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Home › Climate › Rottnest Island Climate

Rottnest Island Long-term Averages

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Mean Max (°C)
 26.5 27.1 26.1 23.8 21.1 18.7 17.7 17.8 18.7 20.3 22.9 24.9 22.2
Mean Min (°C)
 19.1 19.4 18.5 17.2 15.2 13.3 12.3 12.3 12.9 13.8 15.8 17.6 15.6
Mean Rain (mm)
 13.5 8.3 16.8 38.2 73.2 116.8 124.1 86.5 56.1 32.4 20.5 10.5 607.8
Median Rain (mm)
 1.4 2.5 11.2 23.6 58.0 103.7 118.6 89.3 54.6 21.5 18.0 2.6 516.6
Mean Rain Days
 2.5 1.9 3.1 7.7 11.2 14.7 17.7 16.5 13.8 8.0 5.5 3.9 85.6

Rottnest Island Daily Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Max (°C)
 41.9 41.5 40.8 38.0 29.2 24.9 26.5 23.0 27.0 35.2 36.6 40.6 41.9
Low Max (°C)
 19.4 20.5 17.2 16.6 14.0 13.0 12.6 12.4 13.3 14.1 15.0 18.4 12.4
High Min (°C)
 26.4 25.0 26.0 23.4 21.1 17.8 17.0 18.0 18.6 20.1 22.1 25.7 26.4
Low Min (°C)
 11.3 10.0 2.3 4.0 1.8 3.9 6.6 6.1 6.7 6.7 6.6 11.2 1.8
High Rain (mm)
 46.8 29.0 38.0 49.8 51.2 154.7 66.8 27.2 38.0 58.0 52.0 36.2 154.7

Rottnest Island Monthly Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Mn. Max (°C)
 29.7 30.1 28.3 26.0 22.5 19.7 18.9 19.2 20.2 21.8 25.9 27.8 23.1
Low Mn. Max (°C)
 24.6 25.4 24.2 21.4 19.9 17.0 16.8 16.7 17.0 18.5 20.4 21.5 21.2
High Mn. Min (°C)
 20.8 21.7 20.8 18.5 16.9 14.4 13.5 14.2 14.6 15.0 17.5 19.0 16.6
Low Mn. Min (°C)
 17.7 17.1 14.8 15.4 13.9 12.0 11.1 11.4 11.3 12.3 14.2 15.6 14.8
High Rain (mm)
 59.0 50.2 61.4 152.2 179.6 282.6 213.8 126.2 88.2 98.8 52.0 70.0 792.6
Low Rain (mm)
 0.0 0.0 0.0 3.8 17.6 20.2 72.8 31.8 15.2 5.0 3.6 0.0 332.8

Rottnest Island Annual Temperatures & Rainfall

Rottnest Island annual climate

Rottnest Island Average Number of Days With Temperatures

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
≥ 40°C
 0.2 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3
≥ 35°C
 1.6 1.3 1.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 1.0 4.9
≥ 30°C
 5.0 6.6 4.9 1.5 0.0 0.0 0.0 0.0 0.0 0.3 1.9 4.0 21.1
≤ 2°C
 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
≤ 0°C
 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Rottnest Island 'per Week' Values (14th/86th Percentiles)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Max
 30.3 32.1 30.0 27.0 23.5 20.8 19.6 19.8 20.8 22.7 25.9 29.4 26.4
Low Max
 22.9 23.2 22.3 20.6 18.5 16.3 15.7 15.7 16.5 17.7 19.8 21.4 17.5
High Min
 21.1 21.8 21.1 19.6 17.6 15.4 14.3 14.1 14.8 16.0 17.9 20.0 19.3
Low Min
 16.6 17.0 15.9 14.8 13.0 11.0 10.2 10.3 10.9 11.6 13.3 15.0 11.9

Rottnest Island Data Availability

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Years of Minima
 23 23 24 24 22 22 23 22 22 23 23 22 22.6
Earliest Entry
 1984 1984 1984 1984 1984 1984 1983 1986 1986 1985 1983 1990 1983
Latest Entry
 2012 2012 2012 2012 2011 2011 2011 2011 2011 2011 2011 2011 2012
Years of Maxima
 23 24 24 24 22 22 23 22 22 23 23 21 22.6
Earliest Entry
 1984 1984 1984 1984 1984 1984 1983 1986 1986 1985 1983 1990 1983
Latest Entry
 2012 2012 2012 2012 2011 2011 2011 2011 2011 2011 2011 2011 2012
Years of Rainfall
 19 19 19 19 17 20 20 20 19 19 19 17 19.0
Earliest Entry
 1984 1984 1984 1984 1990 1984 1983 1985 1986 1985 1983 1995 1983
Latest Entry
 2012 2012 2012 2012 2011 2011 2011 2011 2011 2011 2011 2011 2012

Station Details

ROTTNEST ISLAND
Lower West, Western Australia
32.0069°S 115.5022°E 43m AMSL
Commenced 1983

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