Tuesday, 24 January 2023 - Annual Climate Summary for Greater Perth - Product code IDCKGC51L0

Greater Perth in 2022: Average rainfall with a hot start

Daytime and nighttime temperatures in 2022 were warmer than normal at the most sites across the Greater Perth, largely a result of exceptionally hot January and February. Annual rainfall was mostly close to average.

Near average rainfall at most sites

• Annual rainfall amounts ranged from 600–800 mm at most sites, to 900–1000 mm on the Perth hills; Huntly recorded the highest annual rainfall total with 1051.1 mm.
• Annual rainfall was close to average at most sites, although annual totals at Rottnest Island and Garden Island were 70 mm and 140 mm above average respectively. Annual rainfall was 90 mm below the annual average at Perth Airport.

A hot start to the year

• Mean maximum temperatures were within 0.5 °C of average at the coastal plain sites. Daytime temperatures at Perth Airport and Pearce RAAF were 0.9 °C and 0.6 °C above average respectively.
• Mean minimum temperatures were warmer than normal across the coastal plain and on the Perth hills, but overnight temperatures were near average at Garden Island and Mandurah.
• January was a record breaking month with a prolong severe heatwave at the mid-month; six consecutive days with maximum temperatures over 40 °C (18th-23rd) were all-time records for hot spell in Perth (123 years of record), as well as at Perth Airport and Pearce RAAF.
• February was also very hot, with mean maximum temperatures 2–3 °C above average and mean minima over 1 °C above average.
• The hottest day of the year was on 5 February at sites along the coastal plain and in the Perth hills with temperatures peaking at 44.5 °C at Swan Valley.
• The warmest night of the year was on 19 January with minimum temperatures in the mid to high 20s ,and Garden Island recorded its all-time warmest night on record
• Daily minimum temperatures on 19 January at Swanbourne (28.4 °C) and Mandurah (27.8 °C) was their all-time second-warmest night on record, behind 28.8 °C (12 March 2010) and 28.2 °C (28 January 2012) respectively.
• The coldest day of the year was on 5 August, with maximum temperatures in the low 10s; the maximum temperature of 9.4 °C at Bickley was its coldest August day in 29 years of record, and its all-time fourth-coldest day on record.
• Perth Metro recorded a total of 16 cold mornings with minimum temperatures at 5 °C or below, which was the annual third-least number of cold mornings at the current site, behind 10 in 2017 and 12 in 2020.

Perth Metro

• Total rainfall for Perth Metro was 701.6 mm, which is 95% of the long-term average of 735.6 mm
• The mean daily maximum temperature for Perth Metro was 25.2 °C, which is 0.4 °C above the long-term average of 24.8 °C. The warmest day was 42.5 °C on 5 Feb, and the coolest day was on 9 Aug when the temperature reached 12.4 °C
• The mean daily minimum temperature for Perth Metro was 13.1 °C, which is 0.2 °C above the long-term average of 12.9 °C. The coldest morning was 2.5 °C on 3 Jul, and the warmest morning was on 19 Jan when the minimum temperature was 26.7 °C

Extremes Maps Records Summaries Important notes the top

Extremes Maps Records Summaries Important notes the top

Extremes Maps Records Summaries Important notes the top

Extremes Maps Records Summaries Important notes the top