Tuesday, 1 September 2009 - Seasonal Climate Summary for Perth - Product Code: IDCKGC21L0
Below average rainfall in winter for Perth
Rainfall - below average: This winter Perth received 416.8 mm of rainfall on 55 days, compared with the average of 481 mm on about 49 days. Last winter, Perth recorded 349.2 mm on 40 days. Rainfall totals for individual months this winter were: June 156.2 mm (average 177 mm), July 149.6 mm (average 170 mm) and August 111.0 mm (average 134 mm). The last time Perth exceeded the winter average of 481 mm was in 2000 with 497.2 mm. The wettest day this winter was 19 July when 30.6 mm of rain was recorded.
Mean daily maximum temperature
- near average: The mean daily maximum temperature for Perth
this winter was 18.5°C, compared with the average of 18.8°C. Last winter,
the mean daily maximum temperature was 19.1°C. Daily values this winter
ranged from a cold 12.8°C on 23 June to a warm 26.2°C on 1 June.
Mean daily minimum temperature - near average: The mean daily minimum temperature for Perth this winter was 8.5°C, compared with the average of 8.2°C. Last winter, the mean minimum temperature was 6.9°C. Daily minima this winter ranged from a very cold 1.5°C on 14 July to a mild 14.3°C on 14 August.
Note: Official Perth observations have been recorded at several different sites with varying instrumentation over the years, and these changes can affect the continuity of the climate record. For the current Perth (Mt Lawley) site, the most significant changes of this kind relate to temperature and rain days. For that reason, current mean temperature and rain-day data quoted here are based only on readings from the Perth (Mt Lawley) site, which commenced observations in 1993. Sunshine recordings are from Perth Airport and for similar reasons current means use only Perth Airport data, which commenced in 1993.