Greater Perth in May 2022:  Average rainfall

May rainfall was close to average at most sites across the Greater Perth, with about ten rain days registered between the 12th and 25th,. Mean maximum and minimum temperatures were generally near average.

Near average rainfall at most sites

  • May rainfall was generally near average, with monthly totals in the 70–110 mm, and to 140–180 mm in the Perth hills.
  • There were about 10 rain days, mostly registered between the 12th and 25th.
  • Cold fronts produced widespread moderate rainfall on the 12th, 23rd and 24th, with up to 50-60 mm daily totals recorded in the Perth hills on the 24th

Daytime and night-time temperatures close to average

  • Mean maximum temperatures were in the 20–22 °C range, which generally were less than half a degree above or below average.
  • The coldest day was on the 12th, with maximum temperatures were merely in low to mid-teens.
  • Mean minimum temperatures were in the 9–13 °C range, which generally were less than half a degree below average.
  • The coldest night was on the 30th, with minimum temperatures were generally 5 °C or lower.

Perth Metro

  • Total rainfall for Perth Metro was 83.6 mm, which is 95% of the long-term average of 88.4 mm
  • The mean daily maximum temperature for Perth Metro was 22.2 °C, which is 0.1 °C below the long-term average of 22.3 °C
  • The warmest day was 26.5 °C on the 8th, and the coolest day was on the 12th when the temperature reached 14.4 °C
  • The mean daily minimum temperature for Perth Metro was 10.3 °C, which is 0.2 °C below the long-term average of 10.5 °C
  • The coldest morning was 4.5 °C on the 30th, and the warmest morning was on the 20th when the minimum temperature was 15.0 °C

 

Further information

Media
(03) 9669 4057

Extremes in May 2022
Hottest day 28.0 °C at Pearce RAAF on the 9th
Warmest days on average 22.4 °C at Pearce RAAF
Coolest days on average 19.1 °C at Bickley
Coldest day 12.4 °C at Bickley on the 12th
Coldest night 2.8 °C at Jandakot Aero on the 30th
2.8 °C at Perth Airport on the 30th
Coolest nights on average 9.2 °C at Jandakot Aero
Warmest nights on average 14.9 °C at Rottnest Island
Warmest night 17.5 °C at Rottnest Island on the 18th
17.5 °C at Garden Island HSF on the 19th
Warmest on average overall 17.8 °C at Rottnest Island
Coolest on average overall 14.6 °C at Bickley
Wettest overall 181.8 mm at Huntly
Wettest day 58.4 mm at Bickley on the 24th
Strongest wind gust 102 km/h at Jandakot Aero on the 22nd
102 km/h at Rottnest Island on the 23rd

Summary statistics for May 2022
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
May
2022
Diff
from
average
Highest for
May
2022
Mean for
May
2022
Diff
from
average
Lowest for
May
2022
Total for
May
2022
Average
for
May
Rank of
May
2022
Fraction of
May
average
Bickley 19.1 -0.2 24.2 8th 10.1 0.0 6.5 29th 142.4 131.3 average 108%
Garden Island HSF 21.1 -0.3 25.3 21st 13.3 -0.6 9.2 30th 112.4 76.4 high 147%
Jandakot Aero 21.8 -0.2 25.7 21st 9.2 -0.1 2.8 30th 101.8 105.2 average 97%
Karnet 19.1 -0.1 24.1 8th     5.5 7th 98.1 139.8 average 70%
Mandurah 20.6 -0.5 24.9 21st 12.8 -0.6 8.6 30th 81.8 86.3 average 95%
Millendon (Swan Valley) 22.3   27.6 8th 9.7   3.4 30th 85.8
Pearce RAAF 22.4 +0.3 28.0 9th 10.5 -0.2 4.0 30th 93.8 83.2 average 113%
Perth Airport 22.2 +0.4 26.5 8th 10.0 -0.4 2.8 30th 72.8 97.5 average 75%
Perth Metro 22.2 -0.1 26.5 8th 10.3 -0.2 4.5 30th 83.6 88.4 average 95%
Rottnest Island 20.8 -0.3 24.3 7th 14.9 -0.3 11.3 30th 84.6 73.2 average 116%
Swanbourne 21.4 -0.8 25.6 21st 12.1 -0.4 7.0 30th 115.8 90.3 high 128%

