Perth in February 2013: A hot dry February

This statement was prepared before all data for the period were available. This may affect some of the statistics presented.
  • Rainfall: below average
  • Maximum temperature: Very much above average
  • Minimum temperature: average to above average

Rainfall

Rainfall across the Perth metropolitan area during February 2013 was below average with monthly rainfall totals generally between 1 and 3 mm.

The first 20 days of February 2013 saw the continuation of a dry-spell across the Perth region which started on 17 January. This 34 day period with no measurable rainfall was brought to an end by a middle level disturbance that brought showers and thunderstorms to the Perth metropolitan area late on the 20th and into the 21st, whilst a weak cold front moved through the region on the afternoon of the 22nd bringing further showers. Daily falls during these events were generally less than 2 mm. No rainfall was observed in the last few days of the month.

Perth Metro recorded 0.8 mm of rainfall on 2 rain days in February 2013, well below the long-term average of 12.7 mm. The highest daily rainfall at Perth Metro during February 2013 was 0.6 mm in the 24 hours to 9 am on the 23rd. Last February (2012) Perth Metro received 23.6 mm in 3 rain days.

Maximum temperature

Mean maximum temperatures in February 2013 across the Perth metropolitan area were very much above average. Mean maxima were close to 30 °C on the offshore islands, increasing to the low-to-mid thirties on the coastal plain and in the hills.

February 2013 began with warm to hot days up to the 3rd, with daily maximum temperatures in the mid-to-high thirties at most sites, and a maximum of 40.5 °C reported at Pearce RAAF on the 3rd. Mild to warm days occurred from the 4th to 7th, followed by a run of generally hot days from the 8th to 13th with daily maximum temperatures over 35 °C for most sites. The 12th was one of the hottest days of the month with daily maxima over 40 °C for most sites on the coastal plain, and a maximum temperature of 42.5 °C at Gosnells City was the second highest temperature recorded in the Perth metropolitan area in February 2013. Two very hot days with daily maxima in the high thirties and low forties occurred on the 20th and 21st, with a maximum temperature of 43.2 °C recorded at Pearce RAAF on the 21st being the highest temperature of the month in the Perth area. A cooler change was observed between the 22nd and 24th with daily maxima dropping to the mid-to-high twenties for most sites. The 23rd was the mildest day for the month at all metropolitan sites as Bickley recorded the lowest maximum for February 2013 with 23.3 °C. Warm to hot days returned for most sites in the last four days of February.

Perth Metro's mean daily maximum temperature was 34.1°C, which is 2.7 °C above the average of 31.4 °C, and the 4th hottest February at Perth Metro since records commenced in 1897. The hottest February on record was February 1985 with a mean maximum temperature of 35.1 °C. Daily maxima at Perth Metro ranged from a very hot 40.5 °C on the 12th and 21st, to a mild 24.8 °C on the 23rd.

Minimum temperature

Mean minimum temperatures in February 2013 were near average to above average across the Perth metropolitan area, with mean minima generally in the mid-teens in the hills, the high teens on the coastal plain, and near 20 °C on the offshore islands.

For most sites in the Perth Metropolitan area, nights were cool to mild between the 1st and 10th, though one or two warm nights with minima in the low twenties were observed at some sites. Warm to hot nights were recorded between the 11th and 17th for many sites, with the 12th being the hottest night of the month at most locations across the Perth area. Pearce RAAF recorded a minimum of 28.6 °C on the 12th, the highest minimum temperature of the month in the Perth region. Cool to mild nights followed on the18th and 19th with a number of sites recording their coolest night of February 2013 on the 18th. Warm to hot nights returned on the 20th to 22th, followed again by cool to mild nights on the 23rd and 24th. A few sites recorded their coolest night of the month on the 24th, and Jandakot Aerodrome recorded a minimum of 8.9 °C on the 24th, the lowest minimum in the Perth metropolitan area in February 2013. Mild to warm nights were observed in Perth for the remainder of the month from the 25th.

Perth Metro's mean daily minimum temperature in February 2013 was 19.4 °C, which is above the average of 18.3 °C. Daily minima ranged from a mild 12.9 °C on the 24th to a very warm 25.2 °C on the 21st.

Sunshine

The mean daily sunshine hours for February 2013 was 11.0 hours, which is equal to the long-term average.

