Temperatures at Mt William were sub-zero all Friday to 4.30pm.

Parks Victoria Grampians ranger in charge Dave Roberts said it was snowing on Friday morning.

"It started last night, and continued all the way through until about 4.30pm," he said.

"We've had a very good dump of snow, particularly around Boroka Lookout, the Wonderland area and Mt William, which has brought out many tourists and locals in the area who are sticky-beaking and having a bit of a play."

He said there were up to 30 cars in the Mt William lookout carpark, comparable to Easter crowds.

Those who were particularly determined to see the winter wonderland in all its glory made the two-kilometre trek to the summit.

"As long as people are doing it safely and taking their time, it's pretty harmless," Mr Roberts said.

"We had a couple of cars spin off the road."

He said nobody was injured.

In one instance, the car's driver was able to get their vehicle back on the roads without help.

Mr Roberts said Stawell police were called after a probationary driver lost control of their vehicle on Mt Difficult Road.

The car had to be towed after it became stuck in a difficult position.

"People, particularly in Western Victoria, don't often get the opportunity to drive in these sort of conditions," Mr Roberts said.

He the rare road conditions might have taken people unaware.

"There was up to five centimetres of snow on the roadside," he said.

"That's a pretty serious dumping for the Grampians, that's for sure."

Some gravel roads such as Glenelg River Road, Serra Road and Redman Road were restricted to four wheel drives.

Tim's Place owner Tim Walsh said guests at his accommodation in Halls Gap were excited by the natural attraction.

He said the snow-capped mountain peaks were visible from some distance.

"It's quite spectacular," he said.

Laharum Grove owner Deirdre Baum said she spotted some snowflakes falling in Laharum about 2pm on Friday.

"They didn't touch the ground, but we had some up on the escarpment," she said.

Volunteers will head to Laharum Grove at the weekend to help the business recover from damage sustained during the Grampians bushfire in January.

The top temperature at Horsham to 4.30pm on Friday was 7.3 degrees.

Wild weather took its toll for the occupants of a house in the city.

State Emergency Service volunteers were called about 12.45pm on Friday after a tree fell, roots and all, onto the single-storey house.

Mid-west regional operations manager Kendra Clegg said part of the house and veranda were damaged.

"With the fierce winds we had across the state over the past 24 hours, we've fared pretty well in Horsham, all things considered," she said.

Frosts with temperatures down to -2 degrees are forecast for Saturday morning in parts of the Wimmera and Mallee