Perth is on track to record its warmest start to winter since 1897 and the second driest June since records began.
WA has enjoyed a balmy start to winter, with the average temperature reaching a maximum of 22.9 degrees in the first 17 days of the month, 3.5 degrees warmer than normal.
![Winter... what winter? Perth on track for warmest June on record.](http://web.archive.org./web/20170621041658im_/https://www.fairfaxstatic.com.au/content/dam/images/g/l/l/p/0/c/image.related.articleLeadwide.620x349.gwu32z.png/1497853650902.jpg)
The temperature is rivalling London's summer, which to the same date had an average maximum of 20.5 degrees.
Bureau of Meteorology spokesman Glenn Cook said the unseasonal change had been caused by a lack of cold fronts which usually come from the south and bring cooler air this time of year.
And despite the forecast for some rain this week, it is likely Perth will reach the end of June without a cold front.
Meanwhile, the warmer weather has also meant less rain.
"The 14th is the only day in June we have recorded rain, we had 26.2 millimetres," Mr Cook said.
Forecasting suggests the dry spell could result in this June being the second driest on record, after a record low of 24.6 millimetres was recorded in 2006.
Mr Cook said the three driest Junes had been recorded in the past 17 years - 2006, 2013 and 2010 – with some farmers predicting the water shortage could lead to a billion-dollar loss to the grain industry.
Despite the lack of wet weather, Watercorp data shows WA has its highest amount of water in dam storage in seven years, with levels reaching 29.8 per cent capacity on Monday.
A Watercorp spokeswoman said Perth's rainfall had reduced by around 19 per cent since the 1970s.
"In 2015, Perth's dams received the lowest level of streamflows since records began in 1911 – only 11.4 billion litres of water," she said.
"Last year was an improvement, with about 48 billion litres of inflow."
Since WA's winter sprinkler ban came into place, Watercorp has issued 651 warnings and 192 infringements for $100 to residents in the first 14 days of June.
"Last winter the ban saved 4.8 billion litres of water, which was slightly more than 2015, when we saved 4.5 billion litres," the spokeswoman said.
"In Perth we remain the highest water users across Australia and during the winter months it's important that we do not squander it on sprinkler use."
7-day Perth weather forecast
Monday: 7 – 22, mostly sunny.
Tuesday: 7 – 21, possible shower. Rain: 0-1mm
Wednesday: 10 – 19, shower or two. Rain: 2-6mm
Thursday: 11 – 19, shower or two. Rain: 2-10mm
Friday: 10 – 20, shower or two. Rain: 0-2mm
Saturday: 7 – 19, partly cloudy.
Sunday: 7 – 19, sunny.
- with AAP