Weather

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
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 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 1.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 1.0 5.0
≥ 30°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°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
32.0069°S  115.5022°E  43m AMSL
Commenced 1983
Rainfall records: 24.1 years between 1983 and 2017
Min. temperature records: 27.7 years between 1983 and 2017
Max. temperature records: 27.7 years between 1983 and 2017