514.614.114.916.719.721.123.719.218.115.917.122.920.116.37.810.216.121.516.513.216.3
Perth Metro16.519.219.316.519.016.720.814.914.114.816.520.121.423.820.618.616.217.923.420.416.510.112.716.218.318.015.717.9
Rottnest Island17.020.020.218.419.117.620.315.415.514.917.320.021.021.220.118.317.219.022.319.016.216.617.320.123.419.519.620.5
Swanbourne17.019.620.116.917.917.220.414.413.914.416.320.121.822.019.918.516.518.523.919.916.112.014.018.222.318.416.718.6
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 February 2017
12345678910111213141516171819202122232425262728
Anketell 1.4 - - - - - - - 0.2 85.0 25.6 0.2 - 1.0 - - - - - - 1.0
Bickley 3.0 - - - - - - - 2.0 83.6 15.2 - 0.2 - - - - - - - 0.4 - - - - - - -
Bungendore 1.2 - - - - - - - 0.2 62.0 13.2 0.2 - - - - - - - - 3.2 - - 0.2 - - - -
Chidlow 13.0 - - - - - 8.4 - 10.4 73.4 9.8 1.0 12.2 - - - - - - 1.0






Garden Island HSF 0.6 - - - - - - - - 109 17.2 - - - - - - - - - - - - - - - - -
Gidgegannup 21.2 - - - - - 7.0 - 11.6 67.2 28.0 - 0.6 13.2 - - - - - - 2.0 - - - - - - -
Gosnells City - - - - - - - - 0.8 78.2 24.2 0.1 - - - - - - - - 0.3 - - - - - - -
Herne Hill - - - - - - 4.5 - 2.4 46.4 13.6 - 4.6 - - - - - - - 1.2






Hopelands 0.2 - - - - - - - 3.6 124

















Jandakot Aero 0.8 - - - - - - - 0.8 99.8 19.8 - - - - - - - - - - - - - - - - -
Jarrahdale 1.0 - - 0.2 - - - - - 103 16.2 0.2 - - - - - - - - 0.6 0.2 - 0.2 - - - 0.2
Karnet 0.2 - - - - - - - 0.2 116 9.0 0.1 - - - - - - - 1.1 0.2 - - - - - -
Karragullen North 2.6 - - - - - - - 1.0 79.4 19.4 0.2 2.4 - - - - - - - 1.2






Maida Vale 2.6 - - - - - - - 1.6 58.6 10.2 0.1 0.2 0.8 - - - - - - 1.0






Medina Research Centre 1.2 - - - - - - - 1.0 95.4 16.0 - - 0.4 0.1 - - - - - 1.2 - - -



Midland 4.4 - - - - - - - 1.1 53.0 7.6 0.1 - - - - - - 0.4 0.2 - - - - - -
Mount Helena 16.6




9.0
10.4 64.2 23.6 0.2 1.2 7.0





1.6






Mundaring 5.0 - - - - - 2.0 - 6.4 62.0 21.0 0.4 0.4 - - - - - - - 2.0






Pearce RAAF 29.6 - - - - - 0.4 - 4.2 58.0 4.8 - - 1.4 0.2 - - - - - - - - - - - - -
Perth Airport 1.8 - - - - - - - 2.0 66.6 8.6 - - 0.2 0.2 - - - - - 0.2 0.2 - - - - - -
Perth Metro 2.8 - - - - - - - 2.6 114 15.0 - - - - - - - - - 2.4 - - - - - - -
Pickering Brook 3.0






1.4 73.0 14.0

2.2





1.0






Roleystone 2.0 - - - - - - - 1.4 81.4 15.0 - 0.5 - - - - - - - 1.3






Rottnest Island 0.6 - - - - - - - - 93.8 9.0 - 0.2 - - - - - - - 0.4 - - - - - - -
Serpentine 1.0 - - - - - - - - 111 16.4 - - - - - - - - - 0.4 - - - - - - -
Swanbourne 1.4 - - - - - - - 2.0 97.4 36.4 - - - - - - - - - 4.6 - - - - - - -
Wanneroo 63.4* - - - - - - - 11.0 78.8 14.6 - - - - - - - -






Werribee 33.8 - - - - - 2.6 0.2 7.6 74.8 2.0 - - - - - - - - - 1.0 0.2 - - - - - -
Whiteman Park 4.2 - - - - - - - 4.6 82.6 10.8 - - - - - - - - - 0.6






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 Perth 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 statement has been prepared based on information available at 10 am on Wednesday 1 March 2017. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

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.

Observations for “Perth Metro” are taken from the current site at Mount Lawley (Bureau number 009225).
Comparisons are made against combined data from the current site (which opened in early 1993) and the previous site at Perth Regional Office (009034), which ran from 1876 to early 1992.

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

Media
(03) 9669 4057
Enquiries