Sydneysiders were reminded winter has arrived this morning, as the city shivered through its coldest morning since September, with more to come. A cold air mass combined with generally clear skies to cause the mercury to dip to 8.5 degrees early this morning. Those on their morning run or walk would have really noticed it, as the wind chill made it feel more like five degrees. Some other surrounding suburbs also saw their coldest night since spring, with Bankstown dipping to 3.3 degrees, and Terrey Hills 5.9 degrees. Sydney has done well to escape the nippy nights this year, with the city's minimum only just below average for June. In fact, it has been five years since nights have taken this long to become this cool this late in the year. The following few nights should be a bit warmer due to increased cloud cover. However, the chilly nights look like returning from about Friday as skies become a bit clearer. Similarly cold nights should persist into at least early next week.