 

Further information

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Extremes in February 2013
Hottest day 43.2 °C at Pearce RAAF on the 21st
Warmest days on average 36.4 °C at Gosnells City
Coolest days on average 29.8 °C at Rottnest Island
32.7 °C at Bickley
Coldest day 23.3 °C at Bickley on the 23rd
Coldest night 8.9 °C at Jandakot Aero on the 24th
Coolest nights on average 16.5 °C at Bickley
Warmest nights on average 20.5 °C at Rottnest Island
19.7 °C at Swanbourne
Warmest night 28.6 °C at Pearce RAAF on the 12th
Wettest overall 3.0 mm at Rottnest Island
2.8 mm at Medina Research Centre
Wettest day 2.8 mm at Rottnest Island on the 21st
2.4 mm at Pearce RAAF on the 21st
Highest wind gust 76 km/h at Champion Lakes on the 27th

Highest February mean daily maximum temperature
Mean daily maximum
temperature
for February 2013 (°C)
Previous warmest
for February
Years of record Average for
February
Gosnells City 36.4 35.9 in 2011 20 32.9

Summary statistics for February 2013
Maximum temperatures
for February
(°C)
Minimum temperatures
for February
(°C)
Rainfall
for February
(millimetres)
Mean for
February
2013
Diff
from
average
Highest for
February
2013
Mean for
February
2013
Diff
from
average
Lowest for
February
2013
Total for
February
2013
Average
for
February
Rank of
February
2013
Fraction of
February
average
Bickley 32.7 +2.2 39.0 12th 16.5 +0.7 11.2 18th 1.4 19.7 low 7%
Champion Lakes 33.7   39.8 12th 19.6   13.6 24th 0.8
Garden Island HSF 30.1 +1.7 38.7 21st 20.0 +0.6 15.5 18th 0.8 8.8 low 9%
Gosnells City 36.4 +3.5 42.5 12th 19.9 +1.2 13.7 18th 1.2 15.2 low 8%
Jandakot Aero 34.1 +2.6 41.3 12th 17.9 +0.9 8.9 24th 1.6 16.4 average 10%
Medina Research Centre 33.8 +2.4 41.7 12th 18.8 +1.2 11.5 24th 2.8 20.1 average 14%
Pearce RAAF 36.0 +2.8 43.2 21st 18.4 +0.9 9.4 24th 2.4 12.1 average 20%
Perth Airport 34.7 +2.8 41.1 21st 18.6 +1.1 10.1 24th 1.0 14.4 low 7%
Perth Metro 34.1 +2.7 40.5 21st 19.4 +1.2 12.9 24th 0.8 12.7 low 6%
Rottnest Island 29.8 +2.6 38.5 21st 20.5 +1.0 15.9 18th 3.0 11.5 average 26%
Swanbourne 33.4 +3.0 40.9 20th 19.7 +1.1 13.7 18th 1.4 6.9 average 20%

Daily maximum temperature
Central Coast (09)12345678910111213141516171819202122232425262728
Bickley33.435.736.530.932.229.130.033.535.135.735.739.038.829.934.934.325.426.931.837.438.425.423.328.034.335.031.9
Champion Lakes35.537.036.731.132.629.629.634.637.137.738.939.837.429.736.733.826.728.939.239.126.224.128.135.636.833.4
Garden Island HSF30.633.934.626.026.823.824.626.935.236.233.938.729.225.127.728.224.526.529.638.138.726.023.424.529.235.535.6
Gosnells City35.539.039.234.531.030.437.038.539.540.242.539.839.035.530.139.141.226.037.838.034.5
Jandakot Aero36.437.237.630.432.829.028.233.538.238.939.841.337.528.734.632.827.330.034.539.840.927.224.528.337.038.035.2
Medina Research Centre35.638.938.029.732.628.527.533.538.738.940.041.735.328.134.032.528.029.835.040.541.326.524.227.435.638.0
Pearce RAAF36.939.640.534.834.631.932.537.039.040.338.341.141.832.737.837.129.130.735.940.743.228.726.931.037.737.735.8
Perth Airport36.238.239.232.233.730.430.734.938.239.139.041.139.329.435.833.728.029.935.140.341.127.224.928.437.337.534.9
Perth Metro36.138.037.830.434.329.329.234.238.238.839.540.537.629.634.233.526.929.834.740.140.526.724.828.136.037.434.8
Rottnest Island30.735.432.325.629.825.124.525.929.636.237.837.330.726.526.829.425.724.828.038.038.526.723.824.627.729.333.6
Swanbourne37.136.336.627.630.227.628.639.840.537.740.230.928.931.630.627.030.934.940.940.427.324.527.536.238.236.5

