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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

Scorpions, rats emerge as rain continues to fall in flood-hit Tennant Creek

22:25 EDT

Less than three weeks into 2017, the desert town of Tennant Creek in the NT is already just 89 millimetres shy of reaching its average yearly rainfall, with the unusual downpour said to be leading to an influx of creepy crawlies.

Central Australian tourists treated to 'desert in her party dress' after constant rainfall

22:16 EDT

Rain has continued to fall in parts of Central Australia, ensuring the current greenery continues.

Rivers rising and roads cut across northern Western Australia

18:18 EDT

The Great Northern Highway has been closed between Fitzroy Crossing and Halls Creek, as rivers rise across northern Western Australia following a week of steady rain.