Thursday, 1 March 2018 - Seasonal Climate Summary for Greater Perth - Product code IDCKGC21L0

Greater Perth in summer 2017-18: A wet summer with mild temperatures

Rainfall in summer 2017-18 was above average across the Greater Perth region, mostly due to a very wet January. Mean maximum temperatures were generally below average, whilst mean minimum temperatures were mostly near average.

Above average rainfall across Greater Perth

• Summer rainfall totals were above average and generally ranged from 100 mm to 180 mm for most coastal plain sites and offshore Islands, reaching 200 mm to 240 mm in the hills
• A cloudband associated with ex-tropical cyclone Joyce brought persistent rain to Perth in mid-January; daily rainfall totals between 50 mm and 150 mm were registered on the 16th, and a summer daily rainfall record for many sites
• A hand-full of sites in the Perth hills, as well as Rottnest Island, had their wettest summer on record, whilst a few sites had their highest total summer rainfall for at least 20 years

Below average mean maximum temperature; near average mean minimum temperature

• Mean maximum temperatures were 0.5 °C to 1.5 °C below average for most sites
• Mean minimum temperatures were mostly near average, but were above average at Perth Airport and Jandakot Aerodrome
• Temperatures failed to reach 40 °C in December and February, whilst only three daily maximum temperatures of 40 °C or greater were recorded in January: 40.0 °C at Pearce RAAF on the 1st, and 40.3 °C at Mandurah and 40.1 °C at Garden Island on the 14th

Perth Metro

• Total summer rainfall for Perth Metro was 147.0 mm, which is over three times of average and the 2nd-highest summer rainfall at Perth Metro; it also ranked fourth-highest summer rainfall for Perth city from records going back to 1876
• Daily rainfall of 96.2 mm on 16 January at Perth Metro was the fourth-highest daily rainfall total in summer for the city, only behind 120.6 mm on 6 February 1992, 114.4 mm on 10 February 2017, and 104.0 mm on 22 January 2000
• The mean maximum temperature for Perth Metro was 30.1 °C,which is 0.6 °C below average, but higher than last summer when a mean of 29.8 °C was recorded
• Perth Metro recorded 10 hot days with daily maximum temperatures 35 °C or higher, which is the least number of hot days for 17 summer seasons, since 2000-01 when 9 hot days were recorded
• Perth Metro failed to record a day at or above 40 °C throughout summer, the first time this has occurred for 16 summers, since 2001-02
• The mean minimum temperature for Perth Metro was 17.6 °C, which is near average

Extremes Maps Records Summaries Important notes the top

Extremes Maps Records Summaries Important notes the top

* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported

Extremes Maps Records Summaries Important notes the top

Extremes Maps Records Summaries Important notes the top