Tuesday, 2 October 2007 - Monthly Climate Summary for Perth - Product Code:IDCKGC11L0
Above average rainfall for September in Perth
September Rainfall - above average: The city
received 100.6 mm of rainfall over 16 days in September compared with the average
of 81 mm on about 15 days. This was the wettest September since the 102.0 mm in
2003. The wettest day in September 2007 was the 12th when 23.6 mm was recorded.
Last September Perth registered 86.4 mm on 13 days.
Mean daily maximum temperature - near average: Perth's mean
daily maximum temperature in September was 20.2°C compared with the average
20.1°C. Daily maxima ranged from a cool 17.6°C on the 7th and 13th to
a warm 27.6°C on the 3rd.
* Denotes the lowest minimum temperature for September on record on the following dates: 1 and 10 September 2005.
Climate of Perth in October
October days are generally mild, with frequent sunshine and some warm to hot days. There is typically a marked reduction in rainfall compared with September as the October rainfall average is 53 mm on about 9 days.
Hot days in October: On average, Perth has one hot day when the maximum temperature is 32°C or higher in October. The greatest number of such days was four in 1969. The last time Perth recorded an October day over 32°C was in 2000, with 34.2°C on the 28th.
Earliest 35°C day of the season: The earliest 35°C or greater maximum temperature of the season was on 20 October 1996 when 36.9°C was recorded, the fourth highest maximum temperature for October on record.
nights in October: On average, Perth can expect one cold night when the minimum
temperature is 5°C or less. There were no such nights in October 2006.
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.