With just a day to go, it is shaping as Sydney's driest September on record.
With only 0.2mm of rain recorded by the Bureau of Meteorology at Observatory Hill and no more forecast over the weekend, meteorologist Jordan Notara??? expects it to be the city's most parched September in the 159 years of weather data collection.
The previous lowest rainfall was 2.1mm way back in 1882.
"We're not expecting any precipitation for the rest of September in Sydney," Mr Notara??? says.
Parts of western and north-western Sydney also hit record high temperatures for the month, including 36.5 degrees at Parramatta, 36.9 degrees at Richmond and 37.3 degrees at Penrith Lakes on September 23.
There was also a record high for the state when the temperature reached a scorching 41.4 degrees at Wanaaring, north-west of Bourke, last Wednesday.
That broke the September record of 40.5 degrees set at Wilcannia just four days earlier.
Bureau climatologist Ian Barnes-Keoghan describes it as a "very warm month" for maximum temperatures across the state.
"We've broken an enormous number of records across NSW," he says.
Bizarrely, it was also a month that started with some record low temperatures and heavy snowfalls in alpine areas.
"Australia's climate has warmed since the middle of the 20th century," Mr Barnes-Keoghan says. "For Australia as a whole, three of the past four springs have been the warmest on record."
With parks and lawns across Sydney looking especially dry for this time of year, there is relief in sight.
The bureau is predicting above-average rain for eastern Australia in October.
But the long weekend is expected to have ideal weather for getting outdoors.
The bureau is predicting maximum temperatures slightly above average - 24 degrees and partly cloudy on Saturday, 23 degrees and sunny on Sunday and 24 degrees and partly cloudy on Monday.
While predictions for the National Rugby League grand final favour the Melbourne Storm, the bureau expects nothing of the kind in the skies above Sydney Olympic Park on Sunday night.
At kick-off time - officially 7.15pm - it is forecast to be a touch below 20 degrees with clear skies.
"We may get an afternoon sea breeze come through so most likely by the time-off of kick-off there'll be some form of an easterly wind," Mr Notara says.