It was meant to be a reprieve from the extra cold starts to the day, but Canberra's temperature plunged again in the early hours of Monday morning.
It hit minus 7.1 degrees at 1.43am, and was still at minus 5.8 at 6.30am. The temperature fell to minus 8.2 on Sunday, after plunging to minus 8.7 on Saturday - both times colder in Canberra than Thredbo.
But Monday's top forecast temperature of 10 degrees is a bit lower than the 13 Canberrans enjoyed on Sunday afternoon. The rest of Monday is also expected to bring some rain. The Bureau of Meteorology says there is an 80 per cent chance of up to 5mm, most likely late in the morning.
Goulburn managed New South Wales's coldest temperature on Sunday with a chilly minus 10.4 after recording minus 9.7 on Saturday. Both temperatures broke July records with the coldest previously recorded as minus 8.5 in 1982.
Bureau of Meteorology senior forecaster Jake Phillips said the worst was over for Goulburn residents "for the time being". Monday is forecast to start at minus 2 and Tuesday and Wednesday will be relatively balmy 4 and 5 degree mornings.
Canberra's Sunday morning temperature came close to breaking records, Mr Phillips said.
"The last time we had something comparable was in 1982 when it was minus 8.6," he said.
"It's still a little way off the all-time record of minus 10, which was in 1971."
Bureau forecaster Helen Reid said that while Saturday was the coldest morning in at least six years, the low actually surpassed that recorded on July 29 2011, at minus 8 degrees, and was on track to break more records.
"We won't know for sure for a few days yet if it's surpassed any others, but it's definitely in the running for a medal," she said.
"It is usual [for Canberra], you'll have the odd frosty morning at minus 3 or 4 but minus 8.7 is definitely noteworthy."
It's expected to warm up to 12 degrees through Sunday, before falling again to minus 4 in the early hours of Monday morning.
Ms Reid said the recent lack of clouds had played a role in the cold starts.
"It's been so still overnight, there's been no wind, no cloud cover like a blanket to keep the warm air in overnight."
But, come Monday, Ms Reid said that ridge would be moving out and minimum temperatures would climb back up to the zero mark.
"That should feel positively tropical after this," she said. "We'll be back to our usual cold Canberra, rather than freezing Canberra."
Monday is also forecast to bring some rain. The bureau says there is an 80 per cent chance of up to 8mm. That's expected to help bring the run of sub-zero starts to the day to an end. Tuesday is expected to drop to 1 degree. But the sub-zero starts will be back again by the end of the week, when lows of minus 3 are forecast for Friday and Saturday.
In Brisbane, Queenslanders will shivering through their coldest morning of the year, too - it reached just 7.6 degrees just before 7am on Sunday.
The weather was so cold it even hampered firefighting efforts for crews battling a blaze in Bungendore on Friday night.