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Recent climate events such as extremely high temperatures and widespread drought have focused government and public attention on the effects of climate change in Australia. [153] Rainfall in southwestern Australia has decreased by 10–20% since the 1970s, while southeastern Australia has also experienced a moderate decline since the 1990s. [150]
March Rainfall was 74% above average for NSW, and 35% above average for Victoria however overall rain was 27% below average for Australia. A large number of sites in NSW recorded their wettest March on record, in Greater Sydney, Illawarra, Northern Rivers and the Mid North Coast saw numerous daily records and monthly records broken.
According to the website, each monthly issue "contains monthly mean temperature, pressure, precipitation, vapor pressure, and sunshine for approximately 2,000 surface data collection stations worldwide and monthly mean upper air temperatures, dew point depressions, and wind velocities for approximately 500 observing sites.
In 2018, rainfall for the year was very low over the southeastern quarter of the Australian mainland. [62] Exacerbating the effects of diminished rainfall during the 2018 El Niño year were a record-breaking run of above-average monthly temperatures, with the first half of 2019 being on an El Niño alert. [63]
Brisbane's wettest day occurred on 21 January 1887, when 465 millimetres (18.3 in) of rain fell on the city, the highest maximum daily rainfall of Australia's capital cities. The wettest month on record was February 1893, when 1,025.9 millimetres (40.39 in) of rain fell, although in the last 30 years the record monthly rainfall has been a much ...
The Australian monsoon (AUM), also known as the Australian summer monsoon (ASM), [2] and the Australian-Indonesian monsoon (AIM), [3] is a monsoon system that increases thunderstorms and rainfall over many areas of Indonesia and northern Australia, from the far northern tropics of the region to the semi-arid zone of Australia, typically between ...
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Rainfall rates downwind of cities are increased between 48% and 116%. Partly as a result of this warming, monthly rainfall is about 28% greater between 20 miles (32 km) to 40 miles (64 km) downwind of cities, compared with upwind. [66] Some cities show a total precipitation increase of 51%. [67]