Perth has experienced its longest run of summer days below 35 degrees in more than two decades.
The cool spell has now entered its 31st day, but is set to end on Thursday when the temperature reaches 37 degrees Celsius.
The previous record is from 1994, when the city had 23 days under 35C.
Western Australia has experienced a cooler start to the year, with an average maximum temperature of 30C for January and February.
In scenes that were anything but summery, ex-tropical Cyclone Joyce last month caused heavy showers and cool temperatures across the city, dumping four months of rain in a single day.
Summer temperatures far from sizzling
The Bureau of Meteorology's Glen Cook said Perth has had fewer really hot days this summer, with no days over 40C.
He said the reason was high pressure systems failing to linger in the Great Australian Bight.
"One of the things that we see during summer on the high temperature days is the high pressure systems sitting in the Bight and bringing easterly winds to the south west land division," Mr Cook said.
"If those high pressure systems sit there for long enough we start to see some really hot days, and few days 40 degrees or above."
Mr Cook said very few high pressure systems had stayed in the Bight this year.
"The systems have been moving through at a reasonable pace and that means that after warm days we tend to get a bit of a cooler change quite soon afterwards, so no longer spells of high temperatures"
Thursday's hot day will be no exception, with the temperature dropping back down to 34C on Friday.
The weekend and the start of next week looks set to remain in the low 30s.
And, with just a fortnight left to run on summer, Thursday could be Perth's last chance at a hot day.