Rottnest Island Climate

Rottnest Island Long-term Averages

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Mean Max (°C)
26.6 27.3 26.0 23.8 21.1 18.7 17.7 17.9 18.8 20.5 23.0 25.0 22.2
Mean Min (°C)
19.1 19.4 18.6 17.2 15.2 13.3 12.3 12.4 12.9 14.0 15.9 17.6 15.7
Mean Rain (mm)
12.5 11.5 19.4 35.5 77.1 109.7 118.1 88.5 56.8 30.1 20.8 10.3 599.4
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 2.0 3.8 7.7 11.5 14.6 17.4 16.7 13.5 8.1 5.3 3.6 89.7

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 25.3 30.8 35.2 36.6 40.6 41.9
Low Max (°C)
19.4 18.0 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 25.7 26.0 23.4 21.1 17.8 17.0 18.0 18.8 20.1 22.2 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 10.8 1.8
High Rain (mm)
46.8 93.8 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 23.8 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 16.0 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 11.1 12.3 14.2 15.6 14.8
High Rain (mm)
59.0 104.0 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 0.0 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 1.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 1.0 5.0
≥ 30.0°C
5.3 6.9 4.5 1.4 0.0 0.0 0.0 0.0 0.0 0.4 1.9 4.1 22.0
≤ 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
28 28 29 29 28 27 28 27 27 28 28 27 27.7
Earliest Entry
1984 1984 1984 1984 1984 1984 1983 1986 1986 1985 1983 1990 1983
Latest Entry
2017 2017 2017 2017 2017 2016 2016 2016 2016 2016 2016 2016 2017
Years of Maxima
28 29 29 29 28 27 28 27 27 28 28 26 27.7
Earliest Entry
1984 1984 1984 1984 1984 1984 1983 1986 1986 1985 1983 1990 1983
Latest Entry
2017 2017 2017 2017 2017 2016 2016 2016 2016 2016 2016 2016 2017
Years of Rainfall
24 24 24 24 23 25 25 25 24 24 24 22 24.1
Earliest Entry
1984 1984 1984 1984 1990 1984 1983 1985 1986 1985 1983 1995 1983
Latest Entry
2017 2017 2017 2017 2017 2016 2016 2016 2016 2016 2016 2016 2017

Station Details

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

Weather News

December rain more likely as MJO looms

17:10 EDT

After an exceptionally dry November for most of Australia, there are signs that wet weather could ramp up as we head into December under the influence of the Madden-Julian Oscillation.

Queensland BOM forecast predicts fast and furious thunderstorms for south-east

13:25 EDT

Homeowners are being warned to brace for another series of destructive storms with damaging winds, heavy rain and hail this afternoon across south-east Queensland.