Greater Perth in April 2024

Rainfall

  • April rainfall was below average across Greater Perth; monthly rainfall totals were less than 5 mm at most sies.
  • Monthly rainfall totals generally ranged from 1% of average for April at Rottnest Island to 33% of average at Pearce RAAF; monthly totals for Karnet and Perth Airport were equal to their averages for April.
  • Perth Metro recorded 1.2 mm in April, which was only 3% of its long-tern average of 35.9 mm.

Temperature

Perth Metro

  • Total rainfall for Perth Metro was 1.2 mm, which is 3% of the long-term average of 35.9 mm.
  • The mean daily maximum temperature for Perth Metro was 28.2 °C, which is 2.3 °C above the long-term average of 25.9 °C.
  • The warmest day was 36.5 °C on the 7th, and the coolest day was on the 30th when the temperature reached 20.0 °C.
  • The mean daily minimum temperature for Perth Metro was 14.4 °C, which is 0.6 °C above the long-term average of 13.8 °C.
  • The coldest morning was 9.9 °C on the 21st, and the warmest morning was on the 17th when the minimum temperature was 18.3 °C.

Extremes in April 2024
Hottest day 37.7 °C at Pearce RAAF on the 7th
Warmest days on average 28.9 °C at Millendon (Swan Valley)
28.9 °C at Pearce RAAF
28.9 °C at Perth Airport
Coolest days on average 25.7 °C at Bickley
Coldest day 15.6 °C at Bickley on the 30th
Coldest night 7.7 °C at Perth Airport on the 23rd
7.7 °C at Jandakot Aero on the 27th
Coolest nights on average 12.6 °C at Bickley
Warmest nights on average 17.5 °C at Rottnest Island
Warmest night 21.4 °C at Pearce RAAF on the 18th
Warmest on average overall 22.2 °C at Pearce RAAF
Coolest on average overall 19.1 °C at Bickley
Wettest overall 36.0 mm at Tamala Park (Mindarie)
Wettest day 36.0 mm at Tamala Park (Mindarie) on the 13th
Strongest wind gust 81 km/h at Perth Airport on the 7th

Record highest April mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Swanbourne 27.9 = 27.9 in 2013 30 25.2
Garden Island HSF 27.6 26.0 in 2011 22 23.8
Mandurah 26.8 26.0 in 2009 22 24.1

Highest April mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
April
Jandakot Aero 28.2 28.4 in 1999 25.7
Perth Airport 28.9 29.0 in 1999 25.7
Rottnest Island 25.8 26.0 in 1999 23.7



Summary statistics for April 2024
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
April
2024
Diff
from
average
Highest for
April
2024
Mean for
April
2024
Diff
from
average
Lowest for
April
2024
Total for
April
2024
Average
for
April
Rank of
April
2024
Fraction of
April
average
Bickley 25.7 +2.2 33.8 7th 12.6 0.0 7.8 23rd 4.0 54.5 v low 7%
Garden Island HSF 27.6 +3.8 36.1 7th 16.0 0.0 11.6 27th 1.0 36.8 v low 3%
Jandakot Aero 28.2 +2.5 36.5 7th 14.1 +1.6 7.7 27th 9.2 40.9 low 22%
Karnet 25.8 +2.5 33.2 6th 13.2 +1.4 8.2 23rd 0 63.7 lowest 0%
Mandurah 26.8 +2.7 32.7 7th 16.4 +0.6 11.8 23rd 0.8 38.2 v low 2%
Millendon (Swan Valley) 28.9   37.2 7th 14.8   8.6 27th 0
Pearce RAAF 28.9 +2.4 37.7 7th 15.5 +2.2 8.3 22nd 11.2 33.6 low 33%
Perth Airport 28.9 +3.2 37.1 7th 14.4 +1.4 7.7 23rd 0 39.4 lowest 0%
Perth Metro 28.2 +2.3 36.5 7th 14.4 +0.6 9.9 21st 1.2 35.9 v low 3%
Rottnest Island 25.8 +2.1 32.9 5th 17.5 +0.2 13.2 23rd 0.4 32.6 v low 1%
Swanbourne 27.9 +2.7 36.7 7th 16.0 +0.8 11.1 23rd 1.2 38.6 v low 3%

