It was less than a week ago that Glen Innes recorded the coldest morning in Australia this winter. Now, New South Wales can look forward to a few warm days to shake off the mid-winter chills. 

Sydney reached 24 degrees on Sunday afternoon, its warmest day since late May, and eight degrees above the July average. 

But it wasn't just Sydney that was basking in the summer-like warmth, across the state Sunday’s daytime temperatures were between three-to-eight degrees warmer than average. 

Even at the newly-famous cold-spot, Glen Innes, after starting the day at -6 degrees, Sunday warmed up to an impressive 16 degrees. 

For Monday, most suburbs will see similar temperatures, with the warmest places peaking at 25 degrees, while about the ski resorts most places are only reaching five degrees or less. 

On Tuesday, most of the heat will be confined to northeastern parts, with Kempsey and Grafton looking to be the warmest in the state at 26 degrees. For far southern parts, the cold air from a front will be arriving, with sub-zero temperatures and blizzard-like conditions across the Alps. 

The cold air will slowly make its way north during Wednesday and Thursday, taking the region into colder mornings again.