This table is very wide; you may have to scroll sideways to see all the days, and you may need to set the paper to 'landscape' to print.
The temperatures in this table are coloured by
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 difference from average


Daily minimum temperature
Central Coast (09)12345678910111213141516171819202122232425262728
Bickley13.117.319.316.716.014.113.615.015.115.018.421.921.719.916.618.417.211.212.617.522.220.111.511.614.818.516.815.5
Champion Lakes17.321.220.218.317.216.517.118.818.719.222.826.426.321.420.321.618.714.216.725.122.314.713.618.721.920.619.6
Garden Island HSF18.419.617.121.519.417.517.118.819.420.323.624.122.522.920.321.821.615.516.921.023.922.417.915.818.922.120.720.3
Gosnells City17.422.520.020.017.017.418.619.019.023.527.626.322.820.421.518.513.716.814.514.022.519.519.6
Jandakot Aero17.017.415.916.113.615.915.413.216.919.122.526.122.120.418.317.918.312.316.121.123.022.212.48.917.722.120.219.4
Medina Research Centre17.217.516.716.615.216.015.117.018.819.423.226.223.921.618.820.524.212.616.520.124.022.312.811.518.221.820.6
Pearce RAAF18.417.514.217.512.415.714.513.917.920.524.928.620.119.818.617.319.413.916.922.826.322.111.79.416.722.320.420.6
Perth Airport17.117.715.819.814.116.317.513.616.218.922.626.623.022.520.118.919.713.616.321.425.521.912.010.118.522.220.519.4
Perth Metro17.318.717.220.217.217.317.117.219.319.322.424.421.223.220.120.320.614.616.421.125.223.015.612.918.722.020.419.2
Rottnest Island18.821.421.020.320.218.117.719.620.220.724.225.322.422.020.821.620.815.917.321.523.621.717.917.919.222.320.920.3
Swanbourne18.520.219.620.817.316.516.117.719.919.824.026.521.322.619.120.321.113.716.721.822.722.216.214.518.822.420.919.6

This table is very wide; you may have to scroll sideways to see all the days, and you may need to set the paper to 'landscape' to print.
The temperatures in this table are coloured by
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 difference from average


Daily rainfall
Central Coast (09)12345678910111213141516171819202122232425262728
Bickley - - - - - - - - - - - - - - - - - - - - - - 1.4 - - - - -
Champion Lakes - - - - - - - - - - - - - - - - - - - - 0.4 0.2 - 0.2 - - - -
Garden Island HSF - - - - - - - - - - - - - - - - - - - - 0.6 0.2 - - - - - -
Gosnells City - - - - - - - - - - - - - - - - - - - »» 0.8 »» 0.4 -
- - -
Jandakot Aero - - - - - - - - - - - - - - - - - - - - 1.0 - 0.6 - - - - -
Jarrahdale - - - - - - - - - - - - - - - - - - - - 0.6 - 2.0 - - - - -
Medina Research Centre - - - - - - - - - - - - - - - - - - - - 1.2 - »» »» 1.6 - -
Pearce RAAF - - - - - - - - - - - - - - - - - - - - 2.4 - - - - - - -
Perth Airport - - - - - - - - - - - - - - - - - - - - 0.2 0.2 0.6 - - - - -
Perth Metro - - - - - - - - - - - - - - - - - - - - 0.2 - 0.6 - - - - -
Roleystone - - - - - - - - - - - - - - - - - - - - 0.4 - 1.0




Rottnest Island - - - - - - - - - - - - - - - - - - - - 2.8 - 0.2 - - - - -
Serpentine - - - - - - - - - - - - - - - - - - - - 0.6 0.2 0.8 - - - - -
Swanbourne - - - - - - - - - - - - - - - - - - - - 1.0 - 0.4 - - - - -

Most values are the precipitation in the 24 hours to 9 am on the day indicated. Days marked with »» are part of a longer accumulation, which is marked like this 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).
This table is very wide; you may have to scroll sideways to see all the days, and you may need to set the paper to 'landscape' to print.


Notes

This statement was prepared before all data for the period were available. This may affect some of the statistics presented.

A Monthly Climate Summary is prepared to list 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. Later information, including data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review, usually published in the fourth week of the month.

This statement has been prepared based on information available at 10 am on Thursday 28 February 2013. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Averages 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.

The ACORN-SAT dataset is being used for temperature area averages from December 2012 onwards. The major change from earlier datasets is that the ACORN-SAT dataset commences in 1910, rather than 1950, and hence rankings are calculated using a larger set of years.

Further information

Media
(03) 9669 4057
Enquiries