Perth Monthly Climate Summary: December 2006
Warmer than normal December in Perth
December Rainfall - near average: The city received
5.2 mm of rainfall over 2 days in December compared with the average of
13 mm over 4 days. Last December Perth registered 5.0 mm on 5 days.
Mean daily maximum temperature - above average: Perth's
mean daily maximum temperature in December was 30.4°C, making it the
equal highest mean daily maximum temperature for December since 1999.
The December average is 28.7°C whilst last year was a very cool 23.7°C.
Daily maxima ranged from a mild 21.5°C on the 8th to a very hot 38.8°C
on the 16th.
Climate of Perth in January
It is midsummer in Perth in January, and days are generally sunny and either warm or hot. The low humidity that generally occurs on days of high temperature makes conditions more tolerable. Sea-breezes that blow across the coastal plain on most afternoons moderate the temperature. Hot spells, usually of two or three days' duration, are commonly followed by cooler conditions for a similar period. On average, January is Perth's driest month with 9 mm of rain over two days.
Very hot days in January: On average, Perth can expect one day when the maximum temperature is 40 degrees or higher. The greatest number of such days in January was four in 1961, 1965 and 1968. The last time Perth recorded such a day in January was on 11 January 2004 when 40.5 degrees was recorded.
Hot days in January: On average, Perth can expect twelve days when the maximum temperature is 32 degrees or higher. The highest number of such days in January was 24 in 1962, when the record highest mean maximum temperature for January (34.4 degrees) was set.
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.