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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 27.3 26.1 23.8 21.1 18.7 17.8 17.9 18.8 20.5 23.0 25.0 22.2
Mean Min (°C)
19.1 19.4 18.6 17.3 15.3 13.3 12.3 12.4 13.0 14.0 15.8 17.6 15.7
Mean Rain (mm)
12.5 7.6 18.6 36.7 77.9 111.8 118.2 86.2 57.9 30.5 20.8 10.4 603.4
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
2.4 1.8 3.3 7.7 11.5 14.7 17.4 16.6 13.8 7.8 5.6 3.7 90.4

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 23.3 30.8 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 25.3 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 61.6 154.7 66.8 27.2 42.0 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 19.8 20.2 22.6 25.9 27.8 23.2
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 19.3 16.9 14.4 13.5 14.2 14.6 15.2 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 61.4 152.2 179.6 282.6 213.8 126.2 107.0 98.8 52.0 70.0 792.6
Low Rain (mm)
0.0 0.0 0.0 3.8 17.6 20.2 54.8 31.8 15.2 5.0 3.6 0.0 332.8

Rottnest Island Annual Temperatures & Rainfall

ROTTNEST ISLAND

Mean daily minimum temp
Mean daily maximum temp
Highest/lowest on record
Highest/lowest on record
Mean monthly rainfall

Rottnest Island Average Number of Days With Temperatures

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
≥ 40.0°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
≥ 35.0°C
1.5 1.5 1.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 1.0 5.0
≥ 30.0°C
5.0 6.8 4.8 1.5 0.0 0.0 0.0 0.0 0.0 0.4 1.8 4.1 21.9
≤ 2.0°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
≤ 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
25 25 26 26 25 25 26 25 25 26 26 25 25.3
Earliest Entry
1984 1984 1984 1984 1984 1984 1983 1986 1986 1985 1983 1990 1983
Latest Entry
2014 2014 2014 2014 2014 2014 2014 2014 2014 2014 2014 2014 2014
Years of Maxima
25 26 26 26 25 25 26 25 25 26 26 24 25.3
Earliest Entry
1984 1984 1984 1984 1984 1984 1983 1986 1986 1985 1983 1990 1983
Latest Entry
2014 2014 2014 2014 2014 2014 2014 2014 2014 2014 2014 2014 2014
Years of Rainfall
21 21 21 21 20 23 23 23 22 22 22 20 21.7
Earliest Entry
1984 1984 1984 1984 1990 1984 1983 1985 1986 1985 1983 1995 1983
Latest Entry
2014 2014 2014 2014 2014 2014 2014 2014 2014 2014 2014 2014 2014

Station Details

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

Weather News

More stormy weather expected for Victoria

17:05 EST

Damaging winds are forecast to affect Victoria for the second time in two days as a cold front moves into the Bight.

Tasmania sets wet weather record after big dry, with days to spare

16:31 EST

For many Tasmanians it will be no surprise the heavy rains since the beginning of May have set a new three-month record, before the end of the period.

Adelaide weather: Flood watch for Hills, Sealink ferries cancelled as cold front approaches SA

14:46 EST

A flood watch is current in the Mount Lofty Ranges near Adelaide as another cold front approaches the region.