Friday, 30 November 2012 - Seasonal Climate Summary for Perth - Product code IDCKGC11L0

Perth in spring 2012: A warm spring

• Rainfall: average to above average
• Maximum temperature: average to above average
• Minimum temperature: near average

Rainfall

Near average rainfall in September, a dry October, and a wet November culminated in near average to above average rainfall totals across the Perth metropolitan area during spring 2012. Rainfall totals were in the 120 mm to 200 mm range, grading to 300mm to 400 mm in the Perth hills. Bickley observed its wettest spring in 43 years of record, with a very wet September and record wet November, while Jarrahdale in the southeastern recorded its wettest spring since 1991. Please refer to the individual Perth monthly climate summaries for further details.

Perth Metro recorded 164.6 mm of rainfall on 29 rain days during spring 2012, which was near the average of 155.2 mm on 30.4 rain days. Rainfall totals at Perth Metro for the individual months in spring 2012 were: September: 90.8 mm (average 80.8 mm), October: 15.6 mm (average 52.3 mm), and November 58.2 mm (average 22.1 mm).

Maximum temperature

Day-time temperatures for spring 2012 were generally above average, with mean daily maxima in the low to mid twenties.

The Perth area experienced a few hot days during spring 2012. Daily maxima were in low to mid thirties for most sites on the 1, 27 and 28 October, and 17 and 21 November as the result of troughs off the west coast directing northeasterly winds over the city. The highest temperature recorded in the metropolitan area during spring 2012 was 36.9 °C at Pearce RAAF on 17 November. The coolest spring days were confined to 4 and 27 September, with maxima mostly in the mid-teens, whilst Bickley recorded the lowest maximum in the metropolitan are on 27 September with 10.9 °C.

Perth Metro's mean daily maximum temperature for spring 2012 was 24.1 °C, which was the second warmest spring on record, behind 25.3 °C observed in spring 2010. Daily maxima during spring ranged from a cold 14.9 °C on 27 September to a hot 36.2 on 28 October.

Minimum temperature

Mean daily minimum temperatures during spring 2012 were mostly near average across the Perth region, with mean daily minima mostly in the 10 °C to 14 °C range. The near average spring was the result of a near average September, an above average October, and a near average November.

Cold nights during spring were mainly observed in the second half of September, with generally clear skies and the lowest minimum of 1.0 °C recorded at Janadokot Aerodrome on the 28th. Warm nights were experienced for many sites on 10 and 17 September, between 11th to 13th October, in the latter half of November. The warmest spring night saw a minimum of 20.2 °C recorded at Champion Lakes on 22 November.

Perth Metro's mean daily minimum temperature for spring 2012 was 12.1 °C, which is above the average of 11.6 °C. Daily minima at Perth Metro in spring ranged from 3.8 °C on 28 September to 18.8 °C on 22 November.

Wind and Sunshine

Perth’s mean daily spring sunshine was 9.7 hours per day in 2012, which is close to the long term average of 9.3 hours per day.

xtremes 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 Records Summaries Important notes the top

Extremes Records Summaries Important notes the top