Perth in March 2016: Warm nights with a wet Easter weekend

Mean minimum temperatures in March 2016 were generally 1-2 °C warmer than normal across the Perth Metropolitan area, while mean maximum temperatures were near average . Rainfall was above average for most sites, mostly as a result of isolated thunderstorms in the northern and eastern suburbs on the 19th and moderate falls from a cloudband of tropical origin over the Easter weekend from the 25th to 27th.

  • Near average maximum temperatures
  • Above average minimum temperatures
  • Above average rainfall
  • Wet Easter weekend

Rainfall in March 2016 was above average for most sites. Monthly rainfall totals were between 15 mm and 30 mm for much of the Perth Metropolitan area, and up to 60 mm in the hills, however northeastern sites saw thunderstorms on the 19th and some heavy falls over the Easter weekend, on the 25th to 27th, so monthly totals in these areas were closer to 100 mm. Pearce RAAF recorded its wettest March in 60 years of record as a result of these heavy falls, while Mount Helena and Gidgegannup had their wettest March for 26 years, since 1990. Perth Metro recorded 16.8 mm on three rain days, which is close to the long-term average.

Mean maximum temperatures were close to average across Perth, with mean maxima ranging from the mid-twenties to the low thirties. A mild to warm start to the month was followed by a period of daytime temperatures in the mid-to-high thirties, reaching the low-forties on the 13th and 14th for a number of coastal plain sites. Days were mostly mild to warm in the second half of the month. Perth Metro recorded a mean maximum temperature of 29.6 °C, which equals to the long-term average.

Mean minimum temperatures were generally 1-2 °C warmer than normal across the Perth area, with mean minima in the mid-to-high teens. Apart from a cool start and finish to the month, most nights were mild to warm, with a hot night for most sites overnight on the 13th and early on the 14th. Perth Metro recorded a mean minimum temperature of 17.9 °C, which was 1.3 °C above the long-term average, and the warmest March nights for five years. A daily minimum temperature of 26.0 °C on the 14th was the second highest March minimum temperature measured at the current Perth Metro site at Mount Lawley, only behind a minimum of 28.1 °C on 12 March 2010.

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Extremes in March 2016
Hottest day 40.9 °C at Medina Research Centre on the 14th
40.9 °C at Pearce RAAF on the 14th
Warmest days on average 31.1 °C at Pearce RAAF
Coolest days on average 26.4 °C at Rottnest Island
27.8 °C at Bickley
Coldest day 18.0 °C at Karnet on the 23rd
Coldest night 11.5 °C at Karnet on the 1st
Coolest nights on average 15.8 °C at Bickley
Warmest nights on average 19.4 °C at Rottnest Island
18.8 °C at Gosnells City
Warmest night 26.9 °C at Pearce RAAF on the 14th
Warmest on average overall 24.8 °C at Gosnells City
Coolest on average overall 21.8 °C at Bickley
Wettest overall 101.8 mm at Pearce RAAF
Driest overall 16.8 mm at Anketell
16.8 mm at Perth Metro
Wettest day 55.6 mm at Werribee on the 27th
Strongest wind gust 78 km/h at Rottnest Island on the 16th

Record highest March total rainfall
New record
(mm)
Old
record
Years of
record
Average for
March
Pearce RAAF 101.8 86.2 in 1990 61 16.5

Highest March total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
March
Mount Helena 91.8 107.8 in 1990 24.7
Gidgegannup 96.6 106.4 in 1990* 20.9

