Tuesday, 1 December 2009 - Seasonal Climate Summary for Perth - Product Code: IDCKGC21L0
Average spring in Perth
Rainfall - near average: This spring the rainfall in Perth was near average. From September to November, Perth received 125.2 mm over 37 days, compared with the average of 156 mm on about 31 days. This was Perth's driest spring since 2006, then 121.2 mm on 32 days. Last spring, Perth recorded 172.0 mm over 39 days. Rainfall totals for individual months this spring were: September 80.2 mm (average 81 mm), October 6.8 (average 53 mm) and November 38.2 mm (average 22 mm). The wettest day during spring was on the 19th November when 22.4 mm of rain was recorded.
Mean daily maximum temperature - near average: The mean daily maximum temperature for Perth this spring was 22.8°C, compared with the average of 23.1°C. Daily values this spring ranged from a cold 13.9°C on 29th September to a hot 36.9°C on 17th October. Last spring the mean daily temperature was 22.7°C.
Mean daily minimum temperature - near average: The mean daily minimum temperature for Perth this spring was 12.0°C, compared with the average of 11.6°C. Daily minima ranged from a cold 3.1°C on 4th September to a warm 20.2°C on 12th November. Last spring the mean daily minimum temperature was 11.4°C.
Mean daily sunshine hours - below average: Perth's mean daily sunshine this spring was 8.8 hours, the average daily sunshine for spring is 9.3 hours. Last spring the mean daily sunshine was also 8.8 hours.
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 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 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.