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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°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
1.5 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°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°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
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

July wrap up around the grounds

16:19 EST

The month of July was quite dynamic across the nation, with some particularly strong cold fronts which delivered low level snow as far north as the Border Ranges, and spells of prolonged dry and warm conditions, particularly along the east coast.

Widespread rain to quench thirsty West Australian crops

16:02 EST

Widespread, drenching rain across many parts of Western Australia's agricultural region, brings a smile to the faces of local farmers.

The Photo Fence: Artists capture Darwin homeowners' love affair with high fences

15:20 EST

Some encase Darwin's homes in a gnarled mesh vestige while others stand like spiked watchmen separating the street from those living inside.