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




Summary statistics for March 2016
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
March
2016
Diff
from
average
Highest for
March
2016
Mean for
March
2016
Diff
from
average
Lowest for
March
2016
Total for
March
2016
Average
for
March
Rank of
March
2016
Fraction of
March
average
Bickley 27.8 -0.2 37.2 14th 15.8 +1.2 11.6 28th 48.0 25.9 high 185%
Garden Island HSF 26.7 -0.5 39.5 14th 19.1 +0.9 15.2 30th 21.8 15.2 high 143%
Gosnells City 30.9 +0.4 40.3 13th 18.8 +1.6 14.4 4th 24.8 16.9 high 147%
Jandakot Aero 29.6 -0.1 40.7 14th 17.0 +1.6 11.7 29th 18.6 16.2 high 115%
Pearce RAAF 31.1 +0.5 40.9 14th 17.1 +1.1 12.2 2nd 101.8 16.5 highest 617%
Perth Airport 30.0 +0.3 40.1 14th 17.5 +1.6 11.8 31st 19.8 16.3 high 121%
Perth Metro 29.6 0.0 39.8 14th 17.9 +1.3 12.7 29th 16.8 19.5 average 86%
Rottnest Island 26.4 +0.3 39.4 14th 19.4 +0.7 16.0 28th 24.0 14.3 high 168%
Swanbourne 28.1 -0.9 40.7 14th 18.5 +1.2 14.0 28th 26.6 21.6 high 123%
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 March 2016
12345678910111213141516171819202122232425262728293031
Bickley26.031.227.827.527.228.930.733.034.929.531.233.236.537.231.227.225.826.720.529.130.422.920.023.830.519.118.822.025.927.124.5
Garden Island HSF21.823.321.922.524.129.231.931.628.723.724.329.637.939.526.322.627.429.425.424.527.325.822.728.231.122.423.426.225.226.322.2
Gosnells City26.832.128.028.230.531.833.634.537.031.132.334.440.340.230.228.429.129.726.132.933.126.833.623.423.626.429.030.7
Jandakot Aero25.629.625.627.228.931.733.334.136.229.930.132.939.540.728.427.328.929.827.331.232.626.623.927.433.522.324.026.127.829.425.4
Karnet25.831.228.427.127.528.530.632.434.527.930.533.735.937.230.426.624.926.430.922.418.0
Medina Research Centre24.428.225.226.429.032.033.835.036.528.040.240.928.426.229.129.827.730.532.227.6
Pearce RAAF28.635.130.029.630.932.834.036.039.433.733.036.440.140.935.529.029.131.124.032.134.527.225.527.632.322.322.425.328.530.027.4
Perth Airport26.132.027.028.029.831.333.634.537.331.131.234.739.740.129.627.228.529.823.732.333.526.524.626.933.422.423.225.728.830.626.4
Perth Metro25.331.426.826.928.732.033.035.137.229.829.533.039.739.828.926.228.529.825.231.633.327.324.027.132.723.023.026.028.430.125.7
Rottnest Island22.623.823.023.823.726.830.833.132.024.424.327.435.839.425.923.424.427.524.125.228.125.621.526.429.821.822.723.925.127.323.5
Swanbourne23.725.624.724.527.029.833.232.933.726.225.829.839.640.727.224.228.229.926.128.329.427.023.627.133.622.923.925.527.227.324.0
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 March 2016
12345678910111213141516171819202122232425262728293031
Bickley13.012.916.712.713.415.415.416.217.618.515.916.119.421.824.016.312.413.416.315.817.717.415.615.317.017.412.711.612.314.415.2
Garden Island HSF17.116.718.318.117.218.519.720.918.420.419.319.922.626.222.420.016.217.320.119.719.920.918.518.921.019.917.316.216.515.218.2
Gosnells City15.016.315.414.417.518.819.121.420.617.018.420.422.625.223.619.616.220.420.622.621.819.919.517.315.416.015.315.1
Jandakot Aero12.912.612.512.216.617.719.018.016.413.717.019.320.526.822.618.915.316.520.916.517.619.419.018.720.819.616.711.811.712.312.4
Karnet11.513.514.712.714.016.016.017.719.014.216.316.519.423.823.916.512.313.515.515.015.1
Medina Research Centre14.012.513.513.614.017.018.919.914.814.617.617.222.919.314.316.620.017.517.820.018.1
Pearce RAAF13.712.212.413.616.716.719.619.515.313.216.718.318.026.920.519.316.016.520.416.819.720.719.018.821.120.315.913.812.613.312.2
Perth Airport13.412.812.614.817.118.819.219.017.113.918.719.820.126.222.119.416.016.820.417.919.520.919.018.621.119.916.512.712.512.811.8
Perth Metro15.713.315.115.417.318.519.019.517.816.518.718.721.126.022.619.516.216.920.717.119.120.719.218.520.919.916.913.212.713.413.4
Rottnest Island17.817.519.718.017.918.719.920.920.320.219.820.121.525.021.719.416.517.318.919.921.220.818.818.921.019.917.316.017.318.719.0
Swanbourne15.715.016.715.816.618.219.620.619.019.018.119.821.226.822.319.715.917.120.518.921.220.419.218.721.219.816.614.014.015.017.1
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 March 2016
12345678910111213141516171819202122232425262728293031
Anketell 0.8 - - - - - - - - - - - - - - - - - - - - - 0.2 - - 12.4 3.4
Bickley 0.6 - - - - - - - - - - - - - - - -
0.6 5.6 - - - - - 12.2 29.0 - - - -
Bungendore 0.2 - - - - - - - - - - - - - - - - - - - - - - - - 12.6 6.2 - - - -
Chidlow - - - - - - - - - - - - - - - - - - - 15.2 - - - 13.8 - 28.0

