Perisher resort is to set to open this Saturday, one week ahead of the snow season, with an overnight storm last Sunday dumping 20cm of snow across the valley.

The resort is taking advantage of freezing lows forecast throughout the week with 30 snowguns to be producing snow in the lead up to the weekend.

Perisher saw 20cm of snow dumped across the valley on the weekend. Credit:Perisher Ski Resort

Perisher's chief operating officer Peter Brulisauer said the cold nights would give a perfect start to the season.

"The last time we opened one week early was in 2012, which turned out to be a magnificent snow season," Mr Brulisauer said.