Illawarra residents were no doubt reaching for an extra layer of clothing – or pulling up the doona – on Thursday morning, as the mercury plummeted to unseasonably-cool levels.
After a run of warm nights so far this month, Thursday’s minimum at Bellambi dipped to 10.9 degrees at 5.12am – eight degrees cooler than the previous day’s overnight low and the suburb’s coldest November morning in 12 years.
The frigid conditions came after parts of the region were drenched by more than 30 millimetres of rain as a cold front moved across the state on Wednesday.
Albion Park recorded 32.2mm in the 24 hours to 9am on Thursday, Kiama had 33.4mm and 23.6mm fell at Bellambi.
Weatherzone meteorologist Ben Domensino said a broad cold front, linked to a deep low pressure system travelling across the Southern Ocean, “transported a stream of unseasonably-cold air over southeastern Australia”.
“The broad fetch of winds directing this polar air mass towards Australia is a pattern more typically seen during winter or early spring than November,” Mr Domensino said in a post on the Weatherzone website.
The system also delivered snow to Tasmania's Central Highlands on Wednesday, as well as a mix of rain and hail in southern Victoria.
Mr Domensino said the combination of the cold air mass and a high pressure system passing over southern Australia had also resulted in unusually-low minimum temperatures in the 24 hours to 9am on Thursday.
Sydney shivered through its coldest November morning in 12 years on Thursday, with the mercury dipping to 11.6 degrees at 3.24am.
Looking ahead, Wollongong can expect a partly cloudy Friday, with a maximum of 20 degrees in the city.
The weekend should bring mostly sunny conditions and tops in the mid-to-high 20s along the coast and inland.