Garden Island HSF - - - - - - - - - - - - - - - - - - - - - - - - - 19.8 2.0 - - - -
Gidgegannup 0.2 - - - - - - - - - - - - - - - - - 0.2 26.4 0.2 - - - - 39.4 30.2 - - - -
Gosnells City 0.2 - - - - - - - - - - - - - - - - - - 0.4 0.4 - - 19.6 4.2 - - - -
Jandakot Aero - - - - - - - - - - - - - - - - - - - - - - - - - 10.6 8.0 - - - -
Jarrahdale 1.0 - - - - - - - - - - - - - - - - - - - - - 0.2 - - 15.6 4.4 - 0.2 0.2 -
Karnet 0.6 - - - - - - - - - - - - - - - - - 4.0 - -
0.2 -






Karragullen North 0.2 - - - - - - - - - - - - - - - - - 0.2 1.2 - - - - - 14.2 10.2



Maida Vale - - - - - - - - - - - - - - - - - - 1.2 1.8 - - - - - 8.6 11.0 -


Medina Research Centre 0.1 - - - - - - - - - - - - - - - - - - - - - 0.2







Midland - - - - - - - - - - - - - - - - - - 2.6 - - - - - - - 25.6 - -
Mount Helena

















0.4 35.2




31.8 24.4



Mundaring 0.6 - - - - - - - - - - - - - - - - - 0.2 27.8 - - - - - 12.4 21.6



Pearce RAAF - - - - - - - - - - - - - - - - - - - 35.2 - - - - - 14.8 51.8 - - - -
Perth Airport - - - - - - - - - - - - - - - - - - - 2.0 - - - - - 7.4 10.4 - - - -
Perth Metro - - - - - - - - - - - - - - - - - - - 1.2 - - - - - 9.0 6.6 - - - -
Pickering Brook


















1.8




15.4 13.0



Roleystone 0.6 - - - - - - - - - - - - - 0.3 - - - - - - - - - - - 17.8



Rottnest Island - - - - - - - - - 0.2 - - - - - - - - 4.2 0.2 - - - - - 15.8 3.6 - - - -
Serpentine 0.2 - - - - - - - - - - - - - - - - - - 0.2 - - - - - 15.4 1.4 - - - -
Swanbourne - - - - - - - - - - - - - - - - - - - 0.2 - - - - - 14.8 11.6 - - - -
Wanneroo - - - - - - - - - - - - - - 0.8 - - - 3.0 - - - - 26.2

Werribee - - - - - - - - - - - - - - - - - - 1.8 24.4 0.2 5.4 - - - 9.2 55.6 0.2 - - -
Whiteman Park - - - - - - - - - - - - - - - - - - 1.6 0.8 - - 0.2 - - 9.0 16.6



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 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. Later information, including data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

A climate summary is generally published on the first working day of each month.

This statement has been prepared based on information available at 10 am on Friday 1 April 2016. 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.

The ACORN-SAT dataset is used for temperature area averages.

Further information

Media
(03) 9669 4057
Enquiries