Western Australia is in for a wet, hot summer with rainfall and temperatures set to rise in   December. 
Weatherzone meteorologist Tristan Meyers said it was likely the state had not seen the end of rainy days in the coming month. 
"Perth has a good chance of seeing above average rainfall and higher than average temperatures in the month of   December, driven by El Nino in the Pacific Ocean and the warm waters across the central and southern Indian Ocean", Mr Meyers said.
According to the Bureau of Meteorology, El Nino refers to the extensive warming of the central and eastern tropical Pacific that leads to a major shift in weather patterns.
Mr Meyers said Perth recorded slightly above average temperatures and below average rainfall so far in   November.
"We were and are currently in El Nino conditions, which means that Perth had a greater risk of seeing below-average rainfall and higher than average temperatures in   November," he said.
"El Nino has a greater effect in the south and east of the nation".
The hottest temperature recorded this month to date was 39.4 degrees on   November 14 - at 13 degrees above the average.
Mr Meyers said the scorching hot day marked the highest temperature recorded in any   November day since 2007.
The World Meteorological Organisation said on Wednesday this year would likely be the hottest on record, with worldwide temperatures for the first time expected to reach more than one degree above pre-industrial temperatures.
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