It's the lowest minimum temperature recorded for June since 2009. The lowest June minimum on record is -8.5 degrees Celsius, recorded on June 8 in 1957.

Frost and fog extended well into the morning and at 8.34am the temperature was still just -1.9 degrees Celsius.

By 10.54am it had only crept up to 2.6 degrees Celsius.

Senaka Wijekoon from the Bureau of Meteorology's Canberra office said a number of factors had combined to bring about this morning's chilly weather.

"We've had cold air coming from the Southern Ocean and also a ridge of high pressure coming over us," he said.

Mr Wijekoon said last night's lack of cloud cover also contributed, allowing significant heat to escape from the atmosphere.

A maximum temperature of 12 degrees Celsius is forecast for today, with north-westerly winds of 20km per hour and a five per cent chance of rain.

Overnight temperatures will be less extreme for the rest of the week, with minimums staying above -2 degrees Celsius.

Rain expected for tomorrow will bring slightly warmer temperatures towards the end of the week.

It comes as meteorologists tip this weekend as the snow season’s best yet.

Heavy snowfalls brought about by a series of four cold fronts predicted from Thursday, are likely to blanket alpine NSW in up to half a metre of snow, creating perfect conditions for hitting the slopes.