Daily maximum temperatures for April 2024
123456789101112131415161718192021222324252627282930
Bickley24.727.027.528.131.132.833.825.724.825.425.426.424.725.126.227.930.030.427.628.528.620.419.121.019.825.221.523.222.815.6
Garden Island HSF26.726.630.630.131.830.236.130.128.929.028.928.424.422.826.931.033.132.829.528.828.121.722.725.022.526.623.222.526.322.5
Jandakot Aero27.629.429.930.833.335.036.529.227.428.228.128.026.626.528.930.532.633.430.031.131.022.521.823.922.727.023.225.625.820.2
Karnet25.026.529.928.031.533.231.025.823.925.525.026.024.426.026.128.229.531.031.029.119.019.520.820.026.021.523.122.918.9
Mandurah27.427.629.327.429.632.532.728.027.127.727.427.624.924.727.930.332.029.726.927.025.321.621.923.222.525.623.923.825.421.7
Millendon (Swan Valley)28.130.430.131.034.136.037.229.727.928.228.828.927.627.729.330.933.233.430.832.032.224.422.123.722.528.624.825.826.420.1
Pearce RAAF28.330.230.530.734.336.337.729.928.328.428.928.527.727.829.031.133.033.630.531.532.225.122.023.822.228.825.125.126.319.1
Perth Airport28.030.330.531.434.636.137.129.228.228.528.828.228.528.029.431.333.233.730.831.731.424.222.223.822.928.424.526.226.219.7
Perth Metro27.629.529.830.633.634.536.529.227.428.128.526.426.726.628.830.832.633.230.031.031.123.322.423.522.827.423.625.725.820.0
Rottnest Island24.024.127.928.232.930.827.827.526.426.426.324.723.823.625.627.330.931.327.628.726.921.120.722.820.625.423.422.224.820.2
Swanbourne27.326.230.830.532.833.536.729.528.428.928.827.724.924.528.431.133.033.829.728.928.923.321.924.222.427.223.224.026.219.8
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 April 2024
123456789101112131415161718192021222324252627282930
Bickley11.310.810.413.213.817.416.413.810.811.611.812.112.013.213.013.914.614.713.213.014.513.37.810.39.911.912.812.610.012.6
Garden Island HSF15.315.015.218.215.018.116.017.015.816.617.116.316.614.515.717.019.519.518.712.313.218.514.415.316.911.613.715.017.4
Jandakot Aero14.914.113.517.516.215.417.116.914.715.216.315.514.09.413.315.318.718.413.110.28.712.110.913.814.715.67.78.513.816.7
Karnet12.111.212.015.116.017.617.214.012.012.713.115.913.511.813.515.116.017.014.011.214.58.211.011.314.08.79.511.414.3
Mandurah14.814.414.918.218.320.120.816.715.315.816.315.616.316.116.717.419.220.519.616.215.318.011.813.813.415.613.514.014.417.5
Millendon (Swan Valley)15.414.514.716.918.013.716.517.614.715.916.415.916.610.813.117.519.219.319.913.410.08.711.214.314.815.88.68.713.517.0
Pearce RAAF15.414.315.518.119.616.213.817.615.316.817.516.416.711.213.118.520.621.419.017.914.48.311.614.515.016.58.39.214.417.0
Perth Airport14.914.314.316.917.513.620.017.014.615.615.815.916.08.312.117.718.518.515.915.610.011.37.713.913.915.58.08.713.716.7
Perth Metro15.014.314.216.216.115.916.817.114.615.416.015.715.010.713.315.418.317.713.311.79.914.711.613.813.613.711.110.713.716.9
Rottnest Island15.315.316.319.019.920.720.517.515.717.617.717.217.517.517.818.519.820.320.019.018.419.113.214.615.316.017.016.915.117.2
Swanbourne15.214.815.218.119.019.718.517.315.216.316.616.316.114.314.917.319.219.516.616.214.816.011.114.114.315.612.813.114.217.0
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 April 2024
123456789101112131415161718192021222324252627282930
Anketell - - - - - - - - - - - - 10.3 - - - - - - - - - - - - - - - - -
Araluen - - - - - - - - - - - - - - - - - - 6.0










Bickley - - - - - - - - - - - - 4.0 - - - - - - - - - - - - - - - - -
Bungendore - - - - - - - - - - - - 1.2 - - - - - - - - - - - - - - - - -
Chidlow - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Garden Island HSF - - - - - - - - - - - - 1.0 - - - - - - - - -

- - - - - -
Gidgegannup - - - - - - - - - - - - 0.6 - - - - - - 21.2 0.4 - - - - - - - - -
Huntly - - - - - - - - - - - - 0.8 - - - - - - - - - - - - - - - - -
Jandakot Aero - - - - - - - - - - - - 9.2 - - - - - - - - - - - - - - - - -
Jarrahdale - - - - - - - - - - - - 3.8 0.2 - - - - - - - - - - - - - - - -
Karnet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Karragullen North - - - - - - - - - - - - 1.2
















Maida Vale - - - - - - - - - - - - 0.4 - - - - - - - - - - - - - - - - -
Mandurah - - - - - - - - - - - - 0.8 - - - - - - - - - - - - - - - - -
Millendon (Swan Valley) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Mount Solus - - - - - - - - - - - - 0.4 - - - - - - - - - - - - - - - - -
Muchea - - - - - - - - - - - - 1.2 - - - - - - - - - - - - - - - - -
Mundaring - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Pearce RAAF - - - - - - - - - - - - 11.2 - - - - - - - - - - - - - - - - -
Perth Airport - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Perth Metro - - - - - - - - - - - - 1.2 - - - - - - - - - - - - - - - - -
Pinjarra Refinery - - - - - - - - - - - 0.9 - - - - - - - - - - - - - - - - - -
Pinjarra South - - - - - - - - - - - - 2.0 - - - - - - - - - - - - - - - - -
Roleystone - - - - - - - - - - - - 2.8 - - - - - - - - - - - - - - - - -
Rottnest Island - - - - - - - - - - - - 0.2 0.2 - - - - - - - - - - - - - - - -
Serpentine - - - - - - - - - - - - 3.6 - - - - - - - - - - - - - - - - -
Subiaco Treatment Plant - - - - - - - - - - - - 0.8 - - - - - - - - - - - - - - - - -
Swanbourne - - - - - - - - - - - - 1.0 - - - - - - - - - - - - - - 0.2 - -
Tamala Park (Mindarie) - - - - - - - - - - - - 36.0 - - - - - - - - - - - - - - - - -
Wanneroo - - - - - - - - - - - - 21.0 - - - - - - - - - - - - - - -
Werribee - - - - - - - - - - - - - - - - - - - - 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 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, usually published in the first week of the following month, lists the main features of the weather in Greater Perth using the most timely and accurate information available on the date of publication; it will generally not be updated.

This summary includes data from observing sites in or near the Greater Perth “Greater Capital City Statistical Area” (GCCSA). The Australian Bureau of Statistics designed the GCCSAs to represent a socio-economic definition of each capital city. This means the greater capital city boundary includes people who regularly socialise, shop or work within the capital city, but live in the small towns and rural areas surrounding the capital city. It does not define the built up edge of the capital city.

This statement has been prepared based on information available at 4 pm on Wednesday 1 May 2024. 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.

Information about Australian Indigenous seasonal calendars is available at the Indigenous Weather Knowledge website.


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