Sydneysiders who revelled in the sunshine over the weekend got a rude awakening on Monday morning, with temperatures well below average across most Sydney suburbs.

Camden residents shivered through the coldest temperatures in Sydney, recording a low of minus 2.7 degrees just before 7.30am. Taking into account the wind chill, however, it felt more like minus 4.9 degrees, the Bureau of Meteorology said.

Richmond was only a fraction better off with lows of minus 2.6 degrees - it felt more like minus 4.5 degrees.

Badgerys Creek and Campbelltown both felt the chill with lows of minus 1.5, while Holsworthy dipped a bit below freezing with temperatures of minus 1.

The CBD hovered around five degrees but it felt like 0.9 degrees thanks to the slight wind chill and dry air.