Wind gusts of over 100km/hr were observed in Victoria yesterday, with temperatures dropping and potential showers today.
People will also need to huddle up against the chill in our southern states.
The Bureau of Meteorology has forecast a top of 14 degrees for Melbourne, 15 for Adelaide, and just 12 for Hobart.
Weatherzone said that was five to six degrees below average for this time of year.
Meanwhile, hot, dry winds are expected across New South Wales and Queensland today, increasing the fire danger ratings.
A later southerly change is expected to increase bushfire problems, Weatherzone said, pushing existing blazes in new directions and widening fire fronts.
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“Fortunately, an injection of moisture-laden air in the wake of the front will cause rain to develop over parts of eastern and north-east NSW and south-east Queensland from Thursday into Friday,” Weatherzone wrote.
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“This rain should help extinguish some of the fires in the region and add some much-needed water into the parched landscape.”
However, just to keep things interesting, this rain also has the potential to be accompanied by thunderstorms, Weatherzone warned.
Sydney today is forecast to hit a top of 25 degrees, compared to 31 for Brisbane.