Daily maximum temperatures for May 2022
12345678910111213141516171819202122232425262728293031
Bickley23.521.019.817.218.120.222.924.224.022.418.912.415.816.116.118.522.518.319.220.422.921.715.117.918.518.621.220.415.015.214.2
Garden Island HSF21.422.119.620.821.623.424.822.623.020.721.417.418.920.018.022.224.121.322.120.025.322.319.922.020.822.621.320.616.918.819.0
Gosnells City21.123.4
Jandakot Aero25.623.422.320.121.723.225.725.624.823.721.813.418.620.918.621.924.922.022.021.325.723.519.621.821.022.024.722.517.818.918.2
Karnet23.120.618.016.821.523.324.119.512.815.516.516.023.519.219.218.023.415.618.519.719.822.120.416.015.2
Mandurah24.022.520.119.620.922.123.023.122.422.620.214.918.619.617.520.421.620.221.718.424.921.319.321.020.621.922.920.817.018.517.9
Millendon (Swan Valley)26.424.022.920.921.623.426.227.626.624.923.213.119.420.620.522.125.321.722.323.425.924.119.521.820.522.124.523.118.018.417.7
Pearce RAAF27.124.522.920.721.424.126.427.928.024.923.213.319.721.220.322.225.322.322.022.225.724.919.822.320.522.024.023.418.417.517.4
Perth Airport26.024.222.920.321.523.126.426.525.923.922.213.419.120.919.422.125.622.022.422.326.224.019.521.821.122.524.822.918.418.518.2
Perth Metro26.023.522.620.321.723.426.426.525.823.522.214.418.721.019.521.825.721.923.022.325.824.219.922.121.922.624.922.917.718.718.2
Rottnest Island21.422.018.919.520.122.124.323.122.821.221.315.918.520.918.622.023.521.622.420.023.821.819.621.320.921.721.021.417.317.117.8
Swanbourne22.122.220.619.921.123.224.823.423.821.521.615.618.520.919.922.224.121.721.620.925.623.119.521.021.722.523.921.017.318.918.4
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 May 2022
12345678910111213141516171819202122232425262728293031
Bickley10.111.310.78.67.88.27.912.410.512.812.212.07.79.810.08.38.712.311.913.211.411.011.410.910.78.710.310.86.56.68.2
Garden Island HSF14.012.713.812.313.013.114.19.413.712.513.513.012.114.814.012.714.415.217.515.813.614.415.114.213.212.014.311.911.49.211.1
Gosnells City12.96.413.214.413.5
Jandakot Aero9.16.810.39.411.97.53.28.78.610.08.611.87.610.811.26.57.014.411.014.913.09.113.313.17.47.810.48.63.32.87.1
Karnet8.18.29.98.38.05.57.58.010.510.17.912.310.411.711.010.27.58.39.57.55.97.6
Mandurah13.512.513.212.411.611.711.113.812.613.313.711.611.214.713.911.913.515.514.615.513.714.914.213.211.811.113.212.79.88.610.7
Millendon (Swan Valley)8.67.012.610.712.210.17.06.47.29.08.512.18.411.89.97.18.213.69.514.214.08.813.413.08.59.112.412.55.03.46.9
Pearce RAAF9.47.213.111.412.412.210.47.07.39.07.812.49.612.010.99.312.814.110.014.414.611.413.713.47.79.714.513.85.24.05.7
Perth Airport8.37.213.210.611.27.610.67.37.99.48.812.07.910.811.58.612.014.09.914.113.210.913.313.27.910.913.613.33.72.85.8
Perth Metro9.49.112.911.510.39.06.18.69.610.810.812.19.712.812.68.08.314.311.315.013.910.413.413.09.49.311.911.55.44.55.7
Rottnest Island15.616.315.312.413.214.115.416.215.617.216.713.311.913.614.914.716.417.516.815.216.016.514.614.715.214.115.815.713.311.312.8
Swanbourne10.811.912.511.211.811.911.512.012.113.313.111.710.313.513.410.111.515.212.915.713.812.514.313.411.710.413.113.79.57.010.2
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 May 2022
12345678910111213141516171819202122232425262728293031
Anketell - - - - - - - - - - - 10.0 6.5 2.2 6.2 0.1 - 8.2 1.2 1.3 3.3 - 37.6 34.5 1.6 - - - - - -
Araluen - - - - - - - - - - - 9.0 8.2 1.2 - 7.0 - 11.0 1.0 - - - 41.0 46.0






Bickley
- - - - - - - - -
19.6 9.2 1.6 7.8
- 1.6 3.8 0.2 0.2 - 24.4 58.4 15.2 0.2 - - 0.2 - -
Bungendore - - 0.2 - - - - - - - 0.2 8.2 7.0 0.8 8.6 - - 9.2 0.4 1.0 0.4 - 37.2 35.2 3.0 - - - - 0.2 -
Chidlow - - - - - - - - - - - 13.0 14.7 0.9 3.6 - 2.2 0.5 - - 17.0 42.2 2.0





Garden Island HSF - - 0.2 - - - - - - 0.2 - 47.6 6.0 1.2 2.0 - - 10.2 0.8 6.2 2.2 - 16.0 16.2 3.4 - - - 0.2 - -
Gidgegannup - - - - - - - - - - - 13.8 15.0 1.2 4.6 0.2 - 2.4 9.2 4.2 - - 20.2 43.0 4.8 - 0.2 - - - -
Gosnells City -





-





3.2




3.0





- -

Huntly - - 0.8 - - - - - - - - 15.6 13.0 12.3 9.4 - - 15.6 3.0 6.0 4.0 - 37.0 57.0 7.5 - - - 0.6 - -
Jandakot Aero - - - - - - - - - - - 10.8 4.6 3.4 3.4 - - 6.6
2.8 1.4 - 29.6 33.0 6.0 0.2 - - - - -
Jarrahdale 0.2 0.2 0.6 0.2 - - - - 0.4 - 0.2 6.2 9.4 2.2 9.4 0.2 0.2 13.8 1.6 0.4 2.2 0.2 31.8 42.8 2.6 0.4 0.2 - 1.0 0.2 0.2
Karnet - - 0.8 - - - - - 8.8 4.0 11.8 - 13.6 4.4 1.2 2.4 - 50.1 0.2 0.4 - - 0.4 - -
Karragullen North - - - - - - - - - - - 12.8 8.2 2.0 11.0 - - 3.4 2.4 - - - 37.4 53.8 3.8





Maida Vale - - - - - - - - - - - 15.8 6.2 3.4 - - - 7.8 1.2 - - - 17.8 48.2 5.6





Mandurah - - - - - - - - - - - 21.6 8.8 0.2 4.4 - - 8.0 5.8 9.8 6.2 0.2 15.6
1.0 0.2 - - - - -
Millendon (Swan Valley) - - - - - - - - - - - 12.4 8.8 0.8 3.2 - -
1.0 0.4 - - 15.8 40.6 2.8 - - - - - -
Mount Solus - - 1.4 - - - - - - - 0.2 8.2 11.6 2.0 17.2 - 0.2 8.2 2.8 0.4 2.8 - 34.4 37.0 5.2 - - - 0.8 - -
Muchea - 0.2 - - - - - - - - - 13.4 17.4 1.4 1.0 0.2 - 6.0 1.6 0.8 - - 19.0 26.8 0.8 - - - - - -
Mundaring - - - - - - - - - - - 13.0 11.0 2.8 6.2 0.4 - 2.8 1.2 - - - 16.0 54.6 2.6





Pearce RAAF - - - - - - - - - - - 15.2 16.4 1.8 1.0 - - 4.0 8.6 1.4 - - 17.8 26.4 1.2 - - - - - -
Perth Airport - - - - - - - - - - - 12.4 5.0 1.2 0.6 - - 4.6 1.2 - 0.2 - 15.8 31.6 0.2 - - - - - -
Perth Metro - - - - - - - - - - - 10.6 5.8 0.6 2.0 - -
2.2 0.4 0.2 - 30.4 29.8 1.6 - - - - - -
Pinjarra South - - - - - - - - - - - 17.2 7.2 0.8 3.4 - - 13.6 17.2 1.8 2.6 - 28.4 20.4 2.0 0.2 - - 0.2 - -
Roleystone - - - - - - - - - - - 9.8 7.8 2.6 8.6 - - 22.4 0.8 - - - 36.4 56.2 1.6





Rottnest Island - - 0.4 - - - - - - - - 24.4 11.4 0.6 3.2 0.2 - 1.2 4.6 16.6 0.2 - 12.8 5.6 3.2 0.2 - - - - -
Serpentine - - - - - - - - - - - 7.4 8.0 1.0 5.2 - - 3.0 0.8 1.2 1.6 - 34.6 33.8 2.8 - - - - - -
Subiaco Treatment Plant - - - - - - - - - - - 12.4 8.2 1.6 1.0 - - 2.8 15.6 15.4 -









Swanbourne - - - - - - - - - - - 16.6 8.6 2.0 1.8 - - 3.0 16.0 16.0 - - 22.6 23.8 5.4 - - - - - -
Tamala Park (Mindarie) - - - - - - - - - - - 19.2 8.8 2.2 1.4 - - 3.8 1.2 3.8 - - 17.2 30.0 1.0 - - - - - -
Wanneroo - - - - - - - - - 41.2 - 3.2 0.8 2.8 69.0 1.8





Werribee - - - - - - - - - - - 8.6 15.4 0.8 2.4 - - 0.8 2.0 0.2 1.6 - 18.4 34.8 1.0 - 0.2 - - - -
Whiteman Park - - - - - - - - - - - 16.6 7.8 - - 8.2 - 4.0 - - - - - 67.0 2.2





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. 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 Perth “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 11 am on Wednesday 1 June 2022. 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.

Further information

Media
(03) 9669 4057

Climate