Busselton has experienced more than double the usual rainfall for January in the last 48 hours due to unusual summer weather caused by Cyclone Joyce.
Tuesday, January 16, had 32.6 millimetres of rainfall, making it the wettest day of the month so far.
The total rainfall for 2018 is currently 55.4mm, significantly higher than the average rainfall for the City of Busselton in January, which is 10.1mm and 12.9mm for Busselton Airport.
As of 9am today, Busselton Airport had recorded 22mm overnight while Acton Park received 48mm, Yoongarillup 32mm and Ludlow 25mm.
Bureau of Meteorology duty forecaster James Crow said these statistics were significant for this time of year.
“This is a tropical low which is the remnants of Cyclone Joyce,” he said.
“It is tropical cyclone season so this weather can happen, in terms of what normally happens, it is usually more inland but it just so happens that this tropical low has tracked down the coast over populated areas.”
Mr Crow reported most of the heavy rain had passed and the region would experience low cloud and drizzle until Thursday evening, when it would return to a typical summer weather pattern.
The low pressure system resulted in a severe weather warning for the South West.
The warning was cancelled on Tuesday afternoon.
The public had been advised to keep away from waterways, beware of fallen trees and take extra care on the roads.
Busselton State Emergency Service president Wayne Credaro said the service had received three call outs to deal with water inundation throughout the city.