According to weatherzone.com.au the temperature fell to -5.1 degrees on Sunday – the city’s lowest mark of 2018 – with further sub-zero minimums predicted in the coming week.

The subsequent early-morning frosts are impacting on the safety of both motorists and pedestrians, according to council’s manager of corporate and community relations Nick Redmond.

“Where we have reports of icy conditions, council crews inspect the sites and spread rock salt on the road,” Mr Redmond explained.

“As well as providing a light layer of grit on the surface, as it dissolves the salt can reduce the slippery icy conditions.

“Salty water needs an even lower temperature to freeze, so it has to be even colder before the moisture on a road or footpath turns to ice.”

Mr Redmond urged residents with information about slippery surfaces to let council know.

“Locals know the areas where there are tall buildings shadowing roads and footpaths, and where it’s likely frost will turn to ice when temperatures drop well below zero,” he said.

Mr Redmond asked motorists to factor in the changing weather conditions when they get behind the wheel.

“The important thing is for drivers to adjust their speeds and drive to the conditions,” he said.

“Our crews believe too many drivers are still driving too quickly through shady areas where roads might be slippery.

“Drivers are urged to adjust their driving and drive to the conditions in these spots.”

Residents wanting to report an icy road or footpath to council can do so by phoning 1